Friday, February 26, 2021
Std 5 Class Test English
Q. 1) Answer the following questions. (4)
1) Which race do you like the most?
Ans) ----------------------------------------------------------------------------------------
2) Complete the following sentence.
1) Pheidippides took this message .
Ans) --------------------------------------------------------------------------------------
Q. 2) Find the antonyms for the following words. (2)
1) Far x ----------
2) Night x --------
3) After x ----------
4) Light x ----------
2) Make sentences using the following phrases. (4)
1) Like the wind
Ans) --------------------------------------------------------------
2) With a heavy heart,
Ans) ---------------------------------------------------------------
Std 4 Class Test English
Q.1 Give the rhyming for the following: (01)
a) grass :________________
b) flint :__________________
QB. Give opposites for :. (01)
1) heaven ×_________________
2) brilliant ×__________________
Q.2 Who is the poet of the poem 'Flint'? (01)
Ans:-
Q.3 Give meaning of the following. (02)
a) heaven :
b) brilliant :
Q.4 Answer the following questions:. (05)
1) Where does a flint lie?
2) Is a flint attractive or colourful?
3) Who shines as blue as heaven?
4) What lies in the mud?
5) What can a flint produce?
Std 3 Class Test English
Q.1. Give Rhyming of : 03
1. Kind - ________
2. Look - ________
3. Stain - ________
Q.2. Give meaning of : 03
1. Outskirts : _______________________
2. Taunts : _________________________
3. Courtiers : _______________________
Q.3. Make meaningful sentences. 02
1. White : ________________________
2. Pretty : ________________________
Q.4. Answer the following Questions. 02
1. Was the stag hurt by the king's arrow ?
2. What did the king tell his courtiers ?
Std 1 Class Test Hindi
१)खाली जगह पूरी करो. 5marks
१)औ____ त
२)क ___ ल
३)इ ___ ली
४)ड ___ रू
५)ब ___ री
२)दो अक्षर वाले शब्द बनाओ. 5Marks
१) क ____
२) न _____
३) फ____
४) म____
५) छ____
Class:6 Sub: Hindi Weekly Test
प्रश्न नं ( 1 ) (कहानी लेखन )
लालच का परिणाम इस विषय पर एक कहानी लिखो । ( 5 )
प्रश्न नं ( 2 ) ( पत्र लेखन )
बडे़ भाई के विवाह समारोह के लिए पाँच दिन की छुट्टी चाहिए कक्षा अध्यापक को अवकाश पत्र लिखें । ( 5 )
Class:7 Sub:Hindi weekly Test
प्रश्न नं (1 ) (पत्र लेखन ) 5m
मित्र के जन्म दिन पर उसे बधाई देते हुए उनके लिए बधाई पत्र लिखें ।
प्रश्न नं (2) (कहानी लेखन) 5m
पत्थर हटाने का इनाम इस विषय पर एक कहानी लिखिऐ ।
Class:8 Sub: Hindi Weekly Test
class 8
प्रश्न नंबर :(1) अपने मित्र सहेली को दीपावली की छुट्टियों में अपने घर वाले पत्र लिखिए ! (5m)
प्रश्न नंबर :(2) निम्नलिखित शब्दों के लिंग पहचान कर लिखिए :(कोई पांच)(5m)
1 )आत्मा (2)व्यक्ति (3)बादल(4) तार (5)नोट (6)नाखून (7)पुस्तक
Class-11science Sub-Physics Weekly test
Burlington Junior College
Sub : Physics. Marks : 10
Note:Attempt all question from the following
Q.1 Define the following questions
1. What is static friction?
2. Write Advantages of friction.
3. What is stress and strain
4. Write types of stress and strain
5. What is Newton 's law of gravitation
6. What is Hooke's law?
Q.2 Explain the following questions from the following.
1. Explain about collision.
2. How many types of error explain with example?
Class-11 Commerce Sub-SP weekly test
Burlington junior college
Sub: SP
Q.1) write features of wholesaler. (5m)
Q.2) write types of Itinerant Retailer. (5m)
Class-11Arts Sub-Economics Weekly test
Burlington junior college
Class Test
Sub - Economics
Class- 11 ART'S
Marks - 10
سوال۔ مفصل جواب لکھیے۔
١-کلی معاشیات کے بنیادی نظریات کی وضاحت کیجئے-
٢-حاجات کی خصوصیات لکھیے-
Q.1) Answer in detail
1- Explain the basic concepts of macro economics.
2-Explain the characteristics of human wants.
Class:9 Sub-Maths Weekly Test
Enfant India English school
Subject :Maths ll std :lX. Marks :10
Q. 1) Solve the following questions.
1) Prove that congruent chords of a circle are equidistant from the centre of the circle.
2) Construct incirlce and circumcircle of an equilateral ΔDSP with side 7•5cm. Measure the radii of both the circles and find the ratio of the radius of circumcircle to the radius of incircle.
Wednesday, February 24, 2021
Std 5 Class Test EVS 2
Q. 1) Fill in the blanks. (4)
1) The tradition of ------------- ,-------------- and --------------- gave rise to
Various arts.
2) -------------,and ---------------- supply are essential for growing good
Crops.
3) ------------ was the land between the two rivers.
4) The ------------- flows through the eastern part of the Sahara desert,
In the north of Africa.
Q. 2) Answer the following questions. (6)
1) What were the major factors responsible for the rise of the
Early civilizations?
Ans) --------------------------------------------------------------------------------
2) Why are early civilizations known as Riverine civilizations?
Ans) --------------------------------------------------------------
Std 4 Class Test EVS 2
Q.1 Fill in the blanks. (05)
1) He captured the towns of ____________,___________,___________.
2) On the night of ___________________
3) _______________troops were camping outside the palace.
4) Shaistakhan lost the Emperor's favour and was transferred to _________________
5) Khan started shouting'________________
Q.2 Who said to whom. (02)
1) " the Devil, the Devil."__________________
2) "Shivaji Maharaj has attacked.Run ,catch him."__________________________
Q.3 State whether 'true' or 'false. (03)
(1) Every Sardar of Bijapur who was sent against Shivaji Maharaj was defeated._________________
(2) The Maratha troops moved very slow on their swift Bhimthadi ponies._______________
(3) Firangoji however accepted the tempting offer. ______________________
Std 3 Class Test EVS
Q.1. Fill in the blanks. 02
1. There is _________ among family members.
2. We should throw _________ in the dust bin and not throw bit around.
3. __________brings people together.
4. All family members should _________household chores.
Q.2. Answer in short. 04
1. Who are the members of your extended family ?
2. How are you related to them ?
3. Who does all the chores in your family ?
4. On what occasions do the members of your extended family meet ?
Q.3. Explain the following. 04
1. Small family :
2. Big family :
Std 1 Class Test Maths
1)Fill in the blanks. 5 Marks
1)50+10=____
2)40+5=____
3)35+15=___
4)20- 5=___
5)8- 4=____
2)Count and write . 3 Marks
@@@@@@@@@@@@=___
####################### =____
$$$$$$$$$$$$$$$$$$$$$=_____
3)Write the multiplication table of 6 . 2 Marks
Monday, February 22, 2021
Std 5 Class Test EVS 1
Q. 1) Answer the following questions.
1) What is necessary for digestion to take place properly? (2)
Ans) -----------------------------------------------------------------------
2) What makes the blood flow? (2)
Ans) -------------------------------------------------------------------------
3) What are the jobs of the skeletal system and excretory
System? (2)
Ans) -----------------------------------------------------------------------
4) What is blood circulation? (2)
Ans) -------------------------------------------------------------------------
5) Name the organs of the digestive system? (2)
Ans) ------------------------------------------------------------------
Std 4 Class Test EVS 1
Q.1 Fill in the blanks. (03)
1) We do not _______________ feel tired even if we have been at work.
2) we have no complaints about____________
3) A lemon sherbet is good for someone who is _____________________
Q.2 Write true or false. (03)
1) Experienced people in the family sometimes suggest such cures._________
2) If we have a cold we can inhale steam at bed-time _________________
3) Shripati was very frightened_____________
Q.4 Answer the following questions. (04)
1) What is a balm used for?
2) What are the signs which tell you that someone has a cold?
3) Why did sakhu get a throat-ache?
4) What is the home remedy for a cold?
Std 3 Class Test Marathi
प्र.१:खालील प्रश्नांचे उत्तर लिहा: ०४
१) मामाचा नाव काय होता?
२) मुलांच्या तोंडाला पाणी का सुटले?
३) कैर्यांचया फोडींना काय लावले?
४) मुलांनी आवडीने काय खाल्ले?
प्र.२: खालील दिलेल्या वस्तूंच्या नावे व किमती लिहा: ०६
१)🖋️_________
२)✏️ ________
३) 🍫________
४) 💐________
५) 🥎________
६) 🌂________
Std 1 Class Test English
1.Fill in the blanks . 4 Marks
1. Jenny is _______ a banana.
2.john is ________ a song.
3.Raj is _________ a ladder
4.The sun is ________ in the Sky.
2.Write the rhyming Words. 4 Marks
1.why _____
2.Fun _____
3. Glad _____
4.Head _____
3.Give the opposites words. 2Marks
1.Happy ×_________
2.Day ×___________
Friday, February 19, 2021
Std 3 Class Test Hindi
प्र. १. खाली जगह भरो। (०६)
का ______ की ______ कू
ठु ______ ठे ______ ठो
ती ______ तू ______ तै
प्र. २. अर्थ लिखो. (०४)
१. गाजर - ________
२. मिर्च - _________
३. लिंबू - _________
४. कांदा - _________
Std 5 Class Test Marathi
प्रश्)1) मालती ला कोणत्या गोषटी नवल वाट ले ? (3)
2) मालती ने युक्ती कराय़ची का ठऱव ले ? (3)
3) निबंध लिहा (4)
1) माझी आई
Std 4 Class Test Marathi
प्रश्न.१ शब्दार्थ : in English (१०)
१) चालक -
२) वाहक -
३) फेरीवाले -
४) सूचना फलक -
५) आरक्षण कक्ष -
६) चौकशी कक्ष -
७) ध्वनिक्षेपक -
८) स्वच्छ ठेवा -
९) उपहारगृह -
१०) बस स्थानक -
Std 1 Class Test Marathi
१)चित्र पाहून शब्द लिहा. 5 Marks
१)🏠___________
२)🍇___________
३)🤚___________
४)⏰___________
५)🦮___________
२)जोडिया लावा . 3 Marks
१)दहा ५
२)पांच १
३)एक १०
३)दोन अक्षरांचा शब्द लिहा . 2 Marks
१)____________
२)____________
Std Sr Kg Class Test English
Q:1 Write missing two letter words. (5)
___ t
O. ___
i. ___
s. ___
____. Y
____. p
_____. r
_____ x
b. _____
_____. y
Q:2 Convert these two letter words into lower form. (5)
AM. ______
TO. ______
ON. ______
BY. ______
ME. ______
GO. ______
AT. ______
OX. ______
IS. ______
UP. ______
Std Jr Kg Class Test English
Q:1 Write small alphabet n to z. (4)
Q:2 Write missing small alphabet. (4)
Q:3 Match the pair. (2)
p. q
r. p
q. r
t. o
z. t
o. z
Class: 6 Sub: Geography Weekly Test
Geography. ( 10 marks). 6th .
Q:1: who I am. (4m).
1) I connect places of equal temperature.
2) I am useful for measuring the correct temperature.
3) I get heated due to the land or water near me.
4) Land and water get heated due to me.
Q:2: answers the following. (6m) .
A) Explain with a diagram, the effect of the spherical shape of the earth on the temperature at different latitudes.
B) What is the relation between the latitudinal extent and temperature of a region?
C) what makes the isotherms run zigzag over continental areas?
Class : 7 Sub: Geography Weekly Test
Geography. (10m). 7th.
Q:1: fill in the blanks. (4m).
1) At higher altitudes air becomes _____________.
2) Air pressure is expressed in__________.
3) On the earth air pressure is ______________.
4) The _____________ pressure belt spreads between 5 degree north and 5 degree south parallel.
Q:2: Give short answer. (6m).
1) what effect does temperature have on air pressure?
2) Why is the subpolar low pressure belt formed?
3) Horizontal distribution of air pressure?
Class: 8th Sub: Geography Weekly Test
Geography. (10m). 8th.
Q:1: Explain the effect of. (Any 5). (10m).
a) Warm ocean currents on climate.
b) Cold ocean currents on the movement of iceberg.
c) The shape of the coast line on ocean currents.
d) Meeting of warm and cold ocean currents.
e) The transportational capacity of ocean currents.
f) Deep ocean currents.
Class-11science Sub-chemistry, Weekly test
Burlington junior college
Subject: Chemistry Marks-10
Topic: Hydrocarbon
Std: 11th Science
Q1) Define Alkane & give it's suitable example.
Q2) Write down any four uses of Alkene
Q3) Write down physical properties of Alkyne
Q4) What is isomerism with example
Q5) Define Iso and Neoalkane.
Class-11Commerce Sub-Economics Weekly test
Burlington junior college
Sub-economics Marks-10
Class-11 commerce
Q. 1) Write the meaning of Economics. (2 marks)
Q. 2) What are the characteristics of Wants? (4 marks)
Q. 3) Write about th Factors of Production. (4 marks
Class-11Arts Sub-sociology Weekly test
Burlington junior college
Std:12 Arts subject:sociology
Marks:10
Q:1 Answer the following.
1) Laws of three stages by August comte.
2) write importance of sociology.
سوال نمبر:۱دیے گے سوالات کے جوابات لکھے۔
۱:سماجیات کی اہمیت بیان کیجئے۔
۲:اگسٹ کامٹ کا تین منازل کا قانون بیان کیجئے۔
Wednesday, February 17, 2021
Class 8 Science 11- Human Body and Organ System Questionnaire with Answer
11- Human Body and
Organ System
Q 1.Fill in the blanks using appropriate words given in the brackets :
(haemoglobin,
alkaline, diaphragm, red bone marrow, acidic, voluntary, involuntary)
(1) RBCs of the blood contain……….. an iron compound.
(2)........
is present between thoracic and abdominal cavity.
(3)
Cardiac muscles are ……….
(4)
pH of oxygenated blood is …………
(5)
Production of RBCs occurs in .........
Ans.
(1) RBCs of the blood contain haemoglobin, an iron compound.
(2)
Diaphragm is present between thoracic and abdominal cavity.
(3)
Cardiac muscles are involuntary.
(4)
pH of oxygenated blood is alkaline.
(5)
Production of RBCs occurs in red bone marrow.
Q.
2 Find the odd one out.
(1)
A, O, K, AB, B.
(2)
Blood plasma, platelets, blood transfusion, blood corpuscles.
(3)
Trachea, alveoli, diaphragm, capillaries.
(4)
Neutrophils, globulins, albumins, prothrombin
Ans.
(1) K (All others are blood groups.)
(2) Blood transfusion (All others components of
blood.)
(3)
Capillaries (All others are parts respiratory system. Capillaries exist
throughout the body.)
(4)
Neutrophils (All others are proteins present in the plasma.)
Q.
3 Match the columns/Find out my partner
:
Group 'A' Group 'B'
(1)
Heartbeats (a) 350 ml
(2)
RBC
(b) 7.4
(3)
WBC
(c) 37° C
(4)
Blood donation (d) 72 per min
(5)
Normal body temperature (e)
50-60 lakh/mm3
(6)
pH of oxygenated blood (f)
5000-6000 per mm3
Ans.
(1) Heartbeats - 72 per min
(2)
RBC - 50-60 lakh /mm3
(3)
WBC - 5000-6000 per mm
(4)
Blood donation - 350 ml
(5)
Normal body temperature - 37°C
(6)
pH of oxygenated blood - 7.4
Q
4. Complete the following table:
Organ systems Organs Function
(1) Respiratory system
(2) Circulatory system
|
Organ
systems |
Organ |
Function |
|
(1)
Respiratory system |
Nose |
For
inhalation and exhalation. The air is filtered and made little warm when
breath passes through nose. |
|
Pharynx |
Common
passage for food and air. Leads to trachea and oesophagus. |
|
|
Wind
pipe (Trachea) |
Takes
air to lungs. Bifurcates into two bronchi |
|
|
Lungs
|
Provides
space for respiratory gaseous exchange. |
|
|
Alveolus |
Actual
gaseous exchange by taking in oxygen and giving out carbon dioxide |
|
|
Diaphragm |
By
contractions and relaxation it makes breathing movements possible. |
|
|
(2)
Circulatory system |
Heart |
Muscular
pump that can send the blood throughout the body. |
|
Arteries |
Carry
blood away from heart to all the parts of the body. Except for pulmonary
artery, all other arteries carry oxygenated blood to supply oxygen to each
and every cell. |
|
|
Veins |
Carry
blood to the heart. Except for pulmonary veins all other veins carry
deoxygenated blood from all the body cells to the heart. |
|
|
Blood
capillaries |
Each
important vital organ is provided with capillary network. Exchange of oxygen,
nutrients, hormones, vitamins, etc. takes place through the capillary wall.
Such useful substances are sent towards the cells and waste materials are
taken from the cells. |
|
|
Blood
cells |
Various
functions depending upon the type of blood cells. RBC : Carrying oxygen and
carbon dioxide. WBC : Soldiers of the body. Produce antibodies and fight
against germs of diseases. Platelets : Carry out important function in blood
clotting. |
|
|
Plasma |
Many
proteins present in the plasma which carry out definite functions. Plasma
also gives fluidity to the blood. |
Q
5. Explain the differences:
(1) External and internal respiration :
External
respiration Internal respiration
1. Intake of air from the outside into the body 1. Exchange of gases between cells and
tissue
and release of air from the body to outside is fluid is called internal respiration.
Is called external environment.
2.
External respiration occurs between cells 2.
Internal respiration occurs only in the cells
and
the external environment. of
the body.
3. It involve processes of inspiration and 3. It involves movement
of O2 from
blood
expiration. into
tissue fluid and movement of CO2
from
tissue.
4.
External respiration involves breathing 4.
Internal respiration involves neither
and
gaseous exchange. breathing
nor gaseous exchange.
5.
Oxygen combines with haemoglobin in 5. Chemical reactions occur in
the cells to
external respiration. form energy.
(2)
Arteries and veins :
Arteries Veins
1.Arteries
carry blood away from the heart 1. Veins carry blood from the
tissues of the
to
the tissues of the body. body back to the heart.
2. Arteries are located deeper within the 2. Veins are usually located
superficially
body.
beneath the surface of the skin.
3.
Arteries are thick walled. 3. Veins are thin walled.
4.
Arteries do not have valves. 4. Veins have valves.
5.
Arteries would generally remain open if 5. Veins would collapse if blood flow
stops.
blood
flow stopped, due to their thick
muscular
layer.
6.
Except pulmonary artery, all arteries 6. Except pulmonary vein, all veins
carry
carry
oxygenated blood. deoxygenated
blood.
7.
Arteries are more muscular than veins, 7. Veins are less muscular than arteries, but
which helps in transporting blood that is contain valves to help keep
blood flowing
full
of oxygen efficiently to the tissues. in the right direction, usually
toward the heart.
8. There is maximum blood pressure in the 8. There is minimum blood pressure
in the
arteries. veins.
Q.
6 Read the following paragraph and identify the disease.
Today, her child became one and half year old.
However, that child does not seem to be healthy and happy. It was continuously
crying and gradually becoming weak. It has shortness of breath. Its nails have
become blue.
Ans.
The heart of the child is not functioning properly. Bluish nails show lack of
oxygen, thus the baby may be suffering also from respiratory problems.
Q
7. Give scientific reasons.
(1) Upward and downward movement of diaphragm
occurs consecutively,
Ans.
The breathing movements are possible due to contraction and relaxation of the
diaphragm. The rib muscles also help in these movements. When the ribs rise and
diaphragm is lowered at the same time, then there is a decrease in pressure on
lungs. This causes movement of air into the lungs at the time of inhalation. On
the other hand, when ribs come back to their normal position and diaphragm is
risen, then pressure on the lungs increases. This causes movement of the air
out of the body through the nose in the form of exhalation. These movements are
possible only due to consecutive upward and downward movement of the diaphragm.
(2)
Human blood is red coloured.
Ans.
The red colour of human blood is due to haemoglobin which is a red coloured
conjugated protein with iron that is present on the red blood cells. Therefore,
it looks red.
(3)
Blood donation is considered to be superior of all donations.
Ans.
Blood cannot be manufactured by any artificial chemical process. The only way
to obtain blood is by donations of blood from a live donor. Blood is needed at
times of emergency. The life of person can be saved if timely blood transfusion
is given to the needy victim or a patient. Since such donation can save a
valuable human life, it is called superior of all donations.
(4)
Person with 'O' blood group is considered as 'universal donor'.
Ans.
Person with 'O' blood group does not have
any antigen on his/her RBCs. The '0' type blood thus cannot cause clotting
reactions in the body of the recipients. Such persons with 'O' blood group can
donate blood to any person having any blood group therefore they are considered
as 'universal donor'.
(5)
Food must have limited amount of salts.
Ans. More salt in diet means more sodium ions. These extra
sodium salts cause rise in blood pressure. Such condition is called
hypertension. This condition can be dangerous and fatal in some cases.
Therefore, one must keep control over sodium content of the food.
Q
8. Answer the following:
1.Explain the
functional correlation of circulatory system with respiratory, digestive and
excretory system.
Ans.
(1) Three systems viz. respiratory. digestive and circulatory always work in
coordination
(2)
Digestive system helps in breaking down complex food molecules into simple
soluble nutrients at the end of the digestion process.
(3)
The soluble nutrients are absorbed in the circulating blood in the villi of the
intestine.
(4)
The blood carries these nutrients to each cell during its circulation.
(5)
The respiratory system helps the oxygen from the air to be absorbed in the
blood.
(6)
This process takes place in alveolus present in lungs. The oxygen is absorbed
in the blood and through haemoglobin it is taken to every cell of the body.
At
the same time the unwanted carbon dioxide produced in each cell is given out in
a process of gaseous exchange.
(7)
The soluble nutrients, and chiefly glucose is metabolized with the help of
oxygen producing energy.
Thus,
all the three systems bring about coordinated functions to keep the body alive.
(2) Explain the
structure and function of human blood.
Ans.
I. Structure, i.e.
components of the human blood : Human blood is a fluid connective tissue
consisting of blood plasma and blood corpuscles suspended in it.
(1)
Plasma : Plasma is the fluid part of the blood which is pale yellow in colour.
It is slightly alkaline in nature. It has 90-92% water, 6-8 % proteins and 1-2
% inorganic salts.
It
contains proteins such as albumin, globulin, fibrinogen, etc. There are
inorganic ions such as Ca, Na and K.
(2)
Blood cells :
(a)
Blood cells are mainly of three types, viz. RBCs, WBCs and blood platelets.
They are produced in the red bone marrow.
(b)
RBCs are small, circular and enucleated cells. They are full of haemoglobin
which is essential in transporting oxygen. RBCs are red blood cells which are
50 to 60 lakh per cubic millimetre. Their life span is 100 to 127 days.
(c)
WBCs are large, nucleated and colourless. They are of five subtypes, viz. neutrophils,
basophils, eosinophils, monocytes and lymphocytes. They are 5 to 10 thousands
per millimetre of blood.
(d)
Platelets are very small disc-shaped blood cells which are 2.5 to 4 lakh per
cubic millimetre of blood.
II. Function of human
blood :
(1) Transport functions:
(a) Gases : Oxygen is carried via
blood from lungs to cells in various parts of body and carbon dioxide from
tissues to lungs.
(b) Nutrients : Simple nutrients
like glucose, amino acids, fatty acids are taken up by blood from wall of
alimentary canal and transported up to each cell in the body.
(c) Waste materials : Nitrogenous
wastes like ammonia, urea, creatinine are released by tissues into blood which
carries those to kidney for excretion.
(d) Enzymes and hormones : Blood
transports the enzymes and hormones from the site of their production to the
site of their action
(2) Protection : Antibodies are
produced in the blood and they protect the body from microbes and other harmful
particles.
(3) Thermoregulation : Body temperature is maintained constant at 37 °C by
vasodilation and vasoconstriction.
(4)
Maintaining the balance of minerals like Na, K in the body.
(5)
If bleeding occurs at the injury, platelets and a protein called fibrinogen of
the blood form a clot and seal the injury.
(6) Functions of blood cells :
RBCs
: With haemoglobin it carries out transport of respiratory gases.
WBCs
: Soldiers of the body. Produce antibodies and give immunity to body.
Platelets : Help in blood clotting.
(3)
Explain the importance and need of blood donation.
Ans.
Blood can never be synthesized artificially. There is no substitute for natural
blood.
Every healthy person possesses about 5 litres of blood in his or her body. In
case of haemorrhage i.e. blood loss, the blood volume may reduce which can
result into threat to life. Moreover, the loss of blood should be immediately
taken care of, otherwise it may cost the life.
Therefore
blood transfusion is very crucial in case of victims of accidents, patients of
surgeries or mothers who suffer from blood loss during childbirth
(parturition). Some diseases such as thalassemia, blood cancer, etc. also need
regular transfusions. Therefore, blood is always needed in many such
conditions. Blood donation is only option for such transfusions.
Q 9.(1) Draw a neat and labelled diagram of
Respiratory system:
Class 7 Science 11 – Cell Structure and Micro-Organism Questionnaire with Answer
11 – Cell Structure and Micro-Organism
Q 1.
Fill in the blanks.
Ans.
(1) plastids (2) fertilizers (3) chloroplasts (4) microbes/cell organelles
Q
2. What is difference between us?
(1) Plant cell and animal cell.
Plant cell
Animal cell
1.
Plant cells have cell wall made up of 1. Animal cells do not have cell
wall.
cellulose.
2. The
cytoplasm of the plant cells is lesser, 2. The cytoplasm of animal cells is more granular
and not dense.
granular and dense.
3. There is a single large vacuole located in 3. The cytoplasm is uniformly distributed in
centre
which pushes the cytoplasm to one the cell.
end.
4. There
are no lysosomes. 4. Lysosomes are
present in the animal cells. 5.
The mitochondria are few in number.
5. The mitochondria are greater in number
as compared to
the plant cells.
6
Plastids are present only in plant cells. 6. Plastids are absent in the animal
cells.
7.
Single or more but large vacuoles present. 7. Vacuoles are few and temporarily formed.
8. The vacuoles are filled up with cell sap. 8. The vacuoles are filled with food or
excretory matter.
(2) Prokaryotic cell and eukaryotic cell.
Prokaryotic cell Eukaryotic cell
1.The nucleus of prokaryotic cell is not 1. The nucleus of eukaryotic cell is
distinct distinct.
with nuclear membrane, nucleoli and
nucleoplasm.
2. Prokaryotic cells are about 1 to 10 um in 2. Eukaryotic cells are about 5 to 100 um
in size.
size. .
3. Due to the absence of nuclear membrane. 3. Due to the presence of nuclear membrane,
the nuclear material comes in contact nucleoplasm and cytoplasmn never
come
with the cytoplasm. in
physical contact with each other.
4. The cell organelles if present are without 4. The cell organelles are always bound with
membranes. membranes.
5. There is indistinct nucleoid in which 5. The nucleus is distinct with more
than
prokaryotic DNA is present. There is a one chromosomes.
single chromosome.
6. Mitochondria are absent in prokaryotic 6. Mitochondria are present in eukaryotic
cells. cells.
7. Chlorophyll is present in the vesicles and 7. Chlorophyll is always inside the
not in plastids.
chloroplasts.
8. Prokaryotic cells are found in blue-green 8. Eukaryotic cells are found in highly
algae algea and bacteria. evolved plants and animals.
Q. 3. Answer the following questions :
(1)
What is a 'cell’?
Ans.
The structural and functional unit of the body is called a cell.
(2)
Name the different organelles in a cell?
Ans.
Nucleus, endoplasmic reticulum, ribosome, Golgi body, lysosomes, mitochondria,
plastids, vacuoles are all different cell organelles.
(3) What
are micro-organisms?
Ans.
The living organisms on the earth which are in every environment but can be
seen only under compound microscope are called micro-organisms.
(4)
Which are the different types of micro-organisms?
Ans
Bactaria, virus, fungi, algae and protozoan are all the different types of
micro-organism.
(5) Who discovered the process of fermentation?
Louis
Pasteur discovered the process of fermentation.
Q 4. Explain the uses and the harmful effects of
micro-organisms.
Ans.
1. Uses of micro-organisms :
(1) Micro-organism decomposition, the wastes and sewage water. (2) By the process of
Decomposition
they keep the environment clean. Fertilizers are prepared from wastes by this
process. With the help of biogas plant, the biogas is prepared by the
micro-organisms. (3) The microbes residing in the soil and in the root nodules
of leguminous plants help in biological nitrogen fixation. This helps in
increasing fertility of soil and also in increasing the protein content of
seeds in legumes. (4) Micro-organisms help in the formation of curd and other based
products. (5) The process of fermentation is used for producing alcohol from
grains and fruits, bread from flour as well as in the production of acetic
acid, citric acid, lactic acid, vitamins, antibiotics, etc. (6) Processes like
tanning of skin, production of ropes and strings from agave are also done with
help of microbes. (7) Oil slick is cleared with the help of some specific
bacteria.
II.
Harmful effects of micro-organisms :
Micro-organisms
spoil the food. In hot and humid air there is fugal attack on food. (2)
Microbes produce enterotoxins and cause food toxic resulting into food
poisoning. (3) Harmful microbes cause diseases in plants, animals and human.
Amoebiasis, typhoid, cholera, hepatitis, gastro are caused by water and food
borne microbes. (4) Microbes cause diseases like malaria, dengue,
elephantiasis, yellow fever, chikungunya, Zika fever, etc. These diseases are
caused after mosquito transfers the miscrobes into human body. Common cold,
cough, diphtheria, pneumonia, tuberculosis are diseases of respiratory tract
which are caused by microbes.
Q
5. When will you use a simple microscope and when, a compound microscope? Explain
in detail how you will use them.
Ans.
(1) Simple microscope is of lesser magnification. One can observe, insect parts
of parts of flowers under such microscope. (2) Compound microscope is required
for the observation of microbes. (3) Here magnification is 100 to 450 times. It
is there observation of cells and tissues. (4) The simple microscope's stage
can be used for direct observation. (5) The object to be studied by compound
microscope is placed over glass slide and covered over with cover slip. The
object is sectioned into very thin slices and stained appropriately. (6) The
ocular and objective lens are brought in one line. Before that the mirror is
adjusted for optimum light. (7) The magnified view of the object is seen
through the eyepiece. (8) The coarse focus knob is adjusted first and then with
fine focus knob the accurate focussing is done. (9) In this way, simple
microscope is used for general observations and compound microscope is used for
specialized observations that require greater magnification.
Q 6. Sketch and describe in
your own words, the plant cell and animal cell.
picture
1.
Plant cell : (1) There is cellulose cell wall in plant cells which is the
outermost covering of the cell. (2) Inside the cell wall there is a plasma
membrane that encloses cytoplasm. Cell organelles are embedded in the
cytoplasm. (3) Plastid is an important cell organelle present only in plant
cells. Of these chloroplasts perform photosynthesis. (4) Nucleus endoplasmic
reticulum, Golgi body, mitochondria are the cell organelles present in the
cytoplasm. (5) Vacuole is usually single and large. Since it is present in the
centre of the cell, the cytoplasm is pushed to one end.
II.
Animal cell : (1) The outermost covering is plasma membrane. (2) Inside this
there is cytoplasm in which the cell organelles are embedded. (3) The cell
organelles are as following: Nucleus, Golgi body, endoplasmic reticulum and
many smaller vacuoles.
Q. 8.
Give scientific reasons :
(1)
Diseases spread on a large scale during periods of heavy rainfall and floods.
Ans.
The spread of disease is most likely during heavy rainfall and floods. The
water and food gets contaminated. The water logging causes growth of micro-organisms
and house flies. They spread the pathogens rapidly. The humid atmosphere
induces food spoilage. Even if flood water recedes, the poodle formed helps in
the breeding of mosquitoes. All such reasons are responsible for epidemic
spread of diseases.
(2) There is a possibility of food
poisoning if we eat stale food.
Ans.
The stale food is likely to have microbes in it. Some of the microbes produce
enterotoxins. The enterotoxins cause food poisoning. Therefore there is a
possibility of food poisoning if we eat stale food.
(3)
Soil is turned over during tilling.
Ans. There are some useful bacteria in the soil.
They help to decompose organic substances into inorganic nutrients. Thereby
they produce fertilizers. Some microbes also help in nitrogen fixation. They help the plants to get
nitrogen. Thus to have better yield of crop, the soil is turned over during
tilling to mix the bacteria.
(4)
Fungus grows quickly in moist or humid conditions.
Ans.
The fungus needs suitable conditions for the growth. The moist and humid
conditions are favourable to it. It does not grow in dry conditions.
(5) A refrigerator is used in almost
every home.
Ans. The harmful microbes do not grow in cold
temperatures. they grow only in the temperature range of 15° C to 35° C.
Refrigerator has very low temperatures. Food can be stored there without spoiling.
Therefore, to store perishable food items refrigerators have become essential
in every home.
(6)
Bread 'rises during baking.
Ans.
When the bread is prepared yeast is added to it. Yeast is a type of fungus. It
undergoes process of fermentation in the batter of bread and releases carbon
dioxide. Therefore, the bread rises during baking.
(7)
Fodder is soaked in water before offering to cattle.
Ans. By
adding the fodder into water, it is fermented. By fermentation, the vitamin
content rises in the fodder, it also becomes easier for digestion. The cattle
is thus well nourished. Therefore, fodder is soaked in water before offering to
cattle.
