Question 1

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

Accepted Answer

Lipids are made from fatty acids and glycerol, but these components are not joined in a long, repeating chain.

Question 2

A dehydration synthesis reaction between two glucose molecules forms which type of bond?

Accepted Answer

Glycosidic linkage

Question 3

Which of the following best describes the difference between starch and cellulose?

Accepted Answer

Starch is a branched polymer, while cellulose is a straight polymer due to beta-1,4 glycosidic linkages.

Question 4

Which of the following is a correct representation of the general formula for a monosaccharide?

Accepted Answer

$$C_nH_{2n}O_n$$

Question 5

A patient is diagnosed with a genetic disorder that affects the formation of disulfide bridges in proteins. Which amino acid is most likely mutated?

Accepted Answer

Cysteine

Question 6

Which level of protein structure is directly determined by the sequence of amino acids?

Accepted Answer

Primary structure

Question 7

What is the main function of phospholipids in biological systems?

Accepted Answer

Forming cell membranes due to their amphipathic nature

Question 8

Which of the following best describes the backbone of a nucleic acid polymer?

Accepted Answer

A sugar-phosphate chain linked by phosphodiester bonds

Question 9

During the process of hydrolysis, which molecule is added to break a polymer into its monomers?

Accepted Answer

Water ($$H_2O)$$

Question 10

Which of the following is a function of defensive proteins in the human body?

Accepted Answer

Protecting against disease by recognizing and binding foreign substances

Question 11

A mutation causes the replacement of a hydrophobic amino acid with a hydrophilic one in the core of a protein. What is the most likely effect?

Accepted Answer

The protein may misfold or lose its function due to disruption of hydrophobic interactions.

Question 12

Which of the following best describes the central dogma of molecular biology?

Accepted Answer

$$DNA \rightarrow RNA \rightarrow Protein$$

Question 13

Which type of bond is responsible for stabilizing the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

Question 14

Which of the following is a distinguishing feature of unsaturated fatty acids compared to saturated fatty acids?

Accepted Answer

Unsaturated fatty acids contain one or more double bonds in their hydrocarbon chains.

Question 15

Which of the following is true about the antiparallel nature of DNA?

Accepted Answer

One strand runs 5' to 3', while the other runs 3' to 5'.

Question 16

Which of the following is a real-world consequence of the inability of humans to digest cellulose?

Accepted Answer

Cellulose acts as insoluble fiber, aiding in digestive health.

Question 17

Which of the following best describes the role of chaperonin proteins in cells?

Accepted Answer

They assist in the proper folding of other proteins.

Question 18

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

Accepted Answer

A nucleotide consists of a nitrogenous base, a pentose sugar, and one or more phosphate groups.

Question 19

Which of the following is a function of transport proteins in the human body?

Accepted Answer

They move substances such as oxygen or ions across membranes.

Question 20

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

Accepted Answer

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

The Structure and Function of Large Biological Molecules: Carbohydrates, Lipids, Proteins, and Nucleic Acids

Study Guide - Practice Questions