Question 1

Which of the following best describes the correct order of the levels of organization in the human body, from simplest to most complex?

Accepted Answer

Chemical, Cellular, Tissue, Organ, Organ System, Organism

Question 2

Which subatomic particle determines the atomic number of an element?

Accepted Answer

Proton

Question 3

If an atom has 6 protons, 6 neutrons, and 6 electrons, what is its atomic mass?

Accepted Answer

$$12$$

Question 4

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 5

What type of bond is formed when one atom donates an electron to another atom, resulting in oppositely charged ions that attract each other?

Accepted Answer

Ionic bond

Question 6

Which property of water allows it to dissolve more substances than any other liquid?

Accepted Answer

Its polar covalent bonds

Question 7

A solution with a pH of 4 has how many times more hydrogen ions ($$[H^+]) $$than a solution with a pH of 7?

Accepted Answer

$$1000$$ times

Question 8

Which of the following best describes a dehydration synthesis reaction?

Accepted Answer

A reaction that forms a new bond by removing a water molecule

Question 9

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

Accepted Answer

Catalyzing chemical reactions

Question 10

Which of the following best explains why water is less dense as a solid (ice) than as a liquid?

Accepted Answer

Hydrogen bonds hold water molecules farther apart in ice than in liquid water.

Question 11

Which of the following is true about enzymes?

Accepted Answer

They lower the activation energy required for a reaction.

Question 12

A molecule of sodium chloride (NaCl) dissolves in water. What happens to the ions?

Accepted Answer

Na+ ions are surrounded by the negative poles of water molecules, and Cl- ions are surrounded by the positive poles.

Question 13

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

Accepted Answer

A molecule is made of two or more atoms held together by covalent bonds; a compound is made of two or more different elements in a fixed proportion.

Question 14

Which of the following is a trace element in the human body that acts as a cofactor for enzymes?

Accepted Answer

Zinc

Question 15

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

Accepted Answer

It stores and transfers energy for cellular processes.

Question 16

A patient’s blood pH drops to 7.1. What is the most likely physiological consequence?

Accepted Answer

Coma due to acidosis

Question 17

Which of the following best describes a buffer’s function in the human body?

Accepted Answer

Buffers stabilize pH by removing or replacing hydrogen ions.

Question 18

Which of the following is a property of lipids that distinguishes them from carbohydrates?

Accepted Answer

Lipids are generally insoluble in water.

Question 19

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

Accepted Answer

The interaction between multiple polypeptide chains to form a protein complex

Question 20

Which of the following is true about nucleic acids?

Accepted Answer

They store and transfer genetic information.

The Chemical Level of Organization: Foundations for Anatomy & Physiology

Study Guide - Practice Questions