Question 1

Which of the following best explains why biochemistry is fundamental to the study of anatomy and physiology?

Accepted Answer

It describes the chemical reactions and molecules essential for life processes.

Question 2

Which element is found in all proteins but not in carbohydrates or lipids?

Accepted Answer

Nitrogen

Question 3

A neutral atom of carbon has 6 protons, 6 neutrons, and 6 electrons. What is its atomic mass in atomic mass units (amu)?

Accepted Answer

$$12$$

Question 4

Which statement about isotopes is correct?

Accepted Answer

Isotopes have different numbers of neutrons.

Question 5

Which of the following best describes a compound?

Accepted Answer

A molecule made of two or more different kinds of atoms chemically bonded together.

Question 6

According to the octet rule, atoms tend to react in order to achieve how many electrons in their valence shell?

Accepted Answer

$$8$$

Question 7

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

Accepted Answer

Covalent bond

Question 8

A sodium atom ($$Na) $$loses one electron to become $$Na^+. $$What type of ion is $$Na^+$$?

Accepted Answer

Cation

Question 9

Which property of water allows it to absorb and release heat with little temperature change, helping to maintain body temperature?

Accepted Answer

High heat capacity

Question 10

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

Accepted Answer

They dissociate into electrolytes that help conduct electrical currents.

Question 11

Which of the following best describes a buffer in the context of body fluids?

Accepted Answer

A substance that resists changes in pH by accepting or donating protons.

Question 12

Which of the following is a monosaccharide found in blood and is the primary energy source for cells?

Accepted Answer

Glucose

Question 13

Which of the following is the storage form of carbohydrate in animals?

Accepted Answer

Glycogen

Question 14

Which type of fatty acid contains one or more double bonds and is typically liquid at room temperature?

Accepted Answer

Unsaturated fatty acid

Question 15

Phospholipids are important in cell membrane structure because:

Accepted Answer

They have both hydrophilic and hydrophobic regions.

Question 16

Which molecule is the basis for all steroids formed in the body?

Accepted Answer

Cholesterol

Question 17

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

Accepted Answer

Genetic information storage

Question 18

What type of bond links amino acids together in a protein?

Accepted Answer

Peptide bond

Question 19

Which level of protein structure is characterized by alpha helices and beta sheets stabilized by hydrogen bonds?

Accepted Answer

Secondary structure

Question 20

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy required for reactions.

Biochemistry Foundations for Anatomy & Physiology

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