Question 1

Which of the following statements best describes the relationship between monomers and polymers in biological macromolecules?

Accepted Answer

Polymers are long molecules consisting of many similar or identical building blocks called monomers.

Question 2

Which reaction is responsible for the synthesis of a polymer from monomers, and what is the byproduct of this reaction?

Accepted Answer

Dehydration reaction; the byproduct is $$\mathrm{H_2O}.$$

Question 3

Which of the following macromolecules is NOT considered a polymer?

Accepted Answer

Lipid

Question 4

A scientist is studying a reaction where a water molecule is added to break a bond in a polymer, resulting in two smaller molecules. What is this reaction called?

Accepted Answer

Hydrolysis

Question 5

Which of the following best explains why cellulose and starch, both polymers of glucose, have different properties?

Accepted Answer

The glycosidic linkages in cellulose are $$\beta ($$beta) while those in starch are $$\alpha ($$alpha).

Question 6

Which of the following is a function of carbohydrates in living organisms?

Accepted Answer

Providing structural support and serving as a source of energy

Question 7

Which of the following is a correct pairing of a nucleotide base in DNA?

Accepted Answer

Guanine (G) pairs with Cytosine (C)

Question 8

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

Accepted Answer

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

Question 9

Which of the following is a function of proteins in cells?

Accepted Answer

Catalyzing chemical reactions and transporting substances

Question 10

A patient with Duchenne Muscular Dystrophy (DMD) has a mutation affecting the dystrophin protein. Which of the following is a direct consequence of this mutation?

Accepted Answer

Impaired formation of matriglycan on dystroglycan complexes

Question 11

Which of the following best describes the structure of a nucleotide?

Accepted Answer

A nitrogenous base, a pentose sugar, and one or more phosphate groups

Question 12

Which of the following is a correct description of complementary base pairing in nucleic acids?

Accepted Answer

In RNA, adenine pairs with uracil.

Question 13

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

Accepted Answer

Lipids are not made from monomers joined by dehydration reactions.

Question 14

Which of the following is a pentose sugar found in nucleic acids?

Accepted Answer

Ribose

Question 15

Which of the following best describes the process of gene expression?

Accepted Answer

DNA is transcribed into mRNA, which is then translated into protein.

Question 16

Which of the following is a structural polysaccharide found in plant cell walls?

Accepted Answer

Cellulose

Question 17

Which of the following best explains the role of enzymes in macromolecule metabolism?

Accepted Answer

Enzymes accelerate both the synthesis and breakdown of polymers.

Question 18

Which of the following is a correct statement about the difference between amylose and glycogen?

Accepted Answer

Glycogen is extensively branched, while amylose is unbranched.

Question 19

Which of the following best describes the function of matriglycan in muscle cells?

Accepted Answer

It is a sugar component of dystroglycan complexes, important for muscle cell membrane stability.

Macromolecules: Structure, Function, and Relevance in Microbiology

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