Radioactive CO2(14CO2) is added to the suspension of a photosynthesising green algae. Which compound of the following will be labelled first with 14CO2 ?

Question

Radioactive CO2(14CO2) is added to the suspension of a photosynthesising green algae. Which compound of the following will be labelled first with 14CO2 ? (A) Glucose (B) RuBP (C) GP(PGA) (D) Triose phosphate

Tardigrade Admin · Accepted Answer

3-carbon, Phosphoglyceric Acid (PGA) is the first stable compound formed in Calvin cycle after the fixation of CO2 . It is a metabolic intermediate in both glycosis and the Calvin cycle.

Q. Radioactive $C O_{2} (^{14} C O_{2})$ is added to the suspension of a photosynthesising green algae. Which compound of the following will be labelled first with $^{14} C O_{2}$ ?

Glucose

RuBP

GP(PGA)

Triose phosphate

3-carbon, Phosphoglyceric Acid (PGA) is the first stable compound formed in Calvin cycle after the fixation of $C O_{2}$ . It is a metabolic intermediate in both glycosis and the Calvin cycle.

Q. Radioactive CO2​(14CO2​) is added to the suspension of a photosynthesising green algae. Which compound of the following will be labelled first with 14CO2​ ?