Q: Which of the following equations correctly represents the oxidation of glucose during cellular respiration?

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

Question 1

Which of the following best describes the main function of cellular respiration in living cells?

Accepted Answer

To convert the energy stored in the covalent bonds of sugars, fats, and proteins into ATP.

Question 2

Which of the following is NOT a stage of cellular respiration?

Accepted Answer

Photosynthesis

Question 3

A patient is diagnosed with a rare disorder that prevents their cells from using oxygen as the final electron acceptor. Which process will their cells rely on to generate ATP?

Accepted Answer

Fermentation

Question 4

Which of the following molecules can be metabolized by glycolysis reactions?

Accepted Answer

Glucose

Question 5

Which of the following statements about polysaccharides is correct?

Accepted Answer

Glycogen is a polysaccharide produced in animal cells for energy storage.

Question 6

Which of the following best explains how glucose enters a cell when its concentration is higher outside the cell than inside?

Accepted Answer

Facilitated diffusion via a carrier protein

Question 7

Which of the following is a correct description of a glycosidic linkage?

Accepted Answer

A covalent bond between two monosaccharides formed by a dehydration reaction.

Question 8

A person consumes a supplement high in niacin (vitamin B3). How does this affect cellular metabolism?

Accepted Answer

Niacin is converted to NAD$$^+$$, which accepts electrons during metabolic reactions.

Question 9

Which of the following best describes the role of NAD$$^+ in $$cellular respiration?

Accepted Answer

It acts as an electron carrier, accepting electrons during oxidation reactions.

Question 10

Which of the following equations correctly represents the oxidation of glucose during cellular respiration?

Accepted Answer

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

Question 11

Which of the following is a correct match between a molecule and its function in cellular respiration?

Accepted Answer

FAD: Electron carrier that is reduced to FADH$$_2$$ during the citric acid cycle.

Question 12

Which of the following statements about catabolism is correct?

Accepted Answer

Catabolism involves breaking down molecules and releasing energy.

Question 13

A mutation prevents the formation of glycosidic linkages in a plant. Which of the following would most likely be affected?

Accepted Answer

The plant's ability to store energy as starch.

Question 14

Which of the following best explains why fats can be used as metabolic fuel in cellular respiration?

Accepted Answer

Glycerol and fatty acids from fats can enter cellular respiration as reactants.

Question 15

Which of the following is a correct statement about the function of polysaccharides in living organisms?

Accepted Answer

Polysaccharides such as starch and glycogen serve as energy storage molecules.

Question 16

Which of the following best describes the difference between NAD$$^+$$ and NADH?

Accepted Answer

NAD$$^+ is $$the oxidized form, while NADH is the reduced form.

Question 17

A scientist is studying a new drug that blocks the function of carrier proteins in the plasma membrane. Which process would be directly affected?

Accepted Answer

Facilitated diffusion of glucose into the cell

Question 18

Which of the following best describes the process of oxidation in cellular respiration?

Accepted Answer

Loss of electrons from a molecule

Question 19

Which of the following is a real-life example of the importance of electron carriers in metabolism?

Accepted Answer

A deficiency in niacin (vitamin B3) can lead to reduced NAD$$^+$$ levels, impairing energy production in cells.

Cellular Respiration: Fuels and Pathways (Chapters 5 & 9)

Guida di studio - Domande di pratica

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