Question 1

Which of the following best describes the fluid mosaic model of the plasma membrane?

Accepted Answer

A dynamic structure with proteins embedded in or attached to a flexible phospholipid bilayer.

Question 2

A red blood cell placed in a hypotonic solution will:

Accepted Answer

Burst as water enters the cell by osmosis.

Question 3

Which molecule can pass most easily through the plasma membrane without assistance?

Accepted Answer

O$$_2$$

Question 4

The sodium-potassium pump is an example of:

Accepted Answer

Active transport

Question 5

Which of the following is true regarding ATP hydrolysis?

Accepted Answer

It releases energy that can be used to drive cellular processes.

Question 6

A competitive inhibitor of an enzyme works by:

Accepted Answer

Binding to the active site and preventing substrate binding.

Question 7

Which equation correctly represents cellular respiration?

Accepted Answer

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

Question 8

During glycolysis, which of the following occurs?

Accepted Answer

ATP is produced by substrate-level phosphorylation.

Question 9

Which stage of cellular respiration produces the most ATP?

Accepted Answer

Oxidative phosphorylation

Question 10

In lactic acid fermentation, which molecule is regenerated to allow glycolysis to continue?

Accepted Answer

NAD$$^+$$

Question 11

Which of the following best describes the role of NADH and FADH$$_2 in $$cellular respiration?

Accepted Answer

They carry electrons to the electron transport chain.

Question 12

Which equation correctly represents photosynthesis?

Accepted Answer

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

Question 13

Which structure in the chloroplast is the site of the light reactions?

Accepted Answer

Thylakoid membrane

Question 14

C$$_4$$ plants and CAM plants both minimize photorespiration. What is the main difference between them?

Accepted Answer

C$$_4$$ plants separate carbon fixation and the Calvin cycle by space; CAM plants separate them by time.

Question 15

Which phase of the Calvin cycle involves the incorporation of CO$$_2$$ into organic molecules?

Accepted Answer

Carbon fixation

Question 16

A plant cell placed in a hypertonic solution will:

Accepted Answer

Undergo plasmolysis as water leaves the cell.

Question 17

Which of the following is an example of bulk transport?

Accepted Answer

Exocytosis of neurotransmitters

Question 18

If a cell is placed in an isotonic solution, what will happen to the cell?

Accepted Answer

There will be no net movement of water.

Question 19

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy barrier.

Question 20

A patient is diagnosed with a genetic disorder that affects the function of carrier proteins in the cell membrane. Which process is most likely to be impaired?

Accepted Answer

Facilitated diffusion of glucose

BIO 101 Exam 2 Study Guide: Membrane Structure, Metabolism, Cellular Respiration, and Photosynthesis

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