NEET Botany - MCQ Practice Questions

In C4 photosynthesis, the primary CO2 acceptor molecule is:

Which hormone is primarily responsible for closing stomata under water stress conditions?

The compensation point in photosynthesis is defined as the light intensity at which:

Which of the following statements about the light reaction of photosynthesis is INCORRECT?

In the process of guttation, water is expelled through:

The quantum yield of photosynthesis refers to:

Which of the following affects the rate of photosynthesis but NOT the rate of respiration?

The phenomenon of photoinhibition in plants occurs due to:

In the Hatch and Slack pathway, malic acid is synthesized in the mesophyll cells and transported to bundle sheath cells. This adaptation is particularly advantageous because it:

A plant exhibits high transpiration rate during midday despite adequate soil moisture. Which mechanism BEST explains stomatal opening under these conditions?

Which of the following correctly represents the sequence of electron carriers in the electron transport chain of photosynthesis (from PSII)?

The apparent photosynthesis is ALWAYS greater than true photosynthesis because:

Which statement about CAM (Crassulacean Acid Metabolism) plants is CORRECT?

The proton gradient across thylakoid membrane in photosynthesis is maintained primarily by:

A student observes that a plant kept in a completely dark room still shows some gas exchange. This can be attributed to:

The role of carotenoids in photosynthesis includes all EXCEPT:

In plants experiencing drought stress, stomatal closure occurs primarily due to a decrease in:

During photosynthesis, the splitting of water molecules occurs in which compartment of the chloroplast?

Which of the following is the correct sequence of electron carriers in the light-dependent reactions?

At what light intensity does compensation point occur in a typical C3 plant?