Question 1

Which of the following statements correctly describes the difference between D-glucose and L-glucose?

Accepted Answer

D-glucose and L-glucose differ in the configuration around the carbon farthest from the carbonyl group.

Question 2

Which of the following is a correct description of a peptide bond?

Accepted Answer

A peptide bond is formed between the carboxyl group of one amino acid and the amino group of another amino acid, releasing water.

Question 3

Which of the following best explains why saturated fatty acids have higher melting points than unsaturated fatty acids?

Accepted Answer

Saturated fatty acids have straight chains that allow tight packing, increasing van der Waals forces.

Question 4

A patient is diagnosed with a deficiency in the enzyme that breaks the $$eta-1$$,4 glycosidic bond in lactose. Which type of carbohydrate is most likely to accumulate in their digestive tract?

Accepted Answer

Disaccharides

Question 5

Which of the following is NOT a function of proteins in the human body?

Accepted Answer

Storing genetic information

Question 6

Which of the following correctly describes the difference between a competitive inhibitor and a noncompetitive inhibitor?

Accepted Answer

A competitive inhibitor binds to the active site, while a noncompetitive inhibitor binds to an allosteric site.

Question 7

Which of the following is a correct statement about the structure of nucleic acids?

Accepted Answer

RNA contains ribose, while DNA contains deoxyribose.

Question 8

Which of the following amino acids contains a sulfur atom in its side chain?

Accepted Answer

Methionine

Question 9

Which of the following is the correct order of protein structure from simplest to most complex?

Accepted Answer

Primary, secondary, tertiary, quaternary

Question 10

Which of the following statements about fatty acids is correct?

Accepted Answer

Saturated fatty acids have no double bonds in their hydrocarbon chains.

Question 11

Which of the following is a correct description of the difference between a nucleotide and a nucleoside?

Accepted Answer

A nucleotide contains a nitrogenous base, a sugar, and a phosphate group; a nucleoside contains only a nitrogenous base and a sugar.

Question 12

Which of the following reactions is an example of hydrolysis?

Accepted Answer

Breaking a peptide bond in a protein by adding water

Question 13

Which of the following best describes the role of tRNA in protein synthesis?

Accepted Answer

tRNA carries amino acids to the ribosome and matches them to the mRNA codon.

Question 14

Which of the following is a correct statement about the difference between alpha and beta anomers of glucose?

Accepted Answer

The alpha and beta anomers differ in the orientation of the hydroxyl group on the anomeric carbon.

Question 15

Which of the following is a correct description of the difference between a carboxylic acid and an ester?

Accepted Answer

A carboxylic acid contains a $$-COOH$$ group, while an ester contains a $$-COOR$$ group.

Question 16

Which of the following is a correct statement about denaturation of proteins?

Accepted Answer

Denaturation disrupts the secondary, tertiary, and quaternary structures but leaves the primary structure intact.

Question 17

Which of the following is a correct statement about the difference between purines and pyrimidines?

Accepted Answer

Purines have a two-ring structure, while pyrimidines have a one-ring structure.

Question 18

Which of the following is a correct statement about the formation of an amide bond?

Accepted Answer

An amide bond is formed between a carboxylic acid and an amine, releasing water.

Question 19

Which of the following is a correct statement about the difference between a triglyceride and a phospholipid?

Accepted Answer

A triglyceride contains three fatty acids and one glycerol, while a phospholipid contains two fatty acids, one glycerol, and a phosphate group.

Study Guide: Carbohydrates, Lipids, Amino Acids, Proteins, and Nucleic Acids

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