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Which one of the following is not a function of chlorophyll?

June 1, 2025 by rawan239

Which one of the following is not a function of chlorophyll?

Splitting of water

Absorption of photon

Oxidation of carbohydrate

Conversion of light energy into chemical energy

This question was previously asked in

UPSC CAPF – 2021

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Chlorophyll is the primary pigment involved in photosynthesis in plants, algae, and cyanobacteria. It is located in chloroplasts and absorbs light energy necessary for the process.

Chlorophyll’s main functions in photosynthesis include the absorption of light energy (photons), initiation of the light-dependent reactions which include the splitting of water molecules (photolysis) to produce oxygen, protons, and electrons, and facilitating the conversion of light energy into chemical energy in the form of ATP and NADPH. The oxidation (breakdown) of carbohydrates, such as glucose, to release energy (ATP) is the process of cellular respiration, which occurs in mitochondria (or cytoplasm/cell membrane in some organisms) and is distinct from the function of chlorophyll and photosynthesis.

Photosynthesis involves two main stages: the light-dependent reactions, where light energy is captured and converted into chemical energy (ATP and NADPH) and water is split; and the light-independent reactions (Calvin cycle), where the chemical energy is used to fix carbon dioxide and synthesize carbohydrates. Chlorophyll is directly involved in the light-dependent reactions.

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