791. An activated enzyme consisting of a polypeptide chain and a cofactor is called_______________?
(A: Apoenzyme)
B: Holoenzyme
C: Activated enzyme
D: Both B and C
792. Centrioles are composed of __ triplets of microtubules.
A: 3
(B: 9)
C: 10
D: 15
793. Which statement about enzymes is incorrect?
A: Some of them consist solely of protein with no non-protein part.
B: They catalyze a chemical reaction without being utilized
(C: All enzymes are fibrous Proteins.)
D: They, without their cofactor, are called apoenzyme
794. A three-dimensional cavity bearing a specific charge by which the enzyme reacts with its substrate is called_________________?
A: Active site
B: Binding site
C: Catalytic site
(D: Allosteric site)
795. Amoeboid movements and the movement of cyclosis are due to_________?
(A: Microfilaments)
B: Microtubules
C: Intermediate filaments
D: Cytoskeleton
796. What is the smallest unit of life?
A. Atom
(B. Cell)
C. Virus
D. A and B
797. Which is the main source of energy for the human brain?
A. Fats
(B. Glucose)
C. Vitamins
D. Acid
798. What is the meaning of Virus?
A. Fatal
(B. Poison)
C. Protein
D. Acid
799. The pH of human blood is between:
A. 6.5
(B. 7.4)
C. 8.9
D. 4.5
800. What is the pH of water?
A. 6.5
B. 7.4
C. 8.9
(D. 7.0)
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