Multiple choice

Which of the following is the correct sequence of steps involved in the catalytic cycle of an enzyme?

a. The enzyme releases the products of the reaction and the free enzyme is ready to bind to another molecule of the substrate. b. The substrate binds to the active site of the enzyme, fitting into the active site. c. The active site of the enzyme breaks the chemical bonds of the substrate and the new enzyme-product complex is formed. d. The binding of the substrate induces the enzyme to alter its shape, fitting more tightly around the substrate.

  1. b - d - a - c

  2. b - c - d - a

  3. d - b - c - a

  4. b - d - c - a

  5. a - d - c - b
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The substrate binds to the active site of the enzyme, fitting into the active site. The binding of the substrate induces the enzyme to alter its shape, fitting more tightly around the substrate.The active site of the enzyme breaks the chemical bonds of the substrate and the new enzyme-product complex is formed. The enzyme releases the products of the reaction and the free enzyme is ready to bind to another molecule of the substrate.

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