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Nat Quiz - 17 May

Enzymes are denatured by (Choose 1 or more answer.)
High temperature
Low temperature
Very high pH
Very low pH
High substrate concentration
High enzyme concentration
Which of the following is correct about Lock and Key hypothesis?
Substrate's shape is complementary to that of enzyme and fits exactly
Substrate's shape is complementary to that of enzyme but does not fit exactly
Substrate's shape is not complementary to that of enzymes
Substrate's shape is complementary to that of enzyme and fits exactly, causing enzyme to change shape
Which of the following statements about denaturation is correct? Choose 1 or more answer.
Denaturation is generally irreversible
Denaturation results in a change in the specific shape of active site
Denaturation is generally reversible
Denaturation can cause soluble proteins to turn into insoluble proteins
Which of the statements explain why enzyme activity decrease beyond optimum temperature? Choose 1 or more answer.
Activation energy decreases
Kinetic energy becomes too high
Substrate are not complementary to shape of enzyme's active site
Bonds that give enzyme unique 3D shape are broken
Which of the following statements about enzymes are correct?
Enzymes are made of DNA
Enzymes catalyse reversible reactions (both forward and backward)
Enzymes increase the rate of both forward and backward reaction
Enzymes catalyze virtually almost all reactions in the body
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