Biology MCQs Online Quiz Test 14

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Q.1: Malonic acid is an example of——?

  1. Irreversible inhibitor
  2. Reversible inhibitor
  3. Competitive inhibitor
  4. Non-competitive inhibitor

C

Q.2: Magnifying power of electron microscope as compared to eye is——?

  1. 500 X
  2. 250000X
  3. 500000X
  4. 250X

B

Q.3: Inhibitors which block the enzyme by forming weak bond are called——?

  1. Competitive inhibitors.
  2. Non-competitive inhibitors
  3. Irreversible inhibitors.
  4. Both a and b

D

Q.4: Which of the statement about cell membrane is not true?

  1. It contains protein molecules embedded in lipid bilayer
  2. It is a differentially permeable membrane.
  3. It contains charged pores thus ions being charged particles cross cell membrance much easier than neutral particles.
  4. It may get infolded to engulf solid or liquid material.

C

Q.5: A substance which binds at the active site of the enzyme but does not result in the formation of the products is called——–?

  1. Irreversible inhibitor
  2. Reversible inhibitor
  3. Competitive inhibitor
  4. Non-competitive inhibitor

C

Q.6: A chemical substance which can react (in place of substrate) with the enzyme but is not transformed into product/s and thus blocks the active site temporarily or permanently is called——–?

  1. Co-enzyme
  2. Blocker
  3. Inhibitor
  4. Cofactor

C

Q.7: Optimal temperature of enzymes present in human body is——-?

  1. 27?C
  2. 37?C
  3. 47?C
  4. 30?C

B

Q.8: Strengthening material of prokaryotic cell wall is—–?

  1. Cellulose
  2. Chitin
  3. Inorganic salts silica waxes and ligin
  4. Peptidoglycan or Murein.

D

Q.9: Spherical or tubular membranes which separate the material present in endoplasmic reticulum from that of cytoplasmic material are called—–?

  1. Cytosol
  2. Cisternae
  3. Polysomes
  4. Cristae

B

Q.10: Whone is not the function of endoplasmic reticulum?

  1. Nerve impulse conduction
  2. Transport of material
  3. Mechanical support
  4. Synthesis of conjugated molecules

D