Q: Which of the following is the correct overall chemical equation for aerobic cellular respiration?

$$C_6H_{12}O_6$ + 6\ \mathrm{O}_2 \rightarrow 6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + \text{energy}$$

Question 1

Which of the following best describes an exergonic reaction?

Accepted Answer

A reaction that releases energy and has a negative $$\Delta G$$

Question 2

Which of the following statements about enzymes is TRUE?

Accepted Answer

Enzymes lower the activation energy, allowing reactions to proceed faster

Question 3

Which of the following is the correct overall chemical equation for aerobic cellular respiration?

Accepted Answer

$$C_6H_{12}O_6$ + 6\ \mathrm{O}_2 ightarrow 6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} + 	ext{energy}$$

Question 4

During glucose catabolism, which molecule is oxidized and which is reduced?

Accepted Answer

Glucose is oxidized; oxygen is reduced

Question 5

Which step of glucose catabolism produces the most ATP?

Accepted Answer

Electron transport chain and oxidative phosphorylation

Question 6

What is the primary role of NADH and FADH$$_2 in $$cellular respiration?

Accepted Answer

They transport electrons to the electron transport chain

Question 7

Which protein complex is responsible for generating ATP in the electron transport chain?

Accepted Answer

ATP synthase

Question 8

Which of the following best describes feedback inhibition in metabolic pathways?

Accepted Answer

The end product of a pathway inhibits an enzyme involved early in the pathway

Question 9

Which of the following is TRUE about substrate-level phosphorylation?

Accepted Answer

It directly transfers a phosphate group to ADP from a phosphorylated substrate

Question 10

Which of the following is the correct overall chemical equation for photosynthesis?

Accepted Answer

$$6\ \mathrm{CO}_2 + 6\ \mathrm{H}_2\mathrm{O} \rightarrow C_6H_{12}O_6$ + 6\ \mathrm{O}_2$$

Question 11

In photosynthesis, which molecule is oxidized and which is reduced?

Accepted Answer

Water is oxidized; carbon dioxide is reduced

Question 12

Which pigment is primarily responsible for absorbing light in the blue and red wavelengths and reflecting green?

Accepted Answer

Chlorophyll a

Question 13

A red blood cell is placed in a hypotonic solution. What will happen to the cell?

Accepted Answer

It will swell and may burst due to water entering the cell

Question 14

Which of the following best describes facilitated diffusion?

Accepted Answer

Passive movement of molecules down their concentration gradient via a protein channel

Question 15

Which process requires energy input from ATP to move substances across the cell membrane?

Accepted Answer

Active transport

Question 16

A plant cell is placed in a hypertonic solution. What is the most likely outcome?

Accepted Answer

The cell will lose water and undergo plasmolysis

Question 17

Which of the following is a difference between endocytosis and exocytosis?

Accepted Answer

Endocytosis moves substances into the cell; exocytosis moves substances out of the cell

Question 18

Which statement best describes the second law of thermodynamics as it applies to biological systems?

Accepted Answer

Energy transformations increase the disorder (entropy) of the universe

Question 19

Which of the following is an example of catabolism?

Accepted Answer

Breakdown of glucose during glycolysis

Question 20

A patient is unable to produce sufficient ATP due to a defect in the electron transport chain. Which step of glucose catabolism is most directly affected?

Accepted Answer

Oxidative phosphorylation

Study Guide: Cellular Respiration, Photosynthesis, Cell Transport, and Cell Signaling

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