Question 1

Which of the following best describes the role of the plasma membrane in maintaining cellular homeostasis?

Accepted Answer

It selectively regulates the movement of substances in and out of the cell, maintaining internal balance.

Question 2

During cellular respiration, which stage produces the greatest number of ATP molecules per glucose molecule?

Accepted Answer

Oxidative phosphorylation (Electron Transport Chain and Chemiosmosis)

Question 3

A patient is diagnosed with a mitochondrial disorder that impairs the electron transport chain. Which of the following would most likely be observed in their cells?

Accepted Answer

Increased production of lactic acid due to reliance on fermentation

Question 4

Which of the following molecules is most likely to pass through a cell membrane by simple diffusion?

Accepted Answer

Oxygen ($$\mathrm{O_2$})$$

Question 5

Which equation correctly represents the overall process of aerobic cellular respiration?

Accepted Answer

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

Question 6

Which of the following best explains why enzymes are considered biological catalysts?

Accepted Answer

They lower the activation energy, speeding up chemical reactions without being used up.

Question 7

A cell placed in a hypertonic solution will most likely:

Accepted Answer

Lose water and shrink

Question 8

Which of the following statements about carbon is true and explains its central role in the molecular diversity of life?

Accepted Answer

Carbon can form up to four covalent bonds, allowing for complex and diverse molecules.

Question 9

Which process is responsible for the movement of water across a cell membrane from an area of low solute concentration to high solute concentration?

Accepted Answer

Osmosis

Question 10

Which organelle is primarily responsible for ATP production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 11

A mutation causes a cell to produce a nonfunctional sodium-potassium pump. What is the most likely consequence?

Accepted Answer

The cell will be unable to maintain proper ion gradients, affecting nerve impulse transmission.

Question 12

Which of the following is a correct description of the structure of a phospholipid molecule?

Accepted Answer

A hydrophilic head and two hydrophobic tails

Question 13

Which of the following is NOT a function of membrane proteins?

Accepted Answer

Synthesizing DNA

Question 14

Which of the following best describes the difference between fermentation and aerobic respiration?

Accepted Answer

Fermentation produces less ATP and does not use an electron transport chain.

Question 15

Which of the following equations represents the hydrolysis of ATP?

Accepted Answer

$$\mathrm{ATP + H_2O \rightarrow ADP + P_i + Energy}$$

Question 16

Which of the following is a correct statement about the structure and function of the rough endoplasmic reticulum (ER)?

Accepted Answer

It is studded with ribosomes and is involved in protein synthesis.

Question 17

A cell is observed to have a large number of lysosomes. What is the most likely function of this cell?

Accepted Answer

Digestion and recycling of cellular waste

Question 18

Which of the following best explains why water is an excellent solvent for biological molecules?

Accepted Answer

Water can form hydrogen bonds with polar and charged molecules.

Question 19

Which of the following is a correct statement about the relationship between catabolic and anabolic pathways?

Accepted Answer

Catabolic pathways release energy by breaking down molecules, while anabolic pathways consume energy to build molecules.

Overview of General Biology Course Topics and Assessments

Study Guide - Practice Questions

Study Guide - Flashcards