BIOCHEMISTRY
ENZYMES AND METABOLISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Enzymes speed up chemical reactions.
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Enzymes are protein molecules.
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Enzymes are specific in action.
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Enzymes work best at their optimum conditions.
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Detailed explanation-1: -The active site of enzyme is highly specific for its substrate. The enzyme and substrate fit like a lock and key and thus is a lock and key model of enzyme action.
Detailed explanation-2: -The lock-and-key model portrays an enzyme as conformationally rigid and able to bond only to substrates that exactly fit the active site. The induced fit model portrays the enzyme structure as more flexible and is complementary to the substrate only after the substrate is bound.
Detailed explanation-3: -Which of the following enzyme properties is explained by the lock-and-key model? The lock-and-key model explains the specificity of enzymes by saying that they have an active site which is of the correct shape to allow the substrate to bind.
Detailed explanation-4: -The lock and key model also called Fisher’s theory is one of two models which describe the enzyme-substrate interaction. The lock and key model assumes that the active site of the enzyme and the substrate are equal shaped. It supposes that the substrate fits perfectly into the active site of the enzyme.