AC-HPAT Biology Module 1, HPAT Ireland, 2025/2026 – test exam questions with verified answers

AC-HPAT Biology Module 1 Test Exam Questions and
Verified Answers 100% - Latest 2025/2026


1. The indicated charges allow these molecules to



Select one:

a. act as a solvent.

b. buffer a solution.

c. form the cell membrane.

d. store energy for cellular use.: A

2. In living systems, excess hydroxide or hydrogen ions will be removed by a/an:

Select one:

a. salt.

b. acid.

c. base.

d. buffer.: D

3. In a solution that is acidic, the number of:



,Select one:

a. OH-ions is greater than the number of H+ions.

b. OH-ions is less than the number of H+ions.

c. H+ions is less than the number of OH-ions.

d. H+ions is equal to the number of OH-ions.: B

4. Some biologically-important molecules dissolve easily in water because the water

molecule is:

Select one:

a. polar.

b. organic.

c. saturated.

d. a polymer.: A

5. Water is an excellent solvent because the water molecule is:

Select one:

a. ionic.

b. polar.



,c. acidic.

d. saturated.: B






, 6. A substance with a pH=6 could be described as:

Select one:

a. a weaḱ base.

b. a weaḱ acid.

c. a strong base.

d. a strong acid.

e. neutral.: B
7. Which substance releases hydrogen ions causing the pH of a solution to

decrease?

Select one:

a. water
b. lipids
c. hydrochloric acid

d. sodium bicarbonate: C

8. Water allows chemical reactions in cells to occur because it:

Select one:

a. acts as a solvent.

b. evaporates readily.