Question 1

Which property of water allows it to help maintain a stable internal body temperature despite external temperature changes?

Accepted Answer

High heat capacity

Question 2

A patient is experiencing muscle cramps due to an electrolyte imbalance. Which of the following best explains the importance of salts in the human body?

Accepted Answer

Salts dissociate into ions that are essential for conducting electrical currents in solution.

Question 3

Which of the following equations correctly represents the neutralization reaction between hydrochloric acid and sodium hydroxide?

Accepted Answer

$$ \mathrm{HCl} + \mathrm{NaOH} \rightarrow \mathrm{NaCl} + \mathrm{H_2O} $$

Question 4

A solution has a hydrogen ion concentration of $$10^{-5} M. $$What is its pH?

Accepted Answer

$$ pH = 5 $$

Question 5

Which of the following best describes the function of buffers in the human body?

Accepted Answer

Buffers resist abrupt and large swings in pH by releasing or binding hydrogen ions.

Question 6

Which of the following is a correct statement about organic compounds?

Accepted Answer

They always contain carbon and are usually covalently bonded.

Question 7

Which process is responsible for breaking down polymers into monomers by adding water?

Accepted Answer

Hydrolysis

Question 8

Which of the following is a polysaccharide important for energy storage in humans?

Accepted Answer

Glycogen

Question 9

A triglyceride is formed by the combination of which molecules?

Accepted Answer

One glycerol and three fatty acids

Question 10

Which of the following best explains why phospholipids are important in cell membrane structure?

Accepted Answer

They have both polar and nonpolar regions, allowing them to form bilayers in water.

Question 11

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

Accepted Answer

It is a precursor for steroid hormones and is important in cell membranes.

Question 12

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

Accepted Answer

The sequence of amino acids in a polypeptide chain

Question 13

A patient with a high fever is at risk for protein denaturation. What is the most likely consequence of this process?

Accepted Answer

Loss of protein function due to unfolding of its three-dimensional structure

Question 14

Which of the following statements about enzymes is correct?

Accepted Answer

Enzymes lower the activation energy required for a reaction.

Question 15

Which of the following is a component of a nucleotide?

Accepted Answer

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

Question 16

Which base pairing is correct according to the DNA base-pair rule?

Accepted Answer

Adenine pairs with Thymine

Question 17

Which of the following best describes the role of ATP in cellular processes?

Accepted Answer

ATP provides energy for cellular work by transferring phosphate groups to other molecules.

Question 18

A solution with a pH of 2 is how many times more acidic than a solution with a pH of 5?

Accepted Answer

$$ 10^3 = 1000 $$ times more acidic

Question 19

Which of the following best explains why unsaturated fatty acids are considered 'heart healthy'?

Accepted Answer

They contain one or more double bonds, which reduce the number of hydrogen atoms and are typically found in plant oils.

Question 20

Which of the following is a function of molecular chaperones in cells?

Accepted Answer

They assist in the proper folding of proteins and prevent incorrect folding.

Chemistry Comes Alive: Foundations of Biochemistry for Anatomy & Physiology

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