Question 1

Which of the following best describes the difference between potential energy and kinetic energy in the human body?

Accepted Answer

Potential energy is stored in chemical bonds, while kinetic energy is the energy of motion, such as muscle contraction.

Question 2

Which statement correctly defines a chemical element?

Accepted Answer

A chemical element is a substance that cannot be broken down into simpler substances by ordinary chemical means.

Question 3

Which of the following is the correct formula for calculating pH?

Accepted Answer

$$\mathrm{pH} = -\log_{10}[\mathrm{H}^+]$$

Question 4

A patient is given a solution containing sodium chloride (NaCl) in water. Which type of mixture is this?

Accepted Answer

Solution

Question 5

Which of the following best describes the difference between a molecule and a compound?

Accepted Answer

A molecule is formed when two or more atoms join together, while a compound is a molecule that contains atoms of different elements.

Question 6

Which type of chemical bond involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Question 7

Which of the following is a synthesis reaction?

Accepted Answer

$$\mathrm{A} + \mathrm{B} \rightarrow \mathrm{AB}$$

Question 8

Which of the following best explains why water is important for body homeostasis?

Accepted Answer

Water acts as a solvent, helps regulate temperature, and is involved in chemical reactions.

Question 9

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

Accepted Answer

Provide an easily used energy source for cells

Question 10

A solution has a hydrogen ion concentration of $$1 	imes 10$$^{-4}$$ M. What is its pH?

Accepted Answer

$$4$$

Question 11

Which of the following best describes the role of ATP in cell metabolism?

Accepted Answer

ATP transfers energy to other compounds, enabling cellular work.

Question 12

Which of the following is NOT a function of lipids in the human body?

Accepted Answer

Catalyzing chemical reactions

Question 13

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

DNA contains deoxyribose and stores genetic information; RNA contains ribose and helps express genetic information.

Question 14

Which of the following is a decomposition reaction?

Accepted Answer

$$\mathrm{AB} \rightarrow \mathrm{A} + \mathrm{B}$$

Question 15

Which of the following is a property of a suspension?

Accepted Answer

Particles settle out over time and can be separated by filtration.

Question 16

Which of the following is true about ionic bonds?

Accepted Answer

Ionic bonds form when electrons are transferred from one atom to another.

Question 17

Which of the following is a real-life example of a hydrogen bond?

Accepted Answer

The attraction between water molecules in liquid water

Question 18

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

Accepted Answer

Enzymes lower the activation energy, increasing the rate of chemical reactions.

Question 19

Which of the following is a major factor that affects the rate of chemical reactions in the body?

Accepted Answer

Temperature

Question 20

Which of the following best describes a colloid?

Accepted Answer

A mixture where particles are dispersed but do not settle out, such as cytoplasm

A&P Chapter 2 Study Guide

Guida di studio - Domande di pratica