Question 1

Which of the following best describes an amphiphilic molecule?

Accepted Answer

A molecule that contains both hydrophilic and hydrophobic regions.

Question 2

Which type of chemical bond is strongest in the absence of water?

Accepted Answer

Ionic bond

Question 3

A patient is given a drug that is highly hydrophobic. What is the most likely route of absorption for this drug in the body?

Accepted Answer

It will require a carrier protein or micelle for transport.

Question 4

Which of the following is NOT a macromolecule found in the human body?

Accepted Answer

Vitamin

Question 5

Which equation best represents the dissociation of sodium chloride in water?

Accepted Answer

$$\mathrm{NaCl_{(s)} \rightarrow Na^+_{(aq)} + Cl^-_{(aq)}}$$

Question 6

Which of the following elements is considered a micro inorganic element required for human physiology?

Accepted Answer

Zinc ($$\mathrm{Zn$$^{2+}$$})$$

Question 7

Which statement best explains why 'like dissolves like' in chemistry?

Accepted Answer

Polar molecules dissolve in polar solvents due to compatible intermolecular forces.

Question 8

Which of the following is a correct comparison between organic and inorganic molecules?

Accepted Answer

Organic molecules contain carbon and hydrogen, while inorganic molecules may lack carbon.

Question 9

A cell membrane is described as amphiphilic. Which structural feature allows this property?

Accepted Answer

Presence of both hydrophilic phosphate heads and hydrophobic fatty acid tails.

Question 10

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

Accepted Answer

Hydrogen bond

Question 11

A solution contains $$\mathrm{Na^+}$$, $$\mathrm{Cl^-}$$, and $$\mathrm{$$HCO_3$$^-}. $$Which term best describes this solution?

Accepted Answer

Electrolyte

Question 12

Which of the following best describes a hydrophobic interaction?

Accepted Answer

Repulsion between nonpolar molecules and water.

Question 13

Which of the following is a correct statement about the four biological macromolecules?

Accepted Answer

Lipids are assembled from fatty acids and glycerol.

Question 14

Which of the following bonds is most likely to be disrupted when a protein is placed in water?

Accepted Answer

Ionic bond

Question 15

A patient with chronic lower respiratory disease is likely to have issues with which physiological system?

Accepted Answer

Respiratory system

Question 16

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

Accepted Answer

Catalyzing biochemical reactions

Question 17

Which of the following is a correct example of a polar covalent bond?

Accepted Answer

$$\mathrm{O-H}$$

Question 18

Which of the following is most likely to be found as a salt or simple molecule in the human body?

Accepted Answer

Sodium chloride

Question 19

Which of the following best explains why water is considered a polar molecule?

Accepted Answer

It has a partial negative charge near the oxygen atom and a partial positive charge near the hydrogen atoms.

Question 20

Which of the following is a correct statement about the role of neurotransmitters in physiology?

Accepted Answer

They facilitate communication between nerve cells.

Lecture #1

Study Guide - Practice Questions