891. Spherical or tubular membranes which separate the material present in the endoplasmic reticulum from that of cytoplasmic material are called__________?
A: Cytosol
(B: Cisternae)
C: Polysomes
D: Cristae
892. Which one is not the function of the endoplasmic reticulum?
A: Nerve impulse conduction
B: Transport of material
C: Mechanical support
(D: Synthesis of conjugated molecules)
893. 60S and 40S subunit combine to form __ particle.
A: 100 S
B: 90 S
(C: 80 S)
D: 70 S
894. Pancreas produces secretory granules that help in digestion. These granules after passing through the endoplasmic reticulum are pinched off from __ surface of the Golgi apparatus:
A: Forming face
(B: Maturating face)
C: Any of them
D: None of these
895. Inhibitors that block the enzyme by forming a weak bond are called___________?
A: Competitive inhibitors.
(B: Non-competitive inhibitors)
C: Irreversible inhibitors.
D: Both a and b
896. Which of the statements about the cell membrane is not true?
A: It contains protein molecules embedded in the lipid bilayer
B: It is a differentially permeable membrane
(C: It contains charged pores thus ions being charged particles cross cell membrane much easier than neutral particles.)
D: It may get infolded to engulf solid or liquid material.
897. A substance that binds at the active site of the enzyme but does not result in the formation of the products is called________________?
A: Irreversible inhibitor
B: Reversible inhibitor
(C: Competitive inhibitor)
D: Non-competitive inhibitor
898. A chemical substance that 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_______________?
A: Co-enzyme
B: Blocker
(C: Inhibitor)
D: Cofactor
899. Optimal temperature of enzymes present in the human body is_____________?
A: 27°C
B: 37°C
C: 47°C
(D: 30°C)
900. 7.3 Kilo calories/mole energy is equal to _ cal/mol energy.
(A) 73
(B) 730
(C) 7300
(D) 73000
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