Students can practice the best Class 7 Science MCQ and Life Processes in Plants Class 7 Science Curiosity Chapter 10 MCQ Online Test with Answers for exam preparation.
Class 7 Science Chapter 10 Life Processes in Plants MCQ
Life Processes in Plants MCQ Class 7
MCQ On Life Processes in Plants Class 7
Question 1.
What is the primary site for photosynthesis in plants?
(a) Stem
(b) Roots
(c) Leaves
(d) Flowers
Answer:
(c) Leaves
Question 2.
Which gas is absorbed by plants during photosynthesis?
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Hydrogen
Answer:
(b) Carbon dioxide
Question 3.
Which pigment helps leaves capture sunlight?
(a) Carotene
(b) Xanthophyll
(c) Chlorophyll
(d) Hemoglobin
Answer:
(c) Chlorophyll
Question 4.
Which substance is produced in leaves and stored as starch?
(a) Oxygen
(b) Glucose
(c) Protein
(d) Fiber
Answer:
(b) Glucose
Question 5.
Which experiment proves that sunlight is essential for photosynthesis?
(a) Water test
(b) Iodine test with green and non-green patches
(c) Windmill test
(d) Soil test
Answer:
(b) Iodine test with green and non-green patches
Question 6.
What happens to the leaf kept inside a bottle with caustic soda in sunlight?
(a) Turns blue-black
(b) Remains colourless
(c) Turns red
(d) Becomes brown
Answer:
(b) Remains colourless
Question 7.
Which gas is released during photosynthesis?
(a) Carbon dioxide
(b) Nitrogen
(c) Oxygen
(d) Hydrogen
Answer:
(c) Oxygen
Question 8.
Which structure in leaves helps in gas exchange?
(a) Phloem
(b) Xylem
(c) Stomata
(d) Chloroplast
Answer:
(c) Stomata
Question 9.
Transport of water in plants is done by:
(a) Phloem
(b) Xylem
(c) Stomata
(d) Root hairs
Answer:
(b) Xylem
Question 10.
Which part of the plant transports food made by leaves?
(a) Root hairs
(b) Xylem
(c) Phloem
(d) Stomata
Answer:
(c) Phloem
Question 11.
What is the correct word equation for photosynthesis?
(a) Glucose + Oxygen → Carbon dioxide + Water
(b) Water + Oxygen → Carbon dioxide
(c) Carbon dioxide + Water → Glucose + Oxygen
(d) Starch + Water → Oxygen + Glucose
Answer:
(c) Carbon dioxide + Water → Glucose + Oxygen
Question 12.
What are the tiny structures in stems that transport water upward?
(a) Phloem
(b) Stomata
(c) Guard cells
(d) Xylem
Answer:
(d) Xylem
Question 13.
What is the role of chlorophyll in photosynthesis?
(a) Nitrogen
(b) Oxygen
(c) Glucose
(d) Minerals
Answer:
(a) Nitrogen
Question 14.
Which part of the plant stores excess food as starch?
(a) Captures sunlight
(b) Absorbs water
(c) Carries glucose
(d) Absorbs minerals
Answer:
(c) Carries glucose
Question 15.
Which experiment proves plants release oxygen during photosynthesis?
(a) Iodine test
(b) Lime water test
(c) Aquatic plant in sunlight with test tube
(d) Seed germination in dark
Answer:
(c) Aquatic plant in sunlight with test tube
Life Processes in Plants Class 7 Assertion Reason Questions
Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
(a) Both (A) and (R) are true and (R) is correct explanation of (A).
(b) Both (A) and (R) are true and (R) is not correct explanation of (A).
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.
1. Assertion (A): Minerals and water present in the soil are absorbed by the roots and transported to leaves.
Reason (R): Carbon dioxide from air is taken through stomata present on the surface of leaves.
Answer:
(b) Both (A) and (R) are true and (R) is not correct explanation of (A).
2. Assertion (A): All parts of a plant, green or non-green, carry out respiration.
Reason (R): Water is broken down in the presence of oxygen during respiration.
Answer:
(c) (A) is true but (R) is false.
3. Assertion (A): Green pigment found in the plant’s leaves is called chlorophyll.
Reason (R): Chlorophyll is responsible for the green colour of the plants.
Answer:
(b) Both (A) and (R) are true and (R) is not correct explanation of (A).
4. Assertion (A): The iodine solution indicates the presence of starch in the leaves.
Reason (R): The red-yellow colour confirms the presence of starch in the leaves.’
Answer:
(c) (A) is true but (R) is false.
5. Assertion (A): The final product of respiration is glucose.
Reason (R): The glucose ultimately gets converted into the starch.
Answer:
(d) (A) is false but (R) is true.
Life Processes in Plants Class 7 Fill in the Blanks
1. Green plants make their by ______.
Answer:
photosynthesis
2. Solar energy is absorbed by green plants by pigment called ______.
Answer:
chlorophyll
3. Glucose + Oxygen arrow CO2+ Water + ______。
Answer:
Energy
4. Sunlight, water, chlorophyll and ______are used by green plants in making food..
Answer:
CO2
5. A destarged plant does not possesses ______.
Answer:
starch
6. The food prepared by green plants is stored as ______.
Answer:
starch
7. When iodine solution is added to starch this becomes ______in colour.
Answer:
blue black
8. During the photosynthesis green plants take in ______and release ______.
Answer:
O2
9. Word equation of respiration is ______.
Glucose + ______→ Carbon dioxide + Energy + Water
Answer:
oxygen
10. Green leaves are primary sites for ______.
Answer:
photosynthesis
Life Processes in Plants Class 7 True or False
1. CO2 gas is released in photosynthesis.
Answer: False
2. Product is used in photosynthesis is a carbohydrate.
Answer: False
3. Plants take carbon dioxide from air by green leaves.
Answer: True
4. Plants do not require sunlight for their growth.
Answer: False
5. Plants store food in the form of water.
Answer: False
6. Chlorophyll helps in capturing sunlight.
Answer: True
7. Non-green patches of leaf contain chlorophyll.
Answer: False
8. Iodine solution is used to test the presence of starch.
Answer: True
9. Sodium hydroxide solution absorbs oxygen.
Answer: False