$$\text{Atomic mass} = \text{Number of protons} + \text{Number of neutrons}$$

Question 1

Which subatomic particle determines the atomic number of an element?

Accepted Answer

Proton

Question 2

Which of the following best describes an ionic bond?

Accepted Answer

A bond formed by the transfer of electrons from one atom to another

Question 3

Which equation correctly represents the synthesis reaction of glucose from carbon dioxide and water?

Accepted Answer

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

Question 4

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

Accepted Answer

Providing a readily available energy source

Question 5

Which of the following best explains why water is considered a polar molecule?

Accepted Answer

It has a partial positive charge on hydrogen and a partial negative charge on oxygen

Question 6

Which of the following is the correct formula for calculating the atomic mass of an atom?

Accepted Answer

$$	ext{Atomic mass} = 	ext{Number of protons} + 	ext{Number of neutrons}$$

Question 7

Which process breaks down polymers into monomers by adding water?

Accepted Answer

Hydrolysis

Question 8

Which of the following best describes the role of enzymes in biological reactions?

Accepted Answer

They speed up reactions by lowering the activation energy

Question 9

Which of the following is a characteristic of a saturated fatty acid?

Accepted Answer

Has only single bonds between carbon atoms

Question 10

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

Accepted Answer

The sequence of amino acids in a polypeptide chain

Question 11

Which of the following is a correct statement about DNA and RNA?

Accepted Answer

DNA is double-stranded, while RNA is usually single-stranded

Question 12

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

Accepted Answer

It provides energy for cellular processes

Question 13

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

Accepted Answer

It is a major component of cell membranes

Question 14

Which of the following best explains why enzymes are specific to their substrates?

Accepted Answer

Enzymes have active sites with unique shapes that fit specific substrates

Question 15

Which of the following is a correct statement about the pH scale?

Accepted Answer

A solution with pH 7 is neutral

Question 16

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

Accepted Answer

The overall three-dimensional shape of the protein

Question 17

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

Accepted Answer

Providing insulation and energy storage

Question 18

Which of the following best describes a dehydration synthesis reaction?

Accepted Answer

A reaction that joins monomers to form polymers by removing water

Question 19

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

Accepted Answer

They store and transmit genetic information

Question 20

Which of the following best describes the role of buffers in biological systems?

Accepted Answer

They maintain a stable pH by neutralizing acids and bases

Chapter 2: Chemistry Comes Alive – Study Notes for Anatomy & Physiology

Study Guide - Practice Questions