Question 1

Which of the following best describes a hydrogen bond?

Accepted Answer

A weak attraction between a hydrogen atom and an electronegative atom, such as oxygen or nitrogen.

Question 2

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

Accepted Answer

Carboxyl group

Question 3

A triglyceride is formed by the combination of which molecules?

Accepted Answer

Three fatty acids and one glycerol

Question 4

Which of the following is NOT a polymer?

Accepted Answer

Lipid

Question 5

Which equation correctly represents the formation of a disaccharide from two monosaccharides?

Accepted Answer

$$C_6H_{12}O_6$ + C_6H_{12}O_6$ \rightarrow C$$_{12}$$H_{22}O$$_{11} + H_2O$

Question 6

Which molecule contains a nitrogenous base, a phosphate group, and a pentose sugar?

Accepted Answer

Nucleotide

Question 7

Which of the following best explains why lipids are considered macromolecules but not polymers?

Accepted Answer

Lipids are large molecules assembled from smaller components, but they are not formed by repetitive linking of identical monomers.

Question 8

Which organelle is most likely defective in Tay-Sachs disease, leading to the accumulation of undigested lipids?

Accepted Answer

Lysosome

Question 9

Which of the following molecules is most likely to be found in the cell membrane and is responsible for its fluidity?

Accepted Answer

Cholesterol

Question 10

Which of the following best describes the role of water in hydrogen bonding between molecules?

Accepted Answer

Water molecules form hydrogen bonds with each other due to the polarity of the O-H bonds.

Question 11

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

Accepted Answer

A simple sugar that cannot be hydrolyzed into smaller carbohydrates.

Question 12

Which of the following is a correct example of a dehydration synthesis reaction?

Accepted Answer

$$Glucose + Fructose \rightarrow Sucrose + H_2O$$

Question 13

Which of the following statements about phospholipids is correct?

Accepted Answer

Phospholipids form the main structural component of cell membranes.

Question 14

Which of the following best explains the difference between a hypothesis and a theory in science?

Accepted Answer

A hypothesis is a testable prediction, while a theory is a comprehensive explanation supported by evidence.

Question 15

Which of the following is a correct representation of the molecular formula for glucose?

Accepted Answer

$$C_6H_{12}O_6$

Question 16

Which of the following is a correct description of the role of enzymes in biological reactions?

Accepted Answer

Enzymes decrease the activation energy required for reactions.

Question 17

Which of the following best describes the structure of a nucleotide?

Accepted Answer

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

Question 18

Which of the following is a correct example of a polysaccharide?

Accepted Answer

Cellulose

Question 19

Which of the following is a correct description of the function of the smooth endoplasmic reticulum?

Accepted Answer

Lipid synthesis and detoxification

Question 20

Which of the following best explains why water is an excellent solvent for biological molecules?

Accepted Answer

Water is polar and can form hydrogen bonds with many substances.

General Biology Exam 1 Study Guide: Molecules, Macromolecules, and Biological Concepts

Study Guide - Practice Questions