A student takes soda water in a glass, adds chlorophyll to it and keeps it in sunlight, thinking that CO₂, water, chlorophyll and light are all present. What happens after a few hours?

(a) Photosynthesis takes place and starch turns the mixture turbid. Your answer
(b) Photosynthesis does not take place because CO₂ escapes from soda water. Your answer
(c) Photosynthesis takes place and glucose is produced. Your answer
(d) Photosynthesis does not take place because intact chloroplasts are needed. Correct

Your answer: Correct answer: (d)

Explanation

Why (d) is correct

Photosynthesis needs intact chloroplasts. Chlorophyll alone, without the thylakoid membranes, electron carriers and enzymes, cannot carry out photosynthesis, so nothing happens.

Why the other options are wrong

(a) · your answer No starch can form, because chlorophyll alone cannot photosynthesise.
(b) · your answer The reason is not loss of CO₂; even with CO₂ present, free chlorophyll cannot photosynthesise.
(c) · your answer No glucose is formed without intact chloroplasts.

NCERT point: Photosynthesis is an organised process: pigments, electron carriers and enzymes work together in the chloroplast.

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A student takes soda water in a glass, adds chlorophyll to it and keeps it in sunlight, thinking that CO2, water, chlorophyll and light are all present. What happens after a few hours?

Explanation

Why (d) is correct

Why the other options are wrong

Similar questions

A student takes soda water in a glass, adds chlorophyll to it and keeps it in sunlight, thinking that CO₂, water, chlorophyll and light are all present. What happens after a few hours?