$$\text{Phosphate group} - \text{Sugar} - \text{Nitrogenous base}$$

Question 1

Which of the following best describes a monomer?

Accepted Answer

A small molecule that can join with others to form a polymer.

Question 2

Which process is responsible for breaking down polymers into monomers by adding water?

Accepted Answer

Hydrolysis

Question 3

A patient is unable to digest starch due to a deficiency in a specific enzyme. Which type of reaction is most directly affected?

Accepted Answer

Hydrolysis

Question 4

Which equation correctly represents the dehydration synthesis of two glucose molecules?

Accepted Answer

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

Question 5

Which of the following is a correct statement about glycosidic linkages?

Accepted Answer

They are covalent bonds between monosaccharides in polysaccharides.

Question 6

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

Accepted Answer

Unsaturated fatty acids contain one or more double bonds, causing kinks in the chain.

Question 7

Which of the following is a function of phospholipids in biological membranes?

Accepted Answer

They form a bilayer that acts as a barrier to most water-soluble substances.

Question 8

A mutation changes the primary structure of a protein. Which level of protein structure is directly affected first?

Accepted Answer

Primary structure

Question 9

Which of the following best describes the tertiary structure of a protein?

Accepted Answer

The overall three-dimensional shape formed by interactions among R-groups.

Question 10

Which of the following is a correct representation of a nucleotide's structure?

Accepted Answer

$$	ext{Phosphate group} - 	ext{Sugar} - 	ext{Nitrogenous base}$$

Question 11

Which of the following statements about DNA and RNA is correct?

Accepted Answer

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

Question 12

Which of the following best explains the function of cholesterol in cell membranes?

Accepted Answer

It stabilizes membrane fluidity across temperature changes.

Question 13

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

Accepted Answer

They are formed between the carboxyl group of one amino acid and the amino group of another.

Question 14

A change in the environment causes a protein to lose its three-dimensional structure. What is this process called?

Accepted Answer

Denaturation

Question 15

Which of the following best describes the difference between a purine and a pyrimidine?

Accepted Answer

Purines have a double ring structure, while pyrimidines have a single ring.

Question 16

Which of the following is a real-world example of how genomics has transformed biological inquiry?

Accepted Answer

Genomics has enabled the identification of genetic mutations responsible for inherited diseases.

Question 17

Which of the following is a correct statement about the function of enzymes in metabolic reactions?

Accepted Answer

Enzymes act as biological catalysts to speed up chemical reactions.

Question 18

Which of the following correctly describes the structure of a triglyceride?

Accepted Answer

Three fatty acids linked to a glycerol molecule by ester bonds.

Question 19

Which of the following is a correct statement about the quaternary structure of proteins?

Accepted Answer

It describes the arrangement of multiple polypeptide subunits in a protein complex.

Question 20

Which of the following best explains how X-ray crystallography is used in biology?

Accepted Answer

It reveals the three-dimensional structure of biological macromolecules.

Chapter 5 STUDY GUIDE - General Biology: Macromolecules and Their Biological Roles

Study Guide - Practice Questions