Question 1

Which of the following atoms is NOT one of the four major components of biomolecules?

Accepted Answer

Sodium

Question 2

Which statement best describes the role of valence electrons in chemical bonding?

Accepted Answer

Valence electrons are the only electrons involved in chemical reactions.

Question 3

Given the electronegativities: oxygen (3.5), nitrogen (3.0), hydrogen (2.1), and carbon (2.5), which bond is most polar?

Accepted Answer

O-H

Question 4

Which of the following best explains why water is a good solvent for ionic compounds?

Accepted Answer

Water's polarity allows it to surround and separate ions.

Question 5

A molecule with the formula $$C_{16}H$$_{32}$$O_2 is $$most likely a:

Accepted Answer

Saturated fatty acid

Question 6

Which of the following functional groups is correctly matched with its structure?

Accepted Answer

Hydroxyl group: $$-OH$$

Question 7

Which process involves the breaking of a polymer into monomers by adding water?

Accepted Answer

Hydrolysis reaction

Question 8

If a carbon atom forms four single covalent bonds, what is the geometry around the carbon atom?

Accepted Answer

Tetrahedral

Question 9

Which of the following best describes a hydrogen bond?

Accepted Answer

A bond between a hydrogen atom with a partial positive charge and an electronegative atom.

Question 10

Which of the following statements about phospholipids is correct?

Accepted Answer

They self-assemble into bilayers with hydrophilic heads facing outward.

Question 11

Which of the following is a property of saturated fatty acids?

Accepted Answer

They have only single bonds between carbon atoms.

Question 12

Which of the following best explains why nonpolar molecules do not dissolve well in water?

Accepted Answer

Nonpolar molecules cannot form favorable interactions with water's polar molecules.

Question 13

Which of the following is the correct order of increasing electronegativity for the atoms: carbon, nitrogen, oxygen, hydrogen?

Accepted Answer

Hydrogen \u003c Carbon \u003c Nitrogen \u003c Oxygen

Question 14

Which of the following best describes a dehydration reaction?

Accepted Answer

A reaction that removes water to form a bond between monomers.

Question 15

A molecule with a polar region and a nonpolar region is described as:

Accepted Answer

Amphipathic

Question 16

Which of the following is a correct statement about ionic bonds?

Accepted Answer

Ionic bonds form between oppositely charged ions.

Question 17

Which of the following functional groups is found in all amino acids?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 18

Which of the following best explains why saturated fats are solid at room temperature?

Accepted Answer

They have straight chains that pack closely together.

Question 19

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

Accepted Answer

A single, basic building block of a larger molecule.

Question 20

Which of the following best describes the relationship between hydrogen bonds and water's properties?

Accepted Answer

Hydrogen bonds are responsible for water's high boiling point.

Atoms, Chemical Bonds, and Biomolecules: Foundations for General Biology

Study Guide - Practice Questions