In an experiment in which photosynthesis is performed during the day, you provide a plant with radioactive carbon dioxide (14CO2) as a metabolic tracer. The 14C is incorporated first into oxaloacetic acid. The plant is best characterised as a

Question

In an experiment in which photosynthesis is performed during the day, you provide a plant with radioactive carbon dioxide (14CO2) as a metabolic tracer. The 14C is incorporated first into oxaloacetic acid. The plant is best characterised as a (A) C4 plant (B) C3 plant (C) CAM plant (D) insectivorous plant

Tardigrade Admin · Accepted Answer

In C4 plants, the first stable photosynthetic product is a 4-carbon compound, i.e., oxaloacetic acid (OAA), which is formed by initial fixation of CO2 by the carboxylation of phosphoenol pyruvate in the mesophyll cells. So, when radioactive 14CO2 is introduced into the reaction, it is first incorporated into the OAA. PEP + 14CO2 + H2O xrightarrow textPEP carboxylase OAA+H3PO4 In a CAM plant, although the first product formed is OAA, but here the initial CO2 fixation occurs at night.

Q. In an experiment in which photosynthesis is performed during the day, you provide a plant with radioactive carbon dioxide $(^{14} C O_{2})$ as a metabolic tracer. The $14^{C}$ is incorporated first into oxaloacetic acid. The plant is best characterised as a

$C_{4}$ plant

$C_{3}$ plant

$C A M$ plant

insectivorous plant

Q. In an experiment in which photosynthesis is performed during the day, you provide a plant with radioactive carbon dioxide (14CO2​) as a metabolic tracer. The 14C is incorporated first into oxaloacetic acid. The plant is best characterised as a

C4​ plant

C3​ plant

CAM plant

insectivorous plant

Q. In an experiment in which photosynthesis is performed during the day, you provide a plant with radioactive carbon dioxide $(^{14} C O_{2})$ as a metabolic tracer. The $14^{C}$ is incorporated first into oxaloacetic acid. The plant is best characterised as a

$C_{4}$ plant

$C_{3}$ plant

$C A M$ plant