1
AC-HPAT EXAM Actual Exam 2026/2027 Complete
Questions and Verified Answers with Detailed
Rationales Comprehensive Exam Preparation Guide
Pass Guaranteed - A+ Graded
SECTION 1: READING COMPREHENSION (Questions 1-30)
Passage 1: The human circulatory system is a complex network of blood vessels, the heart, and
blood that delivers oxygen and nutrients to cells while removing waste products. The heart, a
muscular organ roughly the size of a fist, pumps blood through two main circuits: the pulmonary
circuit, which carries blood to the lungs for oxygenation, and the systemic circuit, which
distributes oxygenated blood throughout the body. Arteries carry blood away from the heart,
while veins return blood to the heart. Capillaries, the smallest blood vessels, facilitate the
exchange of gases, nutrients, and waste between blood and tissues.
Q1: What is the primary function of the circulatory system as described in the passage?
A. To produce blood cells in the bone marrow
B. To deliver oxygen and nutrients while removing waste [CORRECT]
C. To regulate body temperature through blood flow
D. To store excess nutrients for future use
Correct Answer: B
Rationale: The passage explicitly states that the circulatory system "delivers oxygen and
nutrients to cells while removing waste products," making this the primary function described.
Q2: According to the passage, what distinguishes arteries from veins?
A. Arteries are smaller than veins
B. Arteries carry blood away from the heart, while veins return blood to the heart [CORRECT]
C. Arteries contain valves, while veins do not
D. Arteries only carry oxygenated blood
Correct Answer: B
Rationale: The passage directly states that "Arteries carry blood away from the heart, while
veins return blood to the heart," providing the key distinction between these vessel types.
,2
Q3: What role do capillaries play in the circulatory system?
A. They pump blood through the heart chambers
B. They store excess blood for emergency use
C. They facilitate exchange between blood and tissues [CORRECT]
D. They protect blood from contamination
Correct Answer: C
Rationale: The passage identifies capillaries as "the smallest blood vessels" that "facilitate the
exchange of gases, nutrients, and waste between blood and tissues."
Passage 2: The process of photosynthesis converts light energy into chemical energy stored in
glucose molecules. This process occurs primarily in the chloroplasts of plant cells, specifically
within structures called thylakoids. During the light-dependent reactions, chlorophyll absorbs
sunlight and splits water molecules, releasing oxygen as a byproduct. The energy captured is
stored in ATP and NADPH. In the light-independent reactions (Calvin cycle), these energy
carriers are used to convert carbon dioxide into glucose. Photosynthesis is essential for life on
Earth, as it provides the oxygen we breathe and forms the base of most food chains.
Q4: Where does the light-dependent phase of photosynthesis occur?
A. In the cell nucleus
B. In the mitochondria
C. In the thylakoids of chloroplasts [CORRECT]
D. In the cell membrane
Correct Answer: C
Rationale: The passage states that photosynthesis occurs "primarily in the chloroplasts of plant
cells, specifically within structures called thylakoids," identifying this as the location of the light-
dependent reactions.
Q5: What is the primary purpose of the Calvin cycle?
A. To release oxygen as a byproduct
B. To convert carbon dioxide into glucose [CORRECT]
C. To absorb sunlight through chlorophyll
D. To split water molecules
Correct Answer: B
Rationale: The passage describes the light-independent reactions (Calvin cycle) as using energy
carriers "to convert carbon dioxide into glucose," identifying this as its primary purpose.
,3
Q6: Which of the following is identified as a byproduct of photosynthesis in the passage?
A. Glucose
B. Carbon dioxide
C. Oxygen [CORRECT]
D. ATP
Correct Answer: C
Rationale: The passage explicitly states that during the light-dependent reactions, "chlorophyll
absorbs sunlight and splits water molecules, releasing oxygen as a byproduct."
Passage 3: Antibiotic resistance has become a significant global health concern. When bacteria
are exposed to antibiotics, susceptible bacteria are killed, but naturally resistant variants survive
and reproduce. Over time, through natural selection, resistant populations dominate. The overuse
and misuse of antibiotics in human medicine and agriculture accelerate this process. Resistant
bacteria can spread through communities, making common infections difficult to treat. Medical
professionals now emphasize antibiotic stewardship—using these medications only when
necessary and completing prescribed courses—to slow resistance development.
Q7: What is the main idea of this passage?
A. Antibiotics are no longer effective for any bacterial infections
B. Antibiotic resistance develops through natural selection and is accelerated by overuse
[CORRECT]
C. Bacteria have become extinct due to antibiotic overuse
D. Natural selection no longer operates in bacterial populations
Correct Answer: B
Rationale: The passage explains how antibiotic resistance develops through natural selection
(resistant bacteria surviving and reproducing) and emphasizes that "overuse and
misuse...accelerate this process," making this the central thesis.
Q8: According to the passage, what happens when bacteria are exposed to antibiotics?
A. All bacteria immediately develop resistance
B. Susceptible bacteria are killed while resistant variants survive [CORRECT]
C. Bacteria become dormant and inactive
D. Antibiotics have no effect on bacterial populations
, 4
Correct Answer: B
Rationale: The passage states that "When bacteria are exposed to antibiotics, susceptible
bacteria are killed, but naturally resistant variants survive and reproduce," describing the
selective process.
Q9: What does the term "antibiotic stewardship" refer to in this passage?
A. The development of new antibiotics
B. Responsible use of antibiotics to slow resistance [CORRECT]
C. The complete elimination of antibiotic use
D. Government regulation of pharmaceutical companies
Correct Answer: B
Rationale: The passage defines antibiotic stewardship as "using these medications only when
necessary and completing prescribed courses—to slow resistance development," indicating
responsible use practices.
Passage 4: The scientific method provides a systematic approach to investigating natural
phenomena. It begins with observation, followed by the formulation of a hypothesis—a testable
explanation for the observed phenomenon. Scientists then design experiments to test the
hypothesis, controlling variables to isolate cause-and-effect relationships. Data collection and
analysis determine whether the hypothesis is supported or refuted. Conclusions are drawn based
on evidence, and findings are communicated to the scientific community for peer review and
replication. This self-correcting process ensures that scientific knowledge is reliable and
continually refined.
Q10: What is the first step in the scientific method according to the passage?
A. Formulating a hypothesis
B. Designing experiments
C. Observation [CORRECT]
D. Drawing conclusions
Correct Answer: C
Rationale: The passage explicitly states that the scientific method "begins with observation,"
making this the initial step in the process.
Q11: What is the purpose of controlling variables in experiments?
AC-HPAT EXAM Actual Exam 2026/2027 Complete
Questions and Verified Answers with Detailed
Rationales Comprehensive Exam Preparation Guide
Pass Guaranteed - A+ Graded
SECTION 1: READING COMPREHENSION (Questions 1-30)
Passage 1: The human circulatory system is a complex network of blood vessels, the heart, and
blood that delivers oxygen and nutrients to cells while removing waste products. The heart, a
muscular organ roughly the size of a fist, pumps blood through two main circuits: the pulmonary
circuit, which carries blood to the lungs for oxygenation, and the systemic circuit, which
distributes oxygenated blood throughout the body. Arteries carry blood away from the heart,
while veins return blood to the heart. Capillaries, the smallest blood vessels, facilitate the
exchange of gases, nutrients, and waste between blood and tissues.
Q1: What is the primary function of the circulatory system as described in the passage?
A. To produce blood cells in the bone marrow
B. To deliver oxygen and nutrients while removing waste [CORRECT]
C. To regulate body temperature through blood flow
D. To store excess nutrients for future use
Correct Answer: B
Rationale: The passage explicitly states that the circulatory system "delivers oxygen and
nutrients to cells while removing waste products," making this the primary function described.
Q2: According to the passage, what distinguishes arteries from veins?
A. Arteries are smaller than veins
B. Arteries carry blood away from the heart, while veins return blood to the heart [CORRECT]
C. Arteries contain valves, while veins do not
D. Arteries only carry oxygenated blood
Correct Answer: B
Rationale: The passage directly states that "Arteries carry blood away from the heart, while
veins return blood to the heart," providing the key distinction between these vessel types.
,2
Q3: What role do capillaries play in the circulatory system?
A. They pump blood through the heart chambers
B. They store excess blood for emergency use
C. They facilitate exchange between blood and tissues [CORRECT]
D. They protect blood from contamination
Correct Answer: C
Rationale: The passage identifies capillaries as "the smallest blood vessels" that "facilitate the
exchange of gases, nutrients, and waste between blood and tissues."
Passage 2: The process of photosynthesis converts light energy into chemical energy stored in
glucose molecules. This process occurs primarily in the chloroplasts of plant cells, specifically
within structures called thylakoids. During the light-dependent reactions, chlorophyll absorbs
sunlight and splits water molecules, releasing oxygen as a byproduct. The energy captured is
stored in ATP and NADPH. In the light-independent reactions (Calvin cycle), these energy
carriers are used to convert carbon dioxide into glucose. Photosynthesis is essential for life on
Earth, as it provides the oxygen we breathe and forms the base of most food chains.
Q4: Where does the light-dependent phase of photosynthesis occur?
A. In the cell nucleus
B. In the mitochondria
C. In the thylakoids of chloroplasts [CORRECT]
D. In the cell membrane
Correct Answer: C
Rationale: The passage states that photosynthesis occurs "primarily in the chloroplasts of plant
cells, specifically within structures called thylakoids," identifying this as the location of the light-
dependent reactions.
Q5: What is the primary purpose of the Calvin cycle?
A. To release oxygen as a byproduct
B. To convert carbon dioxide into glucose [CORRECT]
C. To absorb sunlight through chlorophyll
D. To split water molecules
Correct Answer: B
Rationale: The passage describes the light-independent reactions (Calvin cycle) as using energy
carriers "to convert carbon dioxide into glucose," identifying this as its primary purpose.
,3
Q6: Which of the following is identified as a byproduct of photosynthesis in the passage?
A. Glucose
B. Carbon dioxide
C. Oxygen [CORRECT]
D. ATP
Correct Answer: C
Rationale: The passage explicitly states that during the light-dependent reactions, "chlorophyll
absorbs sunlight and splits water molecules, releasing oxygen as a byproduct."
Passage 3: Antibiotic resistance has become a significant global health concern. When bacteria
are exposed to antibiotics, susceptible bacteria are killed, but naturally resistant variants survive
and reproduce. Over time, through natural selection, resistant populations dominate. The overuse
and misuse of antibiotics in human medicine and agriculture accelerate this process. Resistant
bacteria can spread through communities, making common infections difficult to treat. Medical
professionals now emphasize antibiotic stewardship—using these medications only when
necessary and completing prescribed courses—to slow resistance development.
Q7: What is the main idea of this passage?
A. Antibiotics are no longer effective for any bacterial infections
B. Antibiotic resistance develops through natural selection and is accelerated by overuse
[CORRECT]
C. Bacteria have become extinct due to antibiotic overuse
D. Natural selection no longer operates in bacterial populations
Correct Answer: B
Rationale: The passage explains how antibiotic resistance develops through natural selection
(resistant bacteria surviving and reproducing) and emphasizes that "overuse and
misuse...accelerate this process," making this the central thesis.
Q8: According to the passage, what happens when bacteria are exposed to antibiotics?
A. All bacteria immediately develop resistance
B. Susceptible bacteria are killed while resistant variants survive [CORRECT]
C. Bacteria become dormant and inactive
D. Antibiotics have no effect on bacterial populations
, 4
Correct Answer: B
Rationale: The passage states that "When bacteria are exposed to antibiotics, susceptible
bacteria are killed, but naturally resistant variants survive and reproduce," describing the
selective process.
Q9: What does the term "antibiotic stewardship" refer to in this passage?
A. The development of new antibiotics
B. Responsible use of antibiotics to slow resistance [CORRECT]
C. The complete elimination of antibiotic use
D. Government regulation of pharmaceutical companies
Correct Answer: B
Rationale: The passage defines antibiotic stewardship as "using these medications only when
necessary and completing prescribed courses—to slow resistance development," indicating
responsible use practices.
Passage 4: The scientific method provides a systematic approach to investigating natural
phenomena. It begins with observation, followed by the formulation of a hypothesis—a testable
explanation for the observed phenomenon. Scientists then design experiments to test the
hypothesis, controlling variables to isolate cause-and-effect relationships. Data collection and
analysis determine whether the hypothesis is supported or refuted. Conclusions are drawn based
on evidence, and findings are communicated to the scientific community for peer review and
replication. This self-correcting process ensures that scientific knowledge is reliable and
continually refined.
Q10: What is the first step in the scientific method according to the passage?
A. Formulating a hypothesis
B. Designing experiments
C. Observation [CORRECT]
D. Drawing conclusions
Correct Answer: C
Rationale: The passage explicitly states that the scientific method "begins with observation,"
making this the initial step in the process.
Q11: What is the purpose of controlling variables in experiments?
