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The first step in dark reaction of photosynthesis is

a)

Formation of ATP

b)

Ionization of water

c)

Attachment of carbon dioxide to a pentose sugar

d)

Excitement of electron of chlorophyll by a photon of light



Question ID - 4714 | SaraNextGen Top Answer

The first step in dark reaction of photosynthesis is

a)

Formation of ATP

b)

Ionization of water

c)

Attachment of carbon dioxide to a pentose sugar

d)

Excitement of electron of chlorophyll by a photon of light

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

The first step in dark reaction of photosynthesis is Carboxylation, in which six molecules of carbon dioxide Carboxylation, in which six molecules of carbon dioxide combine with six molecules of ribulose 1, 5-biphosphate (RuBP) to form six molecules of unstable six carbon compound. Carboxylation of RuBP is catalysed by the enzyme RuBP carboxylase or RUBISCO.

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