NEET Botany Photosynthesis in Higher Plants MCQs

The ratio of oxygen consumed to CO2 released during photorespiration is:

Which of the following metabolites is transported from mesophyll cells to bundle sheath cells in C4 plants during active photosynthesis?

A plant is exposed to an environment with high CO2 and low O2 concentrations. Which process would be MOST directly and significantly inhibited under these conditions?

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?

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

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?

During cyclic photophosphorylation, electrons from Photosystem I are ultimately accepted by:

If a herbicide specifically inhibits the plastoquinone binding site of Photosystem II, which of the following would be the most immediate consequence?

The absorption spectrum of chlorophyll a and b shows peaks in the blue and red regions. Which statement best explains the green color of leaves?