$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$$

Question 1

Which of the following best describes the role of an enzyme in a chemical reaction?

Accepted Answer

Enzymes lower the activation energy without altering the reaction's $$\Delta G.$$

Question 2

Which of the following is NOT a function of blood buffer systems?

Accepted Answer

Transporting oxygen to tissues.

Question 3

During enzyme catalysis, which step involves the conversion of the enzyme-substrate complex (ES) into the enzyme-product complex (EP)?

Accepted Answer

Catalytic conversion of substrate to product.

Question 4

Which type of enzyme inhibition can be overcome by increasing substrate concentration?

Accepted Answer

Competitive inhibition

Question 5

Which vitamin is most likely to act as a coenzyme in redox reactions?

Accepted Answer

Vitamin B2 (riboflavin)

Question 6

Which of the following statements about DNA and RNA is correct?

Accepted Answer

DNA contains deoxyribose, while RNA contains ribose.

Question 7

Which process is responsible for synthesizing mRNA from a DNA template?

Accepted Answer

Transcription

Question 8

During DNA replication, which enzyme is responsible for joining Okazaki fragments on the lagging strand?

Accepted Answer

DNA ligase

Question 9

Which of the following is a product of glycolysis?

Accepted Answer

Pyruvate

Question 10

Which cellular organelle is the primary site for the TCA (Krebs) cycle?

Accepted Answer

Mitochondria

Question 11

Which molecule is the final electron acceptor in the electron transport chain?

Accepted Answer

Oxygen ($$O_2)$$

Question 12

Which of the following best describes catabolism?

Accepted Answer

The breakdown of complex molecules into simpler ones, releasing energy.

Question 13

Which of the following is NOT a product of the hydrolysis of ATP?

Accepted Answer

Glucose

Question 14

Which coenzyme is directly involved in the transfer of acetyl groups in metabolism?

Accepted Answer

Coenzyme A (CoA)

Question 15

Which of the following is a correct summary equation for cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{energy}$$

Question 16

Which process converts pyruvate to lactate under anaerobic conditions?

Accepted Answer

Fermentation

Question 17

Which of the following is a key intermediate in the TCA (Krebs) cycle?

Accepted Answer

Citrate

Question 18

Which process is responsible for the breakdown of fatty acids to produce acetyl-CoA?

Accepted Answer

Beta-oxidation

Question 19

Which of the following statements about feedback regulation of enzymes is correct?

Accepted Answer

Feedback regulation involves the end product inhibiting the enzyme's activity.

Question 20

Which of the following is a correct description of anabolism?

Accepted Answer

The synthesis of complex molecules from simpler ones, requiring energy.

Enzymes, Nucleic Acids, and Metabolism: Study Notes for GOB Chemistry

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