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BIOLOGY

JAMB 2003 - Question 16

Biology 2003 JAMB Past Questions - Question 16: The dark reaction of photosynthesis involves the

Choose the most appropriate option for the gap .

The dark reaction of photosynthesis involves the

A: reduction of carbon (IV) oxide to organic compounds.

B: release of oxygen and the splitting of water.

C: photolysis of water and the production of starch.

D: splitting of water into hydrogen ions.

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Correct Answer

Explanation

The hydrogen released during the photolysis of water in light reaction is picked up by a co-enzyme called Nicotinamide adenine dinucleotide phosphate (NADPH) (NADPH,). The NADPH2 is carried into the dark reaction and the hydrogen molecule attached to the co-enzyme used to reduce carbon IV oxide to organic compounds like starch, proteins and oil. Options B and D occur during the light reaction while option C represents events that occur during light and dark reactions.