General Science - MCQ Practice Questions

A plant cell is placed in a hypertonic solution. Which physical phenomenon occurs, and what is the correct term for it?

The root pressure phenomenon in plants is primarily due to which of the following?

Which of the following pigments is primarily responsible for absorbing light in the red and far-red regions of the spectrum in photosynthesis?

In C4 photosynthesis, the first stable compound formed after CO2 fixation is:

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

Which of the following represents the correct order of plant tissues from outside to inside in a dicot stem?

The phenomenon of senescence in plants is primarily controlled by which plant hormone?

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:

Which of the following statements about stomata is correct?

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

Which of the following is characteristic of monocot roots?

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

The green color of chloroplasts is due to which property of chlorophyll?

In woody dicots, the wood primarily consists of:

The process of nitrogen fixation in legumes is performed by which organism?

Which of the following shows the highest photosynthetic efficiency?

During photosynthesis, the lumenal pH of thylakoids drops to approximately:

Which of the following is a hydrophobic protein complex involved in photosynthesis?