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Chapter 3: Problem 25

The active site of an enzyme a. is identical to that of any other enzyme. b. is the part of the enzyme where the substrate can fit. c. can be used over and over. d. is where the coenzyme binds. e. Both b and c are correct.

Short Answer

Expert verified
The correct answer is e. Both b and c are correct, as the active site is the part of the enzyme where the substrate can fit, and it can be used over and over.

Step by step solution

01

Option a

The statement says, the active site of an enzyme is identical to that of any other enzyme. This statement is incorrect because the active site of each enzyme is unique to its specific substrate, making it specific to its function.
02

Option b

The statement says, the active site is the part of the enzyme where the substrate can fit. This statement is correct because the active site is the region of an enzyme where the substrate binds, and the enzyme's specific shape allows the substrate to fit.
03

Option c

The statement says, the active site can be used over and over again. This statement is correct because, in most cases, the active site of an enzyme can be reused multiple times without being permanently altered, allowing the enzyme to catalyze many reactions.
04

Option d

The statement says, the active site is where the coenzyme binds. This statement is incorrect because the coenzyme usually binds to a different site on the enzyme called the allosteric site, not the active site. The active site is where the substrate binds to undergo a chemical reaction.
05

Option e

This statement says that both Option b and Option c are correct. As we have discussed, Option b is correct, and Option c is also correct. Therefore, Option e is the correct answer to this exercise. In conclusion, the correct answer to this exercise is: e. Both b and c are correct.

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