Question

The carbon dioxide acceptor in $C_3$ plants is

• A. Phosphoenol pyruvate (PEP).
• B. Ribulose-1, 5-diphosphate (RuDP).
• C. Phosphoglyceric acid.
• D. Ribulose monophosphate (RuMP).

Answer 1

The correct option is B Ribulose-1, 5-diphosphate (RuDP).

During photosynthesis in C${}_3$ plants, carbon dioxide undergoes different stage of chemical reaction to form carbohydrate. In the dark reaction or Calvin cycle of C${}_3$ plant, carbon dioxide diffuses into the stroma of chloroplast where the first carbon dioxide acceptor is Ribulose 1, 5-diphosphate (RuDp) fix the carbon dioxide and produces 3-phosphoglycerate. Thus, the correct answer is option B.