General Science - MCQ Practice Questions

Photosynthesis occurs in?

Which of the following is the primary pigment responsible for absorbing light energy in the visible spectrum during photosynthesis?

The pH of cell sap in plant cells typically ranges between:

Which element is essential for the synthesis of chlorophyll molecule and forms the central atom in its structure?

The phenomenon where plants bend towards light source is governed by which hormone?

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?

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: