861. Sources of carbohydrates in the diet come from all of the following groups of foods except:
A. Milk and milk products
B. Breads, cereals, and grain products
C. Fruits and vegetables
(D. Meat, fish, and poultry)
862. Extreme change in pH results in:
A: Change in ionization of amino acids at the active site of the enzyme
B: Change in the ionization of the substrate
(C: Denaturation of the enzyme)
D: Increase in the reaction rate
863. Resolution power of a compound microscope is:
A: 2.0 µm
B: 2-4 A
C: 24 µm
(D: 24 A)
864. Excessive increase in the temperature of the medium causes the enzyme molecule to:
A: Activate
B: Unaffected
(C: Denatured)
D: None of these
865. If enzyme concentration is low than substrate pH and temperature values are equal to requirement
then which of the following will increase the rate of the reaction?**
A: Increase in concentration of enzyme
B: Increase in concentration of substrate
C: Increase in pH
(D: Increase in temperature)
866. In cell fractionation various components of cells including its organelles can be isolated in different layers depending upon:
A: Their physical properties like size & weight.
(B: Physical properties of the medium like its density.)
C: Their electrical properties like their charges
D: Both a and b
867. The structure of an enzyme is altered by:
A: Irreversible inhibitor
B: Reversible inhibitor
C: Competitive inhibitor
(D: Non-competitive inhibitor)
868. Malonic acid is an example of:
A: Irreversible inhibitor
B: Reversible inhibitor
(C: Competitive inhibitor)
D: Non-competitive inhibitor
869. Magnifying power of electron microscope as compared to the eye is:
A: 500 X
B: 250,000 X
C: 500,000 X
(D: 250 X)
870. If more substrate to already occurring enzymatic reaction is added and there is no effect on the rate of the reaction, what is the form given to this situation?
(A: Saturation)
B: Denaturation
C: Composition
D: Inhibition
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