General Science - MCQ Practice Questions

In C4 plants, the first stable compound formed during carbon fixation is:

The root pressure phenomenon in plants can be measured using a device called:

Which of the following statements about stomatal opening is correct?

The phenomenon of leaf fall in deciduous plants before winter is regulated by which hormone?

In plant tissue culture, which growth regulator ratio promotes callus formation?

The osmotic potential of a solution is directly related to:

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

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 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:

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: