Question 1

Which of the following best describes the difference between a covalent bond and an ionic bond?

Accepted Answer

A covalent bond involves the sharing of electrons, while an ionic bond involves the transfer of electrons.

Question 2

Given the atomic number of oxygen is 8, how many electrons are present in a neutral oxygen atom?

Accepted Answer

$$8$$

Question 3

Which property of water allows insects to walk on its surface?

Accepted Answer

Surface tension

Question 4

What is the molar mass of glucose ($$C_6H_{12}O_6$)? (Atomic masses: C = 12, H = 1, O = 16)

Accepted Answer

$$180\ g/mol$$

Question 5

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

Accepted Answer

Storing genetic information

Question 6

Which macromolecule is primarily responsible for storing genetic information?

Accepted Answer

DNA

Question 7

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

Accepted Answer

Water is polar and can surround and separate positive and negative ions.

Question 8

Which of the following statements about ATP (adenosine triphosphate) is correct?

Accepted Answer

ATP is the energy currency of the cell.

Question 9

A buffer solution is important in biological systems because it:

Accepted Answer

Maintains a stable pH by neutralizing acids and bases.

Question 10

Which of the following is a correct statement about the structure of DNA?

Accepted Answer

DNA is a double-stranded helix composed of nucleotides.

Question 11

Which of the following best describes the difference between saturated and unsaturated fatty acids?

Accepted Answer

Unsaturated fatty acids have one or more double bonds, while saturated fatty acids have none.

Question 12

Which of the following is an example of a polysaccharide?

Accepted Answer

Starch

Question 13

Which functional group is found in amino acids and is responsible for their acidic properties?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 14

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy of reactions.

Question 15

Which property of water is most important for the transport of nutrients in plants?

Accepted Answer

Cohesion and adhesion

Question 16

Which of the following is true about the difference between DNA and RNA?

Accepted Answer

DNA is double-stranded, while RNA is usually single-stranded.

Question 17

Which of the following best describes a dehydration reaction?

Accepted Answer

A reaction that joins monomers to form polymers by removing water.

Question 18

Which of the following is a correct statement about isomers?

Accepted Answer

Isomers have the same molecular formula but different structural arrangements.

Question 19

Which of the following is a correct application of the periodic table to determine the number of neutrons in an atom?

Accepted Answer

Subtract the atomic number from the atomic mass.

Question 20

Which of the following best explains why ice floats on water?

Accepted Answer

Ice is less dense than liquid water because its molecules form a crystalline structure.

Study Guide: Foundations of General Biology (Chapters 2, 3, 4, and 5)

Study Guide - Practice Questions