Question 1

Which of the following statements best describes a covalent bond?

Accepted Answer

It is formed when atoms share electrons equally, resulting in a nonpolar molecule.

Question 2

Water has a high specific heat. What is the biological significance of this property?

Accepted Answer

It allows organisms to maintain stable internal temperatures despite environmental changes.

Question 3

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

Accepted Answer

It synthesizes proteins for the cell.

Question 4

A solution with a pH of 5 is considered:

Accepted Answer

Acidic

Question 5

Which macromolecule is primarily responsible for storing genetic information?

Accepted Answer

Nucleic acids

Question 6

Which process describes the breakdown of glucose in the presence of oxygen to yield ATP?

Accepted Answer

Cellular respiration

Question 7

What is the main function of ribosomes in the cell?

Accepted Answer

Protein synthesis

Question 8

Which of the following best explains why phospholipids form bilayers in water?

Accepted Answer

They have hydrophilic heads and hydrophobic tails.

Question 9

Which equation correctly represents the dehydration synthesis of two monosaccharides?

Accepted Answer

$$C_6H_{12}O_6$ + C_6H_{12}O_6$ \rightarrow C$$_{12}$$H_{22}O$$_{11} + H_2O$

Question 10

Which organelle is responsible for packaging and shipping proteins within the cell?

Accepted Answer

Golgi apparatus

Question 11

A patient is suffering from muscle cramps due to dehydration. Which property of water is most directly related to this condition?

Accepted Answer

Water acts as a solvent, dissolving ions necessary for muscle function.

Question 12

Which of the following is a correct statement about enzymes?

Accepted Answer

Enzymes lower the activation energy required for biochemical reactions.

Question 13

Which of the following best describes the function of ATP in the cell?

Accepted Answer

It serves as the universal energy source for cellular activities.

Question 14

Which type of tissue is responsible for transmitting electrical impulses in the human body?

Accepted Answer

Nervous tissue

Question 15

Which of the following is a function of the skeletal system?

Accepted Answer

Mineral and fat storage

Question 16

Which of the following best explains why small cells are more efficient than large cells?

Accepted Answer

They have a higher surface area to volume ratio, allowing for efficient exchange of nutrients and waste.

Question 17

Which of the following is a correct description of isotonic extracellular fluid?

Accepted Answer

It has equal solute concentrations inside and outside the cell, maintaining cell volume.

Question 18

Which of the following is the smallest contractile unit in a muscle fiber?

Accepted Answer

Sarcomere

Question 19

Which of the following is a function of the skin?

Accepted Answer

Protection against dehydration and pathogens

General Biology Study Notes: Chemistry of Life, Cells, Organ Systems, Skeletal and Muscular Systems

Study Guide - Practice Questions