General Science - MCQ Practice Questions

Which of the following statements about stomatal conductance is correct?

The Hatch-Slack cycle in C4 plants first produces which compound?

The phenomenon of etiolation in plants is characterized by:

The transpiration pull mechanism in xylem transport depends on which principle?

Which plant hormone promotes fruit ripening and is commercially used in India for tomato and mango maturation?

The non-cyclic photophosphorylation in photosystem II produces:

In the electron transport chain of chloroplasts, which complex transfers electrons from water to plastoquinone?

The double fertilization process unique to angiosperms results in the formation of:

Which of the following is the primary pigment responsible for capturing light energy in photosynthesis?

The reduction phase of Calvin cycle produces which molecule as the final product?

C3 plants show a phenomenon of photorespiration. What is the primary substrate that reacts with RuBP when O2 concentration is high?

Which statement about stomata is INCORRECT?

In the light-dependent reactions, where exactly does the photolysis of water occur?

Which of the following is a C4 plant commonly found in tropical regions?

The phenomenon where plants lose water as liquid droplets from leaf margins is called:

Which plant hormone is known to have antagonistic effects to gibberellins in seed germination?

The ratio of ATP to NADPH consumed in the Calvin cycle is:

Which of the following transport mechanisms does NOT require energy in plant cells?

The Casparian strip in the endodermis of roots is primarily composed of:

Which organelle is responsible for the synthesis of ribosomal RNA in plant cells?