Question 1

Which of the following best explains why carbon is considered an excellent building block for organic molecules?

Accepted Answer

Carbon can form up to four covalent bonds, allowing for a variety of molecular shapes and sizes.

Question 2

Which of the following molecules is NOT considered an organic molecule?

Accepted Answer

CO2

Question 3

Which functional group is characterized by the formula $$\mathrm{–COOH}$$ and is commonly found in amino acids?

Accepted Answer

Carboxyl group

Question 4

Which of the following is NOT a primary class of biomolecule?

Accepted Answer

Vitamins

Question 5

What type of reaction links monomers together to form polymers, releasing water as a byproduct?

Accepted Answer

Dehydration synthesis

Question 6

Which of the following chemical formulas represents a simple carbohydrate (monosaccharide)?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$}$$

Question 7

Which polysaccharide is an important component in the structure of lobsters and insects?

Accepted Answer

Chitin

Question 8

Which type of fatty acid only contains carbon-carbon single bonds?

Accepted Answer

Saturated fatty acids

Question 9

Phospholipids are unique among lipids because they contain:

Accepted Answer

A hydrophilic head and two hydrophobic tails

Question 10

Which of the following statements about biological waxes is true?

Accepted Answer

They are energy storage molecules and provide waterproofing.

Question 11

Proteins are polymers made of which type of monomer?

Accepted Answer

Amino acids

Question 12

Which of the following is always found in every amino acid?

Accepted Answer

Amino group and carboxyl group

Question 13

What is the role of a chaperone protein?

Accepted Answer

Assist in protein folding or re-naturing

Question 14

Which of the following best describes a nucleotide?

Accepted Answer

A nitrogenous base, a phosphate group, and a 5-carbon sugar

Question 15

Which nitrogenous bases are purines?

Accepted Answer

Adenine and guanine

Question 16

Which of the following statements about DNA structure is true?

Accepted Answer

The two nucleotide strands in a DNA molecule are oriented antiparallel to each other.

Question 17

Which reaction results in energy release when glycosidic bonds are broken?

Accepted Answer

Hydrolysis

Question 18

Which of the following is NOT a function of carbohydrates?

Accepted Answer

Catalyzing chemical reactions

Question 19

Which of the following statements about lipids is correct?

Accepted Answer

Lipids are hydrophobic molecules that do not form true polymers.

Question 20

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

DNA contains deoxyribose sugar, while RNA contains ribose sugar.

The Molecules of Cells: Structure and Function of Biomolecules

Study Guide - Practice Questions