Question 1

Which of the following best describes the subatomic particles of an atom?

Accepted Answer

Protons, neutrons, and electrons, each with distinct charges and locations within the atom.

Question 2

What does the atomic number of an element represent?

Accepted Answer

The number of protons in the nucleus of an atom.

Question 3

Valence electrons are important because they:

Accepted Answer

Determine the chemical reactivity and bonding properties of an atom.

Question 4

Which of the following best describes a polar molecule?

Accepted Answer

A molecule with an uneven distribution of charge due to differences in electronegativity.

Question 5

A dehydration synthesis reaction is characterized by:

Accepted Answer

The removal of a water molecule to join two smaller molecules into a larger one.

Question 6

Which equation correctly represents the calculation of pH?

Accepted Answer

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

Question 7

A nucleotide is made up of which three components?

Accepted Answer

A phosphate group, a pentose sugar, and a nitrogenous base.

Question 8

Which of the following makes a compound inorganic?

Accepted Answer

It does not contain both carbon and hydrogen atoms.

Question 9

Isotopes of an element differ in:

Accepted Answer

The number of neutrons in the nucleus.

Question 10

Which of the following is NOT a type of carbohydrate?

Accepted Answer

Triglyceride

Question 11

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

Accepted Answer

A molecule composed of one glycerol and three fatty acids.

Question 12

In DNA, which bases are complementary pairs?

Accepted Answer

Adenine with Thymine, and Guanine with Cytosine.

Question 13

How are saturated fats different from unsaturated fats?

Accepted Answer

Saturated fats have no double bonds between carbon atoms, while unsaturated fats have one or more double bonds.

Question 14

Which vitamin is produced in the skin upon exposure to sunlight?

Accepted Answer

Vitamin D

Question 15

What are the building blocks of proteins?

Accepted Answer

Amino acids

Question 16

Which of the following is a function of enzymes in biological systems?

Accepted Answer

They act as catalysts to speed up chemical reactions without being consumed.

Question 17

Hydrogen bonds in water molecules are responsible for which property?

Accepted Answer

High surface tension

Question 18

Where are electrons and protons located in an atom?

Accepted Answer

Protons are in the nucleus; electrons are in orbitals surrounding the nucleus.

Question 19

Which of the following is a multi-step process involving dehydration synthesis in the formation of a protein?

Accepted Answer

Amino acids are joined by peptide bonds, each formed by the removal of a water molecule, resulting in a polypeptide chain.

Question 20

A weak acid and a weak base are mixed in water. Which equation best describes the relationship between their concentrations at equilibrium?

Accepted Answer

$$K_a 	imes K_b = K_w$$

Fundamental Concepts in Anatomy & Physiology: Atomic Structure, Biochemistry, and Macromolecules

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