Question 1

Which of the following best describes a polar covalent bond?

Accepted Answer

A bond where electrons are shared unequally, resulting in partial charges on the atoms.

Question 2

A patient is given a solution with a pH of 3. Which of the following statements is correct regarding the hydrogen ion concentration in this solution?

Accepted Answer

It has a higher concentration of hydrogen ions than a solution with pH 7.

Question 3

Which of the following reactions represents a dehydration synthesis?

Accepted Answer

$$ \mathrm{A{-}H} + \mathrm{HO{-}B} \rightarrow \mathrm{A{-}B} + \mathrm{H_2O} $$

Question 4

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

Accepted Answer

Oxygen has a stronger pull on the shared electrons, creating partial charges.

Question 5

A solution contains a solute that completely dissociates into cations and anions, neither of which are $$ \mathrm{H^+}  or$$ $$ \mathrm{OH^-} . $$This solute is best classified as a:

Accepted Answer

Salt

Question 6

Which of the following is a correct example of an exchange reaction?

Accepted Answer

$$ \mathrm{AB} + \mathrm{CD} \rightarrow \mathrm{AD} + \mathrm{CB} $$

Question 7

Which of the following statements about strong acids and bases is TRUE?

Accepted Answer

Strong bases dissociate completely in solution.

Question 8

A patient is experiencing acidosis. Which of the following would help buffer the blood pH?

Accepted Answer

Adding a weak base

Question 9

Which of the following best describes the relationship between $$ \mathrm{[H^+]} $$ and pH?

Accepted Answer

As $$ \mathrm{[H^+]} $$ increases, pH decreases.

Question 10

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

Accepted Answer

Providing insulation and energy storage

Question 11

A molecule with the formula $$ \mathrm{C$$_{6}$$H_{12}O$$_{6}} $ is most likely a:

Accepted Answer

Monosaccharide

Question 12

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

Accepted Answer

A molecule with a diglyceride, a phosphate group, and a hydrophilic head with hydrophobic tails

Question 13

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

Accepted Answer

Energy storage

Question 14

Which level of protein structure is determined by the sequence of amino acids?

Accepted Answer

Primary structure

Question 15

During the formation of a peptide bond, which type of reaction occurs?

Accepted Answer

Dehydration synthesis

Question 16

Which of the following best describes the structure of DNA?

Accepted Answer

A double helix with complementary base pairing between purines and pyrimidines

Question 17

Which of the following base pairs is found in RNA but not in DNA?

Accepted Answer

Adenine–Uracil

Question 18

Which of the following best describes the process of phosphorylation in ATP production?

Accepted Answer

The addition of a phosphate group to ADP to form ATP

Question 19

A patient is found to have a genetic disorder affecting the structure of their hemoglobin protein. Which level(s) of protein structure could be affected?

Accepted Answer

Any or all levels: primary, secondary, tertiary, and quaternary

Question 20

Which of the following is a correct example of a reversible reaction?

Accepted Answer

$$ \mathrm{A} + \mathrm{B} \leftrightarrow \mathrm{AB} $$

Chemical Level of Organization: Foundations for Anatomy & Physiology

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