Question 1

Which property of carbon most directly contributes to the diversity of organic molecules found in living organisms?

Accepted Answer

Its ability to bond with four other atoms, allowing for varied molecular structures

Question 2

A hydrocarbon molecule contains only which types of atoms?

Accepted Answer

Carbon and hydrogen

Question 3

Which of the following best describes a dehydration reaction in the synthesis of biological polymers?

Accepted Answer

A water molecule is removed to form a new bond between monomers

Question 4

What is the general chemical formula for a monosaccharide with three carbons?

Accepted Answer

$C_3H_6O_3$

Question 5

If two monosaccharides with the formula $C_6H_{12}O_6$ are joined to form a disaccharide, what is the resulting chemical formula?

Accepted Answer

$C_{12}H_{22}O_{11}$

Question 6

Which polysaccharide is primarily used for energy storage in animals?

Accepted Answer

Glycogen

Question 7

Which type of fatty acid contains one or more double bonds and is typically found in plant oils?

Accepted Answer

Unsaturated fatty acids

Question 8

Trans fats are produced by which process?

Accepted Answer

Adding hydrogen atoms to unsaturated fats

Question 9

Phospholipids are essential components of which cellular structure?

Accepted Answer

Cell membrane

Question 10

Which of the following is NOT a function of proteins in living organisms?

Accepted Answer

Energy storage

Question 11

What is the result of protein denaturation?

Accepted Answer

The protein unravels, loses its specific shape, and loses its function

Question 12

Amino acids are linked together by which type of bond?

Accepted Answer

Peptide bond

Question 13

Which part of an amino acid varies among the 20 different types?

Accepted Answer

The R group (side chain)

Question 14

Which level of protein structure is stabilized primarily by interactions between R groups?

Accepted Answer

Tertiary structure

Question 15

Which of the following is a monomer of nucleic acids?

Accepted Answer

Nucleotide

Question 16

What are the three components of a nucleotide?

Accepted Answer

Sugar, phosphate group, nitrogenous base

Question 17

Which molecule serves as the blueprint for proteins and controls the life of a cell?

Accepted Answer

DNA

Question 18

Which of the following best explains why cellulose cannot be digested by most animals?

Accepted Answer

Cellulose has a unique glycosidic bond that most animals lack enzymes to break

Question 19

Which of the following is a real-world consequence of consuming trans fats?

Accepted Answer

Increased risk of health problems compared to saturated fats

Question 20

A mutation causes a change in the sequence of nucleotides in a gene. What is the most direct consequence of this change?

Accepted Answer

The protein encoded by the gene may have an altered amino acid sequence

Macromolecules Study Guide

Study Guide - Practice Questions