M.C.Q. [1 M]

MCQ 11 Mark

The poultry birds groomed for obtaining meat are called _________.

A
Pork
B
Growers
✓
Broilers
D
Poultry

Answer

Correct option: C.

Broilers

(c) Broilers
Explanation: An egg-laying poultry bird is called hen (layers) and the poultry birds groomed for obtaining meat are called

chicken or broilers.

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MCQ 21 Mark

Which one of the following will form a translucent solution in water?

A
Soil
B
Sand
✓
Starch
D
Sugar

Answer

Correct option: C.

Starch

(c) Starch
Explanation: Starch forms a colloidal solution. Colloidal solutions are translucent and their particles can pass through filter

paper to give a translucent filtrate.

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MCQ 31 Mark

Which of the following are physical changes?
i. Melting of iron metal
ii. Rusting of iron
iii. Bending of an iron rod
iv. Drawing a wire of iron metal

A
(i), (ii) and (iii)
B
(ii), (iii) and (iv)
C
(i), (ii) and (iv)
✓
(i), (iii) and (iv)

Answer

Correct option: D.

(i), (iii) and (iv)

(d) (i), (iii) and (iv)
Explanation: Melting of iron metal, bending of an iron rod and drawing wire of iron metal are all physical changes whereas

rusting of iron is a chemical change.

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MCQ 41 Mark

Amoeba acquires its food through:

A
Exocytosis & Endocytosis
B
Exocytosis
C
Plasmolysis
✓
Endocytosis

Answer

Correct option: D.

Endocytosis

(d) Endocytosis
Explanation: Amoeba acquires its food by the process of endocytosis with the help of finger-like projections called

pseudopodia (Pseudo means false; podia means feet). The flexibility of the plasma membrane enables amoeba to use

pseudopodia to engulf food and other material from its environment.

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MCQ 51 Mark

Choose the chemical compound with which the specimen is temporarily mounted.

A
Water
✓
Glycerine
C
Alcohol
D
Salt solution

Answer

Correct option: B.

Glycerine

(b) Glycerine
Explanation: Glycerine is a good dehydrating agent. It avoids the drying of the specimen. Besides, glycerine tends to reflect

light due to its refractive nature. As a result of it, the image appears clearer under the microscope. Due to these reasons, glycerine is used while preparing a temporary mount of leaf peel.

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MCQ 61 Mark

Which of the given pairs of atoms contain$(s)$ the same number of neutrons?
$i. { }_{48}^{114} Cd$ and ${ }_{50}^{119} Sn$
$ii. { }_{27}^{59} Co$ and ${ }_{28}^{59} Ni$
$iii. { }_{55}^{113} Cs$ and ${ }_{54}^{132} Xe$
$iv. { }_{29}^{63} Cu$ and ${ }_{29}^{65} Cu$

✓
$iii$ only
B
$iv$ only
C
$i$ and $iv$ only
D
$i$ and $iii$ only

Answer

Correct option: A.

$iii$ only

Number of neutrons in
$ Cd =66, Sn =69 ; Co =32, Ni =31$
$Cs =78, Xe =78 ;{ }^{63} Cu =34,{ }^{65} Cu =36$

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MCQ 71 Mark

Which of the following is the characteristic of displacement of an object?

A
Displacement has only magnitude and no specific direction
B
The magnitude of the displacement is greater than the distance travelled by a moving object
✓
Displacement has magnitude as well as specific direction
D
Displacement cannot be zero

Answer

Correct option: C.

Displacement has magnitude as well as specific direction

(c) Displacement has magnitude as well as specific direction
Explanation: The shortest distance between the initial point and the final point is called displacement. Displacement has both magnitude and direction while distance has only magnitude.

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MCQ 81 Mark

Three students A, B and C determined the volume of a solid by immersing it in water in the overflow cans are set up as shown. The result obtained will be wrong for:

A
Student A
✓
All of these
C
Student B
D
Student C

Answer

Correct option: B.

All of these

(b) All of these
Explanation: The overflow can must always be filled upto its spout before using it to measure the volume displaced by the immersed solid.

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MCQ 91 Mark

You are viewing a prepared slide of striated muscle fibres from a cockroach leg. When you focus the microscope, the striations appear pale and indistinct. To make the stations clearly visible, you would:

A
remove the mirror to cut out light
B
change the eyepiece to increase magnification
C
replace the objective to decrease the magnification
✓
slowly close the diaphragm to reduce the light

Answer

Correct option: D.

slowly close the diaphragm to reduce the light

(d) slowly close the diaphragm to reduce the light
Explanation: To make the stations clearly visible slowly close the diaphragm to reduce the light. The reduction of light gives a

better contrast.

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MCQ 101 Mark

Which of the following elements are present in Quick lime?
A. Calcium, Oxygen
B. Sodium, Hydrogen, Oxygen
C. Calcium, Bromine
D. Calcium chloride

A
(B)
B
(D)
C
(C)
✓
(A)

Answer

Correct option: D.

(A)

(d) (A)
Explanation: The chemical formula of the Quick lime is CaO. So, Calcium (Ca) and Oxygen (O) elements are present in Quick lime.

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MCQ 111 Mark

Rough endoplasmic reticulum helps in the synthesis of:

A
steroids
✓
proteins
C
starch
D
glycogen

Answer

Correct option: B.

proteins

(b) proteins
Explanation: The ribosomes on the RER are synthesizing protein by definition, meaning that ribosomes do not exist in the cell

unless they are synthesizing a protein from an mRNA template.

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MCQ 121 Mark

The tissue shown here is _________.

✓
Adipose tissue
B
Striated muscle tissue
C
Ciliated columnar epithelial tissue
D
Areolar tissue

Answer

Correct option: A.

Adipose tissue

(a) Adipose tissue
Explanation: The figure shown here is of adipose tissue. It is primarily a fat storing tissue in which the matrix is packed with

adipocytes. The tissue is found beneath the skin, in the covering of heart, around the blood vessels and kidneys, etc.

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MCQ 131 Mark

Which of the following is micro-nutrient?

✓
Boron
B
Nitrogen
C
Potassium
D
Phosphorus

Answer

Correct option: A.

Boron

(a) Boron
Explanation: Boron is an essential micronutrient which means it is essential for plant growth and development but is required

in very small quantities.

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MCQ 141 Mark

Two identical balls are at rest side by side at the bottom of a hill. Sometime after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B, it has the same

✓
Position and acceleration as ball B
B
Position and velocity as ball B
C
Displacement and velocity as ball B.
D
Velocity and acceleration as ball B

Answer

Correct option: A.

Position and acceleration as ball B

(a) Position and acceleration as ball B
Explanation: Position and acceleration of ball A is same as that of ball B at the instant when ball A passes ball B.

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MCQ 151 Mark

Lysosomes are formed by:

A
SER
✓
Golgi apparatus
C
Plasma membrane
D
RER

Answer

Correct option: B.

Golgi apparatus

(b) Golgi apparatus
Explanation: Lysosomes are manufactured and budded into the cytoplasm by the Golgi apparatus with hydrolytic enzymes

inside. The enzymes that are within the lysosome are made in the rough endoplasmic reticulum, which are then delivered to the

Golgi apparatus to synthesise lysosomes.

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MCQ 161 Mark

Ram heats a beaker containing ice and water. He measures the temperature of the content of the beaker as a function of time. Which of the following would correctly represent the result?

A
III
✓
IV
C
I
D
II

Answer

Correct option: B.

(b) IV
Explanation: Since ice and water in equilibrium, the temperature would be zero. When we heat the mixture, energy supplied is

utilised in melting the ice and the temperature does not change till all the ice melts because of the latent heat of fusion. On

further heating, the temperature of the water would increase.

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Science M.C.Q. [1 M]

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