Class-4 Scienece Practice Set – 2

Created on August 25, 2024

OLYMPIAD CLASS -4 SCIENCE ( How plants make food )

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1 / 25

Which of the following stores the food in leaves ?

A) Cauliflower

B) Brocoli

C) Legumes

D) Spinach

2 / 25

Which of the following is NOT a product of photosynthesis ?

A) Carbon dioxide

B) Oxygen

C) Water

D) Glucose

3 / 25

What is the primary function of glucose produced during photosynthesis ?

A) To eliminate waste

B) To absorb sunlight

C) To store energy

D) To release oxygen

4 / 25

When Iodine is added to a starch solution, the colour is changed to -

A) Yellow

B) Blue black

C) Green

D) Reddish brown

5 / 25

What is the main function of glucose produced during photosynthesis ?

A) To regulate water uptake

B) To provide energy

C) To release oxygen

D) To absorb sunlight

6 / 25

The plants, that do not depend on other and make their own food are called _________ .

A) Autotrophs

B) Parasites

C) Self made

D) Heterotrophs

7 / 25

During the photosynthesis, what gas do plants take in from the atmosphere ?

A) Carbon dioxide

B) Oxygen

C) Nitrogen

D) Hydrogen

8 / 25

Which colour of light is most effective for photosynthesis ?

A) Red

B) Blue

C) Yellow

D) Green

9 / 25

Which organelle in plant cell is responsible for carrying out photosynthesis ?

A) Golgi apparatus

B) Chloroplast

C) Mitochondria

D) Nucleus

10 / 25

What is the primary purpose of photosynthesis in plants ?

A) To absorb water

B) To produce oxygen

C) To produce glucose

D) To eliminate waste

11 / 25

What is the main purpose of photosynthesis in plants ?

A) To eliminate wast products

B) To absorb water from the soil

C) To convert sunlight into chemical energy

D) To produce energy for respiration

12 / 25

Which of the following seeds contain stored food ?

A) maize

B) Potato

C) Grapes

D) Mango

13 / 25

Which colour of light is least effective for photosynthesis ?

A) Green

B) Blue

C) Red

D) Yellow

14 / 25

What is the function of chlorophyll in photosynthesis ?

A) It absorbs water

B) It stores glucose

C) It releases oxygen

D) It absorbs sunlight

15 / 25

Plants stores extra food in form of -

A) Starch

B) Carbon dioxide

C) Oxygen

D) Chlorophyll

16 / 25

What is the function of stomata in photosynthesis ?

A) To release oxygen

B) To store glucose

C) To absorb sunlight

D) To regulate gas exchange

17 / 25

What is the wast product released by plant during photosynthesis ?

A) Oxygen

B) Carbon dioxide

C) Glucose

D) Water

18 / 25

What is the roll of chlorophyll in photosynthesis ?

A) It absorbs sunlight

B) It produces oxygen

C) It releases carbon dioxide

D) It converts glucose into energy

19 / 25

What is the process by which plant make their food called ?

A) Photosynthesis

B) Digestion

C) Transpiration

D) Respiration

20 / 25

A plant was kept in a dark room for a week when its leaves were tested with iodine solution it did not show the presence of starch. From this experiment we can conclude that ________ it required for photosynthesis.

A) Sunlight

B) Iodine

C) Starch

D) Darkness

21 / 25

What is the following are called the food factories of the plants ?

A) stems

B) Roots

C) Flowers

D) Leaves

22 / 25

Which gas is utilized by plant during photosynthesis to produce glucose ?

A) Nitrogen

B) Hydrogen

C) Carbon dioxide

D) Oxygen

23 / 25

Which pigment absorbs sunlight in the process of photosynthesis ?

A) Xanthophylls

B) Chlorophyll

C) Carotenoids

D) Anthocyanins

24 / 25

Which of the following part of a cactus plants performs photosynthesis ?

A) Root

B) Spine

C) Leaves

D) Stem

25 / 25

What is the final product of photosynthesis that is used by plants for energy ?

A) Glucose

B) Carbon dioxide

C) Water

D) Oxygen

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