NEET MCQ on Plant Physiology Quiz Questions

1. In the rainy season, doors get swelled up due to

A Transpiration B Imbibition C Diffusion D Respiration

2. This statement regarding enzyme inhibition is correct

A non-competitive inhibitors often bind to the enzyme irreversibly B non-competitive inhibition of an enzyme can be overcome by adding a large amount C competitive inhibition is observed when substrate and inhibitor compete for the active site D competitive inhibition is observed when substrate competes with an enzyme to bind

3. In C3 and C4 plants, primary carboxylation takes place with the help of

A PEP carboxylse and pyruvate carboxylase B RuBP carboxylase and PEP carboxylase C PEP carboxylase and RuBP carboxylase D RuBP carboxylase and pyruvate carboxylase

4. Peroxisomes are involved in which type of reactions pertaining to plant photosynthesis?

A Calvin Cycle B Glycolytic cycle C Glyoxylate cycle D Bacterial photosynthesis

5. The fundamental feature of Kranz Anatomy of C4 plants is

A Presence of agranal chloroplasts in bundle sheath cells and granal chloroplasts in mesophyll cells B Presence of granal chloroplasts in bundle sheath cells and agranal chloroplasts in mesophyll cells C Presence of chloroplasts in epidermal and mesophyll cells D Presence of agranal chloroplasts in both mesophyll and bundle sheath cells

6. The statement which is incorrect with respect to enzyme action is

A Addition of a lot of succinates does not reverse the inhibition of succinic dehydrogenase B the substrate binds with the enzyme as its active site C a non-competitive inhibitor binds the enzyme at a site distinct from that which binds D malonate is a competitive inhibitor of succinic dehydrogenase

7. A phosphoglyceride is always composed of

A only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate B only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached C an unsaturated or saturated fatty acid esterified to a phosphate molecule to which a D an unsaturated or saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

8. Macromolecule chitin is

A a simple polysaccharide B sulphur containing polysaccharide C phosphorous containing polysaccharide D nitrogen containing polysaccharide

9. This is a wrongly matched pair

A Alcohol – Nitrogenase B Detergents – Lipase C Textile – Amylase D Fruit juice – Pectinase

10. The most abundant protein in the animal world is

A Trypsin B Collagen C Haemoglobin D Insulin