The diagram given below represents an experiment performed to demonstrate a particular aspect of photosynthesis. The apparatus was kept in sunlight for the whole day. The numeral 1 represents a certain condition inside the flask and numeral 2 represents a chemical responsible for this condition.

Which of the following are True?
(a) The chemical substance numbered 2 is Potassium Hydroxide (KOH)
(b) The process which is reverse of photosynthesis in terms of the end-products is respiration.
(c) The special condition inside the flask is that the substance placed inside absorbs all the C $O_{2}$ and the leaf gets no C $O_{2}$ .

Only (b) is True.

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Only (a) and (b) are True.

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Only (b) and (c) are True.

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(a), (b) and (c) are True.

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Solution

The correct option is D
(a), (b) and (c) are True.

All are True

(a) The chemical substance numbered 2 is Potassium Hydroxide (KOH)
(b) The process which is reverse of photosynthesis in terms of the end-products is respiration.
(c) The special condition inside the flask is that the substance placed inside absorbs all the C $O_{2}$ and the leaf gets no C $O_{2}$ .

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Q. In an experiment, a destarched, long and narrow green leaf (still attached to a potted plant) is introduced into a wide-mouthed glass bottle through an airtight cork. The glass bottle contains some potassium hydroxide solution in its lower part (but the leaf remains above this solution). The whole set-up is placed in sunlight for 2-3 days. The leaf is then taken out. After removing chlorophyll, the leaf is treated with iodine solution. No blue-black colour is produced in the leaf.
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(c) Which condition necessary for photosynthesis is not fulfilled in this experiment?

Which of the following statements with regard to photosynthesis is/are correct?

(a) In C₄ plants, the primary CO₂ acceptor is PEP.

(b) In the photosynthetic process, PS II absorbs energy at or just below 680 nm.

Q. Which among the given conditions are represented in the following chemical equation?

2 H_{2} (g) + O_{2} (g) \to 2 H_{2} O (g)

A. Physical state of the reactants
B. Physical state of the products
C. Energy transfer

Two points in which photosynthesis and respiration in plants are opposite to each other.

(a) In photosynthesis, $C O_{2}$ is consumed while in respiration $C O_{2}$ is given out.
(b) The photosynthesis is a catabolic process while respiration is an anabolic process.

Which is true?

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