General Science - MCQ Practice Questions

The phenomenon where certain seeds require light for germination is called:

In the Calvin cycle, how many ATP and NADPH molecules are required to fix one molecule of CO2?

Which of the following is a synthetic auxin used in agriculture?

The casparian strip in the endodermis of roots is composed of:

The rate of photosynthesis increases with increasing CO2 concentration only up to a certain point. This point is called:

Abscisic acid (ABA) functions primarily as which type of hormone?

In woody dicots, the wood primarily consists of:

The calcium pump in plant cell vacuole membrane is primarily involved in:

The phenomenon where plants show reduced photosynthesis when exposed to high oxygen concentrations is called:

Mycorrhizal associations in plants primarily enhance the uptake of which nutrients?

The casparian strip in plant roots is composed primarily of:

The quantum yield of photosynthesis (φ) represents:

Guttation in plants occurs due to:

The turgor pressure in plant cells is maintained by which osmotically active substances?

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

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

The non-cyclic photophosphorylation in photosystem II produces:

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?

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