Question 1

Which of the following best describes the hierarchy of organization in the human body, starting from the smallest unit?

Accepted Answer

Chemical level → Cellular level → Tissue level → Organ level → Organ system level

Question 2

Which element is NOT commonly found in the human body in its simplest form?

Accepted Answer

Lithium (Li)

Question 3

What type of chemical bond is formed when electrons are transferred from a metal atom to a non-metal atom?

Accepted Answer

Ionic bond

Question 4

Which of the following molecules is amphiphilic and a major component of cell membranes?

Accepted Answer

Phospholipid

Question 5

A solution has a pH of 6. If a buffer is added and an acid is introduced, what is the expected effect of the buffer?

Accepted Answer

The buffer will prevent large changes in pH

Question 6

Which of the following is a polymer made up of many glucose monomers and serves as energy storage in muscle and liver cells?

Accepted Answer

Glycogen

Question 7

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

Accepted Answer

A phosphate group, a pentose sugar, and a nitrogenous base

Question 8

Which of the following is TRUE regarding the difference between DNA and RNA?

Accepted Answer

RNA contains uracil, while DNA contains thymine

Question 9

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

Accepted Answer

Structural roles, cell communication, muscle contraction, and acting as enzymes

Question 10

A patient is found to have a deficiency in sodium ions (Na+). Which of the following physiological processes would be most directly affected?

Accepted Answer

Nerve impulse transmission

Question 11

Which of the following best explains why nonpolar molecules do not dissolve in water?

Accepted Answer

Nonpolar molecules are hydrophobic and do not interact favorably with water

Question 12

Which of the following is the correct formula for calculating pH?

Accepted Answer

$$pH = -\log_{10}[H^+]$$

Question 13

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

Accepted Answer

A covalent bond formed between the amino group of one amino acid and the carboxyl group of another

Question 14

Which of the following is TRUE about ATP (adenosine triphosphate)?

Accepted Answer

ATP is a nucleotide that stores chemical energy for cellular processes

Question 15

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

Accepted Answer

Joining two amino acids to form a dipeptide and releasing water

Question 16

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

Accepted Answer

Folding of the polypeptide chain into alpha helices and beta sheets stabilized by hydrogen bonds

Question 17

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

Accepted Answer

Guanine (G) pairs with Cytosine (C)

Question 18

A patient is experiencing muscle cramps due to an electrolyte imbalance. Which ion is most likely involved?

Accepted Answer

Potassium (K)

Question 19

Which of the following is TRUE regarding the quaternary structure of proteins?

Accepted Answer

It involves multiple polypeptide chains assembling into a functional protein

Molecular Physiology Overview: Atoms, Molecules, and Biochemistry in Human Physiology

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