Question 1

Which of the following best describes the difference between an ionic and a covalent bond?

Accepted Answer

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Question 2

A neutral atom of carbon has 6 protons, 6 neutrons, and 6 electrons. If it loses two electrons, what is its resulting charge?

Accepted Answer

$$+2$$

Question 3

Which property of water is MOST important for maintaining body temperature homeostasis?

Accepted Answer

Water's high heat capacity

Question 4

Which of the following is a correct representation of a decomposition reaction?

Accepted Answer

$$AB \rightarrow A + B$$

Question 5

What is the molecular weight of water ($$H_2O$$)? (Atomic weights: H = 1, O = 16)

Accepted Answer

$$18$$

Question 6

Which of the following best explains why ice floats on water?

Accepted Answer

Ice is less dense than liquid water because hydrogen bonds hold water molecules farther apart in the solid state.

Question 7

Which of the following is NOT a function of proteins in the body?

Accepted Answer

Storing genetic information

Question 8

A buffer system in the blood helps maintain pH by:

Accepted Answer

Minimizing changes in pH by accepting or donating hydrogen ions

Question 9

Which of the following statements about enzymes is TRUE?

Accepted Answer

Enzymes lower the activation energy required for a reaction.

Question 10

Which of the following best describes the quaternary structure of a protein?

Accepted Answer

The arrangement of multiple polypeptide chains into a functional protein

Question 11

Which of the following molecules is a polysaccharide?

Accepted Answer

Glycogen

Question 12

What is the main function of ATP in cells?

Accepted Answer

Providing energy for cellular processes

Question 13

Which of the following is TRUE about the pH scale?

Accepted Answer

A solution with pH 7 is neutral.

Question 14

Which of the following is a correct example of a synthesis reaction?

Accepted Answer

$$A + B \rightarrow AB$$

Question 15

Which of the following is a property of water that is critical for physiological systems?

Accepted Answer

Water has a high heat capacity, helping regulate body temperature.

Question 16

Which of the following best describes the role of phospholipids in the body?

Accepted Answer

They form the main structural component of cell membranes.

Question 17

Which of the following is a correct statement about nucleic acids?

Accepted Answer

DNA contains deoxyribose sugar, while RNA contains ribose sugar.

Question 18

Which of the following is a function of lipids in the body?

Accepted Answer

Forming cell membranes and storing energy

Question 19

Which of the following is TRUE about hydrogen bonds in water?

Accepted Answer

Hydrogen bonds cause water to have a high surface tension.

Question 20

Which of the following best describes the primary structure of a protein?

Accepted Answer

The sequence of amino acids in a polypeptide chain

Chemical Level of Organization: Study Notes for Anatomy & Physiology

Study Guide - Practice Questions