Question 1

Which of the following best explains why oxygen is essential for ATP production in human cells?

Accepted Answer

Oxygen is needed for the catabolism of fuels like glucose, which replenishes ATP supplies.

Question 2

A patient is unable to efficiently break down glycogen in their liver. Which immediate effect would you expect during periods of fasting?

Accepted Answer

Decreased levels of blood glucose due to impaired glycogenolysis.

Question 3

Which of the following correctly matches the organic compound with its primary function?

Accepted Answer

Proteins – Catalysis of biochemical reactions as enzymes

Question 4

A researcher isolates a molecule with the following structure: a glycerol backbone, two fatty acids, and a phosphate group. What is the primary function of this molecule in the body?

Accepted Answer

Main component of cell membranes

Question 5

Which of the following best describes the process by which ATP is synthesized from ADP and inorganic phosphate ($$P_i$$)?

Accepted Answer

It is a dehydration synthesis reaction that requires energy input.

Question 6

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

Accepted Answer

DNA stores genetic information, while RNA helps carry out these instructions.

Question 7

A mutation causes a cell to produce a protein with only 40 amino acids. Based on the definitions provided, how would this molecule be classified?

Accepted Answer

As a di- or polypeptide

Question 8

Which of the following best explains why triglycerides are effective for long-term energy storage?

Accepted Answer

They contain three fatty acids, which store more energy per gram than carbohydrates.

Question 9

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

Accepted Answer

Forming part of the barrier between cells and their environment

Question 10

A patient has a genetic disorder that prevents the formation of peptide bonds. Which of the following processes would be most directly affected?

Accepted Answer

Formation of proteins and polypeptides

Question 11

Which of the following best describes the relationship between monosaccharides and polysaccharides?

Accepted Answer

Monosaccharides are broken down from polysaccharides to be used as fuel.

Question 12

Which of the following molecules is most directly involved in the catalysis of biochemical reactions?

Accepted Answer

Proteins

Question 13

A cell is observed to have a high concentration of phosphatidylcholine. What is the most likely function of this molecule in the cell?

Accepted Answer

Structural component of the cell membrane

Question 14

Which of the following best describes the structure of ATP?

Accepted Answer

A nitrogenous base, a ribose sugar, and three phosphate groups

Question 15

Which of the following is a correct example of a disaccharide and its function?

Accepted Answer

Lactose; broken down into monosaccharides for fuel

Question 16

A person is unable to produce insulin. Which class of organic compounds is directly affected by this deficiency?

Accepted Answer

Proteins

Question 17

Which of the following best explains why glucose is considered the main fuel for all cells?

Accepted Answer

It is a monosaccharide that can be rapidly metabolized to produce ATP.

Question 18

Which of the following is a correct pairing of a molecule and its location in the body?

Accepted Answer

Glycogen; stored in liver and skeletal muscle cells

Question 19

A patient has a deficiency in the enzyme amylase. Which process would be most directly impaired?

Accepted Answer

Breakdown of polysaccharides into monosaccharides

Question 20

Which of the following best describes the role of RNA in the cell?

Accepted Answer

Carries out instructions to build proteins

Organic Compounds: Structure, Function, and Biological Importance

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