MCAER PG CET 2026 BOTANY & PLANT PHYSIOLOGY QUIZ 1

 

MCAER PG CET 2026 – BOTANY & PLANT PHYSIOLOGY Mock Test

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1. Which pigment is directly involved in the photochemical reaction of photosynthesis? (PYQ 2021)

Chlorophyll a Chlorophyll b Carotene Xanthophyll

2. The opening and closing of stomata is mainly regulated by:

Calcium ions Potassium ions Magnesium ions Iron ions

3. The enzyme responsible for CO₂ fixation in C3 plants is: (PYQ 2020)

PEP Carboxylase RuBisCO ATP synthase NADP reductase

4. Photorespiration mainly occurs in which cell organelle?

Chloroplast Peroxisome Mitochondria All of the above

5. The hormone responsible for cell elongation in plants is: (PYQ 2022)

Cytokinin Auxin Ethylene Abscisic acid

6. The movement of water from cell to cell through plasmodesmata is called:

Apoplastic pathway Symplastic pathway Transmembrane pathway Active transport

7. Which enzyme is responsible for nitrogen fixation in legumes? (PYQ 2019)

Nitrogenase Nitrate reductase Nitrite reductase Catalase

8. The pressure developed in roots which helps in water movement upward is called:

Osmotic pressure Root pressure Turgor pressure Diffusion pressure

9. In C4 plants, the first stable product of CO₂ fixation is:

3-PGA Oxaloacetic acid Malic acid Pyruvic acid

10. The plant hormone responsible for stomatal closure during stress is: (PYQ 2023)

Gibberellin Auxin Abscisic acid Cytokinin