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

Question 1

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

Accepted Answer

A dynamic structure where proteins and lipids move freely within a flexible phospholipid bilayer.

Question 2

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

Accepted Answer

Water will move into the cell, causing it to swell and possibly burst.

Question 3

Which of the following is NOT a component of the plasma membrane?

Accepted Answer

Nucleic acids

Question 4

During osmosis, water moves across a membrane from an area of:

Accepted Answer

Low solute concentration to high solute concentration

Question 5

Which equation correctly represents the overall process of 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 6

Which of the following statements about enzymes is TRUE?

Accepted Answer

Enzymes are proteins that lower the activation energy of reactions.

Question 7

A competitive inhibitor affects an enzyme by:

Accepted Answer

Binding to the active site, preventing substrate binding.

Question 8

Which stage of cellular respiration occurs in the cytoplasm and does NOT require oxygen?

Accepted Answer

Glycolysis

Question 9

During aerobic respiration, what is the final electron acceptor in the electron transport chain?

Accepted Answer

O$$_2$$

Question 10

Which of the following best explains why glycolysis is considered evolutionarily 'old'?

Accepted Answer

It occurs in the cytoplasm and does not require oxygen, making it possible in early anaerobic environments.

Question 11

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

Accepted Answer

The cell will shrink as water leaves.

Question 12

Which process involves the movement of molecules from an area of high concentration to low concentration without energy input?

Accepted Answer

Facilitated diffusion

Question 13

Which of the following is a product of the citric acid (Kreb’s) cycle?

Accepted Answer

CO$$_2$$

Question 14

Which of the following best describes chemiosmosis in cellular respiration?

Accepted Answer

The synthesis of ATP using a H$$^+$$ gradient across the mitochondrial membrane.

Question 15

Which of the following is TRUE regarding aerobic and anaerobic respiration?

Accepted Answer

Aerobic respiration produces more ATP than anaerobic respiration.

Question 16

Which of the following is an example of potential energy in a biological system?

Accepted Answer

The chemical bonds in glucose molecules.

Question 17

Which of the following statements about phosphorylation is correct?

Accepted Answer

It is the addition of a phosphate group to a molecule, often activating it.

Question 18

Which factor does NOT affect enzyme functionality?

Accepted Answer

Color of the enzyme

Question 19

During a redox reaction in cellular respiration, what happens to electrons?

Accepted Answer

Electrons are transferred from a reduced molecule to an oxidized molecule.

Question 20

Which process is responsible for the uptake of large particles, such as bacteria, by a cell?

Accepted Answer

Phagocytosis

BIO 110 Exam 3 Study Guide: Membrane Structure, Transport, and Cellular Respiration

Study Guide - Practice Questions