$$[H^+] = 1 \times 10$$^{-4}$$ \text{ M}$$

Question 1

Which property of water allows lakes to resist rapid temperature changes, thereby supporting aquatic life during seasonal shifts?

Accepted Answer

Water's high specific heat due to hydrogen bonding

Question 2

A patient is suffering from metabolic acidosis. Which buffer system in the blood helps resist drastic changes in pH?

Accepted Answer

Bicarbonate buffer system

Question 3

Which of the following best describes a hydrophobic molecule?

Accepted Answer

A molecule with many relatively nonpolar covalent bonds

Question 4

What is the correct formula for calculating pH from hydrogen ion concentration?

Accepted Answer

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

Question 5

Which of the following is a real-life example of evaporative cooling in the human body?

Accepted Answer

Sweating during exercise

Question 6

A solution has a pH of 4. What is its hydrogen ion concentration?

Accepted Answer

$$[H^+] = 1 	imes 10$$^{-4}$$ 	ext{ M}$$

Question 7

Which of the following statements about acids and bases is correct?

Accepted Answer

Acids release hydrogen ions and bases release hydroxyl ions

Question 8

What happens during a dehydration synthesis reaction?

Accepted Answer

Two monomers are joined together by removing a water molecule

Question 9

Which carbohydrate is the primary storage form in animals?

Accepted Answer

Glycogen

Question 10

A triglyceride is formed by the dehydration synthesis of which components?

Accepted Answer

One glycerol molecule and three fatty acids

Question 11

Which of the following best explains why unsaturated fats are liquid at room temperature?

Accepted Answer

Their fatty acid chains have double bonds causing kinks that prevent tight packing

Question 12

Which molecule is a major component of cell membranes due to its amphipathic nature?

Accepted Answer

Phospholipid

Question 13

What is the main function of cholesterol in animal cells?

Accepted Answer

Structural component of plasma membranes

Question 14

Which of the following is NOT a property of water that supports life?

Accepted Answer

Low specific heat

Question 15

A buffer can resist changes in pH by:

Accepted Answer

Releasing hydrogen ions when pH rises and binding them when pH falls

Question 16

Which of the following is a disaccharide important in human nutrition?

Accepted Answer

Lactose

Question 17

Which of the following best describes the difference between hydrophilic and hydrophobic substances?

Accepted Answer

Hydrophilic substances have an affinity for water, while hydrophobic substances do not

Question 18

Which of the following is true about the structure of steroids?

Accepted Answer

They consist of four interlocking hydrocarbon rings

Question 19

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

Accepted Answer

Hydrolysis

Question 20

A solution with a pH of 8 is considered:

Accepted Answer

Basic

Water, Acids/Bases, Buffers, and Biomolecules: Foundations for Anatomy & Physiology

Study Guide - Practice Questions