Quiz  /  NEET MCQ on Plant Physiology

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

  • Transpiration
  • Imbibition
  • Diffusion
  • Respiration

  • 2. 
    This statement regarding enzyme inhibition is correct

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

  • PEP carboxylse and pyruvate carboxylase
  • RuBP carboxylase and PEP carboxylase
  • PEP carboxylase and RuBP carboxylase
  • RuBP carboxylase and pyruvate carboxylase

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

  • Calvin Cycle
  • Glycolytic cycle
  • Glyoxylate cycle
  • Bacterial photosynthesis

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

  • Presence of agranal chloroplasts in bundle sheath cells and granal chloroplasts in mesophyll cells
  • Presence of granal chloroplasts in bundle sheath cells and agranal chloroplasts in mesophyll cells
  • Presence of chloroplasts in epidermal and mesophyll cells
  • Presence of agranal chloroplasts in both mesophyll and bundle sheath cells

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

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

  • 7. 
    A phosphoglyceride is always composed of

  • only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate
  • only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
  • an unsaturated or saturated fatty acid esterified to a phosphate molecule to which a
  • an unsaturated or saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

  • 8. 
    Macromolecule chitin is

  • a simple polysaccharide
  • sulphur containing polysaccharide
  • phosphorous containing polysaccharide
  • nitrogen containing polysaccharide

  • 9. 
    This is a wrongly matched pair

  • Alcohol – Nitrogenase
  • Detergents – Lipase
  • Textile – Amylase
  • Fruit juice – Pectinase

  • 10. 
    The most abundant protein in the animal world is

  • Trypsin
  • Collagen
  • Haemoglobin
  • Insulin
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