Q: Which of the following equations correctly represents the overall chemical reaction for cellular respiration?

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

Question 1

Which of the following best describes what happens to NAD+ during glycolysis?

Accepted Answer

NAD+ is reduced to NADH by gaining electrons.

Question 2

During aerobic respiration, which sequence correctly lists the stages in order?

Accepted Answer

Glycolysis → Krebs cycle → Electron transport chain

Question 3

Which of the following equations correctly represents the overall chemical reaction 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 4

In the process of chemiosmosis during cellular respiration, what is the direction of proton (H+) flow through ATP synthase?

Accepted Answer

From the intermembrane space to the mitochondrial matrix

Question 5

Which of the following statements about substrate-level phosphorylation is correct?

Accepted Answer

It directly transfers a phosphate group from a substrate to ADP to form ATP.

Question 6

During the light reactions of photosynthesis, what is the primary electron donor to the electron transport chain?

Accepted Answer

Water ($$ \mathrm{H_2O} )$$

Question 7

Which molecule is oxidized and which is reduced during photosynthesis?

Accepted Answer

Water is oxidized and carbon dioxide is reduced.

Question 8

How many net ATP molecules are produced per molecule of glucose during glycolysis?

Accepted Answer

2

Question 9

Which of the following best describes the role of NADH in cellular respiration?

Accepted Answer

It carries high-energy electrons to the electron transport chain.

Question 10

A patient is diagnosed with a mitochondrial disorder that impairs the electron transport chain. Which process would be most directly affected?

Accepted Answer

Oxidative phosphorylation

Question 11

Which of the following is a correct description of the thylakoid membrane's role in photosynthesis?

Accepted Answer

It houses the electron transport chain and ATP synthase for the light reactions.

Question 12

During the Krebs cycle, which of the following is a direct product per turn of the cycle?

Accepted Answer

1 ATP (or GTP), 3 NADH, 1 FADH$$_2$$, and 2 CO$$_2$$

Question 13

Which of the following best explains why oxygen is required for aerobic respiration?

Accepted Answer

Oxygen acts as the final electron acceptor in the electron transport chain.

Question 14

In photosynthesis, which of the following is a correct representation of the overall chemical reaction?

Accepted Answer

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

Question 15

A scientist measures the ATP yield from one molecule of glucose in a eukaryotic cell. Most of the ATP is produced by which process?

Accepted Answer

Oxidative phosphorylation via the electron transport chain

Question 16

Which of the following statements about the stroma of the chloroplast is correct?

Accepted Answer

It is the site of the Calvin cycle (dark reactions).

Question 17

If a plant is exposed to a chemical that blocks the movement of protons (H+) across the thylakoid membrane, what is the most immediate effect on photosynthesis?

Accepted Answer

ATP synthesis in the chloroplast will decrease.

Question 18

Which of the following best describes the relationship between oxidation and reduction in biological systems?

Accepted Answer

Oxidation is the loss of electrons, while reduction is the gain of electrons.

Question 19

During the light reactions of photosynthesis, what is the fate of the electrons that are excited by light energy in photosystem II?

Accepted Answer

They are transferred through an electron transport chain to photosystem I.

Cellular Respiration and Photosynthesis: Study Guide (Chapters 7-10)

Guida di studio - Domande di pratica

Study guide - Flashcard