The lock-and-key mechanism refers to

The lock-and-key mechanism refers to

A). The complementary shapes of an enzyme and a substrate. Explanation: The Lock-and-key mechanism was proposed by Emil Fischer for the first time and characterized as the metaphor which helps in elucidating the specificity of the enzymatic reactions. In this metaphor, the lock is described as the enzyme while ‘key’ is characterized as the substrate which the enzyme acts upon. If the key is not appropriately sized, it will not fit into the active site i.e. the keyhole of the lock or enzyme and reaction will not take place. Thus, option A is the correct answer.

The complementary shapes of an enzyme and substrate

Option (1). Explanation: Enzymes are the bio catalyst that increases the rate of biochemical reactions of the body. Enzymes are highly specific in nature and works at optimum temperature and pH conditions. The enzymes work according to the lock and key mechanism. This mechanism explains that the active of enzyme should fit into the substrate in such a way as the key fits into its lock. Hence, this determines the complementary shapes of the substrate and enzyme. Thus, the correct answer is option (1).

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the complementary shapes of an enzyme and a substrate. Explanation: Enzymes are complex macromolecules which catalyse various metabolic processes in the living organism to keep them alive. Enzymes are highly specific in nature. They catalyse specific substrates involved in the reactions. Each enzyme has an active site where the specific substrate binds to the active site forming the enzyme-substrate complex. The action of an enzyme with the substrate is like working of ‘lock and key’.  According to the lock and key hypothesis, the active site of an enzyme has a very unique shape and it is only complementary to a specific substrate molecule.

The complementary shapes of an enzyme and a substrate.

Answer 6

The lock and key mechanism refers to the complementary shapes of an enzyme and a substrate.

Answer 7

the shape of the enzyme is specific to the substrate it works on, similar to how the shape of a lock is specifically designed to work with one key. the shape.

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