Which of the following statements are true for enzymes regarding temperature and pH?
(i) Enzymes generally function in a narrow range of temperature and pH.
(ii) Each enzyme shows its highest activity at a particular temperature and pH called the optimum temperature and optimum pH.
(iii) Activity declines both below and above the optimum value
(iv) Low temperature destroys enzymatic activity because proteins are denatured by heat
(v) High temperature preserves the enzyme in a temporarily inactive state

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(iv) and (v)

(i), (ii) and (iii)

(iii), (iv) and (v)

(i), (ii), (iv) and (v)

answer is C.

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Detailed Solution

Enzymes generally function in a narrow range of temperature and pH.
Each enzyme shows its highest activity at a particular temperature and pH called the
optimum temperature and optimum pH.
Activity declines both below and above the optimum value of pH and temperature.
Low temperature preserves the enzymatic activity.
High temperature destroys the enzyme activity due to denaturation of enzymes.

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