Q: Which of the following is the correct overall chemical equation for aerobic glucose metabolism in human cells?

$$C_6H_{12}O_6$ + 6O_2 \rightarrow 6H_2O + 6CO_2 + 38 \text{ATP} + \text{heat}$$

Question 1

Which of the following is the correct overall chemical equation for aerobic glucose metabolism in human cells?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6H_2O + 6CO_2 + 38 	ext{ATP} + 	ext{heat}$$

Question 2

During glycolysis, what is the net gain of ATP molecules per molecule of glucose?

Accepted Answer

$$2 	ext{ATP}$$

Question 3

Which metabolic pathway is responsible for converting fatty acids into acetyl-CoA for entry into the Krebs cycle?

Accepted Answer

Beta oxidation

Question 4

What is the primary function of the electron transport chain in cellular respiration?

Accepted Answer

To generate ATP via oxidative phosphorylation

Question 5

Which shuttle system results in the production of 3 ATP per NADH generated in the cytosol during glycolysis?

Accepted Answer

Malate shuttle

Question 6

A patient presents with muscle pain and fatigue after intense exercise. Blood tests reveal elevated lactic acid. Which metabolic pathway is most likely responsible for this condition?

Accepted Answer

Anaerobic glycolysis

Question 7

Which process describes the formation of glucose from non-carbohydrate precursors in the liver or kidney?

Accepted Answer

Gluconeogenesis

Question 8

In the Krebs cycle, which molecule is regenerated to continue the cycle after each turn?

Accepted Answer

Oxaloacetic acid

Question 9

Which coenzyme is primarily responsible for transporting high-energy electrons to the electron transport chain?

Accepted Answer

NADH

Question 10

What is the net ATP yield from one molecule of glucose after complete aerobic metabolism in most human cells?

Accepted Answer

$$38 	ext{ATP}$$

Question 11

Which process is responsible for the breakdown of triglycerides into glycerol and fatty acids?

Accepted Answer

Lipolysis

Question 12

Which shuttle system results in the production of only 2 ATP per NADH generated in the cytosol during glycolysis?

Accepted Answer

Glycerol phosphate shuttle

Question 13

During substrate-level phosphorylation, ATP is produced directly from which process?

Accepted Answer

Transfer of a phosphate group from a substrate to ADP

Question 14

Which metabolic pathway is utilized by the liver to convert lactic acid back into glucose?

Accepted Answer

Cori cycle

Question 15

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

Accepted Answer

Oxygen ($$O_2)$$

Question 16

If a cell is deprived of oxygen, which process will be inhibited first?

Accepted Answer

Electron transport chain

Question 17

Which of the following is a direct product of glycolysis?

Accepted Answer

Pyruvic acid

Question 18

Which process is responsible for the conversion of pyruvic acid to acetyl-CoA?

Accepted Answer

Bridge or transition step

Question 19

Which organ is primarily responsible for gluconeogenesis during periods of fasting?

Accepted Answer

Liver

Question 20

Which of the following statements best describes oxidative phosphorylation?

Accepted Answer

ATP is produced as H$$^+$$ ions diffuse into the mitochondrial matrix through ATP synthase

Glucose and Carbohydrate Metabolism: Pathways and Regulation

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