NEET Botany - MCQ Practice Questions

Which of the following stomatal movements is primarily controlled by turgor pressure changes in guard cells?

The phenomenon where plants exhibit different photosynthetic rates at different light intensities until a plateau is reached is called:

Which element is essential for the synthesis of chlorophyll and is present at the center of the chlorophyll molecule?

During active transport, which of the following statements is NOT correct?

Which of the following hormones primarily promotes stomatal closure in response to water stress?

The process of photorespiration in C3 plants is initiated when:

Which of the following best explains why the guttation process occurs in plants during early morning?

The Km value of an enzyme indicates:

During the Z-scheme of photosynthesis, electrons move from PSII to PSI. What happens to electrons after they leave PSI?

Which of the following processes does NOT contribute to water transport in xylem?

A plant shows wilting despite soil having adequate water. This could be due to:

The phenomenon where a plant loses its leaves in response to water shortage is controlled by which hormone?

In the electron transport chain of photosynthesis, the role of cytochrome b6f complex is to:

Which of the following C3 plants can show characteristics similar to CAM plants under water stress?

The phenomenon where stomata open partially to balance water loss and photosynthesis is called:

In phloem transport, the source is typically the:

Which of the following best describes the role of plasmodesmata in plant physiology?

A researcher observes that a plant's net photosynthesis decreases with increase in temperature above 35°C. This is primarily because:

Which of the following is the primary pigment involved in capturing light energy during photosynthesis?

The rate of transpiration is LEAST affected by which of the following factors?