NEET Botany Photosynthesis in Higher Plants MCQs

A scientist isolates chloroplasts and provides them with $^{14}CO_2$ in the dark. After a brief period, the $^{14}C$ is found predominantly in:

If a plant is exposed to $^{14}CO_2$ in the dark and then transferred to light, the $^{14}C$ label will appear first in which of the following carbohydrates?

Which enzyme in the Calvin cycle is directly responsible for incorporating CO2 into an organic molecule?

The regeneration phase of the Calvin cycle requires ATP. What is the primary role of ATP in this phase?

A mutation in a plant affects the enzyme responsible for converting glyceraldehyde-3-phosphate (G3P) to dihydroxyacetone phosphate (DHAP). Which of the following is the MOST likely direct consequence of this mutation on the Calvin cycle?

In C4 plants, the initial fixation of CO2 occurs in mesophyll cells, forming a 4-carbon compound. This compound then travels to bundle sheath cells, where it releases CO2. What is the PRIMARY advantage of this spatial separation of CO2 fixation and the Calvin cycle?

Under conditions of high temperature and drought stress, a plant closes its stomata to conserve water. Which of the following is the MOST DIRECT consequence on the Calvin cycle?

In which cell type does the Calvin cycle occur in C4 plants?

What is the main product of the light-dependent reactions that is directly used in the Calvin cycle?

Which of the following is NOT directly involved in the regeneration of RuBP during the dark phase of photosynthesis?