Question 1

Which of the following statements best describes a condensation (dehydration synthesis) reaction in the formation of biological macromolecules?

Accepted Answer

It links monomers together by removing a molecule of water.

Question 2

Which type of macromolecule is primarily responsible for storing genetic information in living organisms?

Accepted Answer

Nucleic acids

Question 3

A triglyceride is formed by joining three fatty acids to a glycerol molecule. What type of bond is created during this process?

Accepted Answer

Ester linkage

Question 4

Which of the following best explains why saturated fatty acids tend to be solid at room temperature?

Accepted Answer

Their straight chains allow molecules to pack closely together.

Question 5

Which structural feature distinguishes DNA from RNA?

Accepted Answer

DNA contains deoxyribose and thymine; RNA contains ribose and uracil.

Question 6

What is the primary function of phospholipids in cells?

Accepted Answer

Forming cellular membranes

Question 7

Which of the following is a correct description of a hydrolysis reaction?

Accepted Answer

It breaks a polymer into monomers by adding a water molecule.

Question 8

Which level of protein structure is defined by the unique sequence of amino acids in a polypeptide?

Accepted Answer

Primary structure

Question 9

A mutation changes a single amino acid in one of the four polypeptide chains of hemoglobin. Which level of protein structure is directly affected first?

Accepted Answer

Primary structure

Question 10

Which of the following best explains why enzymes are typically proteins rather than carbohydrates or lipids?

Accepted Answer

Proteins have diverse side chains that allow for complex folding and active sites.

Question 11

Which of the following is true about the structure of cellulose?

Accepted Answer

It is a polymer of $$\beta-$$glucose monomers joined by $$\beta-1$$,4-glycosidic linkages.

Question 12

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

Accepted Answer

Alternating sugar and phosphate groups linked by phosphodiester bonds

Question 13

Which property of RNA makes it a better candidate than DNA for the first self-replicating molecule in the origin of life?

Accepted Answer

RNA can both store genetic information and catalyze chemical reactions.

Question 14

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

Accepted Answer

$$C_{n}(H$$_{2}$$O)_{n}$$

Question 15

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

Accepted Answer

Storing genetic information

Question 16

Which type of covalent bond links monosaccharides together in polysaccharides?

Accepted Answer

Glycosidic linkage

Question 17

Which of the following best explains why only left-handed (L) amino acid isomers are used in protein synthesis?

Accepted Answer

Enzymes responsible for protein synthesis are specific for L-isomers due to their active site geometry.

Question 18

Which of the following is a real-world example of a carbohydrate's role in cell identity?

Accepted Answer

Glycoproteins on the surface of red blood cells determining blood type

Question 19

Which of the following best describes the difference between amylose and amylopectin?

Accepted Answer

Amylose is unbranched, while amylopectin is branched.

Question 20

Which of the following is a correct description of the antiparallel nature of DNA?

Accepted Answer

The two strands run in opposite directions: one 5' to 3', the other 3' to 5'.

Biological Macromolecules: Structure, Synthesis, and Function

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