Question 1

Which of the following statements best describes a monosaccharide?

Accepted Answer

A carbohydrate with multiple hydroxyl groups and either an aldehyde or ketone group, that cannot be hydrolyzed.

Question 2

Which of the following is the correct Fischer projection for D-glucose?

Accepted Answer

The hydroxyl group on the highest numbered chiral carbon is on the right.

Question 3

Which statement correctly distinguishes between enantiomers and diastereomers of monosaccharides?

Accepted Answer

Enantiomers differ at all chiral centers, while diastereomers differ at one or more but not all chiral centers.

Question 4

Which of the following reactions is used to test for the presence of a reducing sugar?

Accepted Answer

Benedict's test, which results in a brick red precipitate if reducing sugar is present.

Question 5

Which statement about the structure of triacylglycerols is correct?

Accepted Answer

They are composed of three fatty acids linked to a glycerol backbone via ester bonds.

Question 6

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

Accepted Answer

Unsaturated fatty acids have double bonds that introduce kinks, preventing tight packing.

Question 7

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

Accepted Answer

Energy storage

Question 8

Which bond is broken during protein hydrolysis?

Accepted Answer

Peptide bond

Question 9

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

Accepted Answer

The sequence of amino acids in a polypeptide chain.

Question 10

Which of the following is true about enzyme catalysis?

Accepted Answer

Enzymes lower the activation energy of a reaction but do not change the reaction's free energy ($\Delta G$).

Question 11

Which of the following is a correct description of competitive enzyme inhibition?

Accepted Answer

The inhibitor binds to the active site, preventing substrate binding.

Question 12

Which of the following is a difference between DNA and RNA?

Accepted Answer

DNA contains deoxyribose, while RNA contains ribose.

Question 13

Which of the following correctly matches the function of mitochondria in metabolism?

Accepted Answer

Site of the citric acid cycle and electron transport chain.

Question 14

Which of the following is the correct net equation for ATP hydrolysis?

Accepted Answer

$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy}$

Question 15

Which of the following is a product of glycolysis?

Accepted Answer

$\mathrm{Pyruvate}$

Question 16

Which of the following statements about the electron transport chain is correct?

Accepted Answer

It uses electrons from NADH and FADH$_2$ to produce ATP.

Question 17

Which of the following is true about the hydrolysis of a triacylglycerol?

Accepted Answer

It produces three fatty acids and one glycerol molecule.

Question 18

Which of the following is a correct description of the secondary structure of a protein?

Accepted Answer

It is the regular folding of the polypeptide chain into alpha helices and beta sheets stabilized by hydrogen bonds.

Question 19

Which of the following is a correct description of passive transport across the cell membrane?

Accepted Answer

Movement of molecules from high to low concentration without energy input.

Comprehensive Study Guide: Carbohydrates, Lipids, Amino Acids & Proteins, Enzymes & Vitamins, Nucleic Acids, and Metabolism

Study Guide - Practice Questions