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 found to have a blood pH of 7.2. Which of the following best describes their blood?

Accepted Answer

Slightly acidic

Question 3

Which of the following best explains why sodium chloride (NaCl) dissolves in water?

Accepted Answer

The negative oxygen regions of water attract Na+ and the positive hydrogen regions attract Cl-

Question 4

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

Accepted Answer

They maintain ionic balance by converting strong acids or bases into weak ones

Question 5

Which of the following is NOT a characteristic of organic compounds?

Accepted Answer

Include water and salts

Question 6

What is the general formula for monosaccharides, and what does 'n' represent?

Accepted Answer

$$(CH_2O)_n$$, where n is the number of carbon atoms

Question 7

Which process is responsible for breaking down polymers into monomers in the digestive tract?

Accepted Answer

Hydrolysis

Question 8

Which of the following best describes the difference between saturated and unsaturated fatty acids?

Accepted Answer

Saturated fatty acids have only single bonds between carbons; unsaturated have one or more double bonds

Question 9

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

Accepted Answer

Major component of cell membranes

Question 10

A protein loses its functional shape after being exposed to high heat. This process is called:

Accepted Answer

Denaturation

Question 11

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

Accepted Answer

Primary

Question 12

Which of the following best describes the action of enzymes?

Accepted Answer

They lower the activation energy, speeding up reactions

Question 13

Which of the following is true about DNA?

Accepted Answer

It contains deoxyribose and is double-stranded

Question 14

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

Accepted Answer

Adenine pairs with thymine

Question 15

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

Accepted Answer

It provides immediate, usable energy for cellular work

Question 16

What happens when the terminal phosphate group is removed from ATP?

Accepted Answer

ATP is converted to ADP and energy is released

Question 17

Which of the following is a real-life example of a buffer system in the human body?

Accepted Answer

The carbonic acid–bicarbonate system in blood

Question 18

Which of the following is a polysaccharide used for energy storage in animals?

Accepted Answer

Glycogen

Question 19

Which of the following best describes the amphipathic nature of phospholipids?

Accepted Answer

They have both hydrophilic heads and hydrophobic tails

Chemistry Comes Alive: Biochemistry for Human Anatomy & Physiology

Study Guide - Practice Questions