Read the following sentences about photosynthesis.
(i) Sunlight, carbon dioxide, chlorophyll and water are necessary.
(ii) Oxygen is absorbed.
(iii) Leaves carry out photosynthesis.
(iv) Proteins are made during photosynthesis.

Choose the correct pair of sentences that is true to photosynthesis. [1 mark]

(a) (iii) and (iv) (b) (i) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

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Solution

Option (b).
(1 Mark)

Statements (i) and (iii) are correct. Leaves produce food for the plant. The process by which leaves prepare their food (carbohydrates) in the presence of sunlight by using water, chlorophyll, and carbon dioxide is called photosynthesis. Oxygen is given out during this process.

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Similar questions

Q. The words in columns I and II have been matched. Which is the correct set of answers?

Column I	Column II
A. oxygen	i. photosynthesis
B. carbon dioxide	ii. protection from UV rays
C. nitrogen	iii. breathing
D. ozone	iv. found in proteins

(a) A-iii; B-i; C-ii; D-iv
(b) A-iii; B-i; C-iv; D-ii
(c) A-i; B-iii; C-iv; D-ii
(d) A-i; B-iii; C-ii; D-iv

Mark ‘T’ if the statement is true and ‘F’ if it is false:

(i) Carbon dioxide is released during photosynthesis. (T/F)

(ii) Plants which synthesise their food are called saprotrophs. (T/F)

(iii) The product of photosynthesis is not a protein. (T/F)

(iv) Solar energy is converted into chemical energy during photosynthesis. (T/F)

Q. The steps necessary for setting up the experiment, ‘To demonstrate that light is necessary for photosynthesis’ are not given here in proper sequence :
I. Keep the potted plant in sunlight for 3 to 4 hours.
II. Keep the potted plant in darkness for about 48 hours.
III. Cover a leaf of the plant with a strip of black paper.
IV. Pluck the leaf and test it for starch.
The correct sequence of steps is :
(1) I, III, IV, II
(2) I, IV, III, II
(3) II, IV, III, I
(4) II, III, I, IV

Question 5

Read the following sentences about photosynthesis.
(i) Sunlight, carbon dioxide, chlorophyll and water are necessary.
(ii) Oxygen is absorbed.
(iii) Leaves carry out photosynthesis.
(iv) Proteins are made during photosynthesis.
Choose the correct pair of sentences that is true to photosynthesis.
(a) (iii) and (iv) (b) (i) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

Which of the following statements are correct?

(i) Sunlight, carbon dioxide, chlorophyll and water are necessary for photosynthesis.
(ii) Oxygen is absorbed from the atmosphere during the process of photosynthesis.
(iii) Leaves carry out photosynthesis.
(iv) Proteins are made during photosynthesis.

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Option (b). (1 Mark) Statements (i) and (iii) are correct. Leaves produce food for the plant. The process by which leaves prepare their food (carbohydrates) in the presence of sunlight by using water, chlorophyll, and carbon dioxide is called photosynthesis. Oxygen is given out during this process.