$$ \mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy} $$

Question 1

Which of the following best describes the difference between a monosaccharide and a disaccharide?

Accepted Answer

A monosaccharide is a single sugar unit, while a disaccharide consists of two sugar units joined by a glycosidic bond.

Question 2

Which of the following is a correct example of a polysaccharide and its primary function in humans?

Accepted Answer

Glycogen; compact storage of glucose in liver and muscle

Question 3

A patient is diagnosed with atherosclerosis. Which type of fatty acid is most likely contributing to this condition?

Accepted Answer

Saturated fatty acids

Question 4

Which of the following statements about phospholipids is correct?

Accepted Answer

Phospholipids are amphipathic, containing both hydrophilic and hydrophobic regions, allowing them to form bilayers in membranes.

Question 5

Which of the following best explains why humans cannot digest cellulose?

Accepted Answer

Humans lack the enzymes to break the β(1→4) glycosidic bonds found in cellulose.

Question 6

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

Accepted Answer

The unique sequence of amino acids in a polypeptide, determined by the gene (DNA) sequence

Question 7

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

Accepted Answer

Hydrogen bonds between backbone atoms

Question 8

A competitive inhibitor affects enzyme activity by:

Accepted Answer

Binding to the active site and preventing substrate binding

Question 9

Which equation correctly represents the hydrolysis of ATP to release energy?

Accepted Answer

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

Question 10

During aerobic respiration, which pathway produces the majority of ATP?

Accepted Answer

Krebs (Citric Acid) Cycle & electron transport chain

Question 11

Which of the following is true regarding the structure of nucleic acids?

Accepted Answer

Nucleic acids contain a sugar, a phosphate group, and a nitrogenous base.

Question 12

Which of the following is a function of cholesterol in the body?

Accepted Answer

It stabilizes and emulsifies dietary fat and is a precursor for steroid hormones.

Question 13

A mutation causes a change in the amino acid sequence of a protein. Which level of protein structure is directly affected first?

Accepted Answer

Primary structure

Question 14

Which of the following best describes the role of enzymes in metabolic pathways?

Accepted Answer

Enzymes lower the activation energy, allowing reactions to proceed faster.

Question 15

Which of the following is a correct statement about feedback inhibition in metabolic pathways?

Accepted Answer

The end product of a pathway inhibits the first enzyme in the pathway, slowing or stopping the process.

Question 16

Which of the following is a correct example of a dehydration synthesis reaction?

Accepted Answer

Formation of a peptide bond between two amino acids, releasing water

Question 17

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

Accepted Answer

The arrangement of multiple polypeptide subunits in a functional protein complex

Question 18

Which of the following is a correct statement about essential fatty acids?

Accepted Answer

They must be obtained from the diet because the body cannot synthesize them.

Question 19

Which of the following is true about the function of ATP in cells?

Accepted Answer

ATP provides energy for cellular processes such as muscle contraction and nerve impulses.

Macromolecules and Cellular Respiration: Study Notes for Anatomy & Physiology

Study Guide - Practice Questions