Consider the following statements about enzymes and coenzymes: I Enzymes and coenzymes are not changed during the catalytic reaction. II All catalytic reactions require a coenzyme to proceed. III Coenzymes can lose or gain electrons during a catalytic reaction. IV Coenzymes are inorganic molecules derived from vitamins. V Coenzymes can change the binding properties of an enzyme to allow a reaction to occur. Which of the statements above are correct? A. I, IV and V only B. I and IV only C. I, II and III only D. III and V only

SSCE VCE Chemistry Medicinal Chemistry: Consider the following statement

Consider the following statements about enzymes and coenzymes: I Enzymes and coenzymes are not changed during the catalytic reaction - VCE - SSCE Chemistry - Question 21 - 2022 - Paper 1

Question 21

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Consider the following statements about enzymes and coenzymes: I Enzymes and coenzymes are not changed during the catalytic reaction. II All catalytic reactions ... show full transcript

Worked Solution & Example Answer:Consider the following statements about enzymes and coenzymes: I Enzymes and coenzymes are not changed during the catalytic reaction - VCE - SSCE Chemistry - Question 21 - 2022 - Paper 1

Step 1

I Enzymes and coenzymes are not changed during the catalytic reaction.

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Answer

This statement is generally true. Enzymes and coenzymes do not undergo permanent changes during the catalytic processes and can participate in multiple reactions.

Step 2

II All catalytic reactions require a coenzyme to proceed.

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Answer

This statement is false. Not all catalytic reactions require coenzymes; many enzymes can catalyze reactions without them.

Step 3

III Coenzymes can lose or gain electrons during a catalytic reaction.

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Answer

This statement is true. Coenzymes often participate in redox reactions where they can accept or donate electrons.

Step 4

IV Coenzymes are inorganic molecules derived from vitamins.

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Answer

This statement is false. Coenzymes are often coenzymes of organic origin and can be derived from vitamins, but not all are inorganic.

Step 5

V Coenzymes can change the binding properties of an enzyme to allow a reaction to occur.

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Answer

This statement is true. Coenzymes can indeed affect the substrate specificity and binding affinity of enzymes.

Consider the following statements about enzymes and coenzymes: I Enzymes and coenzymes are not changed during the catalytic reaction - VCE - SSCE Chemistry - Question 21 - 2022 - Paper 1

Worked Solution & Example Answer:Consider the following statements about enzymes and coenzymes: I Enzymes and coenzymes are not changed during the catalytic reaction - VCE - SSCE Chemistry - Question 21 - 2022 - Paper 1

I Enzymes and coenzymes are not changed during the catalytic reaction.

II All catalytic reactions require a coenzyme to proceed.

III Coenzymes can lose or gain electrons during a catalytic reaction.

IV Coenzymes are inorganic molecules derived from vitamins.

V Coenzymes can change the binding properties of an enzyme to allow a reaction to occur.

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