General Science - MCQ Practice Questions

Which type of phloem tissue is responsible for translocation of sugars in plants?

The process by which plants lose water as water vapour through stomata is called:

In the light-dependent reactions, the splitting of water molecules produces oxygen, hydrogen ions, and:

The enzyme RuBisCO catalyzes the fixation of CO2 by combining it with:

Which of the following plants exhibits CAM (Crassulacean Acid Metabolism) photosynthesis?

The pulling force that moves water upward in xylem vessels is primarily due to:

In the nitrogen cycle, the conversion of atmospheric N2 into ammonia is carried out by:

When a plant wilts despite adequate soil moisture, this condition is called:

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

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?