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

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 regulation involves the binding of a molecule at a site other than the active site, resulting in a change in enzyme activity?

Accepted Answer

Allosteric regulation

Question 5

Which statement correctly distinguishes between competitive and noncompetitive inhibition?

Accepted Answer

Competitive inhibitors bind to the enzyme's active site, while noncompetitive inhibitors bind elsewhere.

Question 6

Which of the following is a correct pairing of nucleotide bases in DNA?

Accepted Answer

Adenine pairs with thymine

Question 7

What is the main structural difference between DNA and RNA?

Accepted Answer

DNA contains deoxyribose, while RNA contains ribose.

Question 8

During DNA replication, which enzyme is responsible for synthesizing the new DNA strand?

Accepted Answer

DNA polymerase

Question 9

Which process describes the synthesis of mRNA from a DNA template?

Accepted Answer

Transcription

Question 10

Which of the following is a product of glycolysis?

Accepted Answer

Pyruvate

Question 11

Which organelle is primarily responsible for the TCA (Krebs) cycle and electron transport chain in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 12

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

Accepted Answer

Oxygen ($$\mathrm{O_2$})$$

Question 13

Which of the following best describes catabolism?

Accepted Answer

The breakdown of large molecules into smaller ones, releasing energy.

Question 14

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

Accepted Answer

Coenzyme A (CoA)

Question 15

What is the net ATP yield from the complete aerobic oxidation of one molecule of glucose?

Accepted Answer

$$36 to$$ $$38$$

Question 16

Which process converts pyruvate to lactate under anaerobic conditions?

Accepted Answer

Fermentation

Question 17

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

Accepted Answer

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

Question 18

Which of the following is NOT a function of vitamins in enzyme activity?

Accepted Answer

Providing structural support to enzymes.

Question 19

Which process is responsible for the synthesis of proteins from mRNA?

Accepted Answer

Translation

Question 20

Which of the following statements about ATP hydrolysis is correct?

Accepted Answer

ATP hydrolysis releases energy that can be used for cellular work.

Enzymes, Vitamins, Nucleic Acids, and Metabolic Pathways: GOB Chemistry Study Notes

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