The first step in dark reaction of photosynthesis is

Question

The first step in dark reaction of photosynthesis is (A) formation of ATP (B) ionization of water (C) attachment of CO2 to a pentose sugar (D) excitement of electron of chlorophyll by a photon of light

Tardigrade Admin · Accepted Answer

The dark phase of photosynthesis involves fixation of CO2 by the enzyme ribulose bisphosphate carboxylase [RUBISCO]. The two substrates are CO2 and 1,5- bisphosphate (RuBP) and the product is the 3 - carbon compound, 3 - PGA (3 - phosphoglyceric acid). RuBP is a 5 - C sugar.

Q. The first step in dark reaction of photosynthesis is

formation of ATP

ionization of water

attachment of $C O_{2}$ to a pentose sugar

excitement of electron of chlorophyll by a photon of light

The dark phase of photosynthesis involves fixation of $C O_{2}$ by the enzyme ribulose bisphosphate carboxylase [RUBISCO]. The two substrates are $C O_{2}$ and 1,5- bisphosphate (RuBP) and the product is the 3 - carbon compound, 3 - PGA (3 - phosphoglyceric acid). RuBP is a 5 - C sugar.