REAL ASVAB PRACTICE TEST 2026/2027 | Full-Length Exam
| Armed Services Vocational Aptitude Battery | Latest Update
| Graded A | 100% Verified Solutions | Pass Guaranteed
[Section 1: General Science (GS) - Biology, Chemistry, Physics, Health (Q1-25)]
Q1. Which organelle is responsible for producing ATP through cellular respiration?
A. Nucleus
B. Ribosome
C. Mitochondria
D. Golgi apparatus
Correct Answer: C. Mitochondria [CORRECT]
Rationale: Mitochondria are the "powerhouses" of the cell, generating ATP via cellular
respiration. The nucleus houses DNA, ribosomes synthesize proteins, and the Golgi
apparatus modifies and packages proteins.
Q2. During photosynthesis, which gas is absorbed and which gas is released?
A. Oxygen absorbed, carbon dioxide released
B. Carbon dioxide absorbed, oxygen released
C. Nitrogen absorbed, oxygen released
D. Carbon dioxide absorbed, nitrogen released
Correct Answer: B. Carbon dioxide absorbed, oxygen released [CORRECT]
Rationale: Photosynthesis uses carbon dioxide and water to produce glucose and
oxygen. The equation is 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.
Q3. In a Punnett square cross between two heterozygous parents (Tt × Tt), what is the
probability of producing a homozygous recessive offspring?
A. 0%
B. 25%
C. 50%
D. 75%
,Correct Answer: B. 25% [CORRECT]
Rationale: The Punnett square yields genotypes TT (25%), Tt (50%), and tt (25%). The
homozygous recessive (tt) appears in 1 of 4 boxes, or 25%.
Q4. Which chamber of the heart pumps oxygenated blood to the body?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Correct Answer: D. Left ventricle [CORRECT]
Rationale: The left ventricle pumps oxygen-rich blood through the aorta to systemic
circulation. The right side handles deoxygenated blood to the lungs.
Q5. Gas exchange in the lungs occurs primarily in which structure?
A. Bronchi
B. Alveoli
C. Trachea
D. Diaphragm
Correct Answer: B. Alveoli [CORRECT]
Rationale: Alveoli are microscopic air sacs where oxygen diffuses into blood and carbon
dioxide diffuses out. Their thin walls and large surface area maximize gas exchange
efficiency.
Q6. Which enzyme in the mouth begins the chemical digestion of carbohydrates?
A. Pepsin
B. Amylase
C. Lipase
D. Trypsin
Correct Answer: B. Amylase [CORRECT]
Rationale: Salivary amylase breaks down starch into maltose. Pepsin digests proteins in
the stomach, lipase breaks down fats, and trypsin works in the small intestine.
Q7. Which part of the brain controls balance and coordination?
,A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Hypothalamus
Correct Answer: B. Cerebellum [CORRECT]
Rationale: The cerebellum, located at the back of the brain, coordinates voluntary
movements, posture, and balance. The cerebrum handles higher thinking, the medulla
controls vital functions, and the hypothalamus regulates hormones.
Q8. Which type of bone joint allows the widest range of motion?
A. Hinge joint
B. Ball-and-socket joint
C. Pivot joint
D. Suture joint
Correct Answer: B. Ball-and-socket joint [CORRECT]
Rationale: Ball-and-socket joints (shoulder, hip) permit movement in all planes—flexion,
extension, abduction, adduction, and rotation. Hinge joints (elbow, knee) only allow
flexion and extension.
Q9. In biological classification, which taxonomic rank is most specific?
A. Family
B. Genus
C. Order
D. Species
Correct Answer: D. Species [CORRECT]
Rationale: The hierarchy from broad to specific is: Kingdom → Phylum → Class → Order
→ Family → Genus → Species. Species represents organisms that can interbreed and
produce fertile offspring.
Q10. In an ecosystem, which organisms break down dead organic matter and recycle
nutrients?
A. Producers
, B. Primary consumers
C. Secondary consumers
D. Decomposers
Correct Answer: D. Decomposers [CORRECT]
Rationale: Decomposers (bacteria, fungi) break down dead organisms, returning
nutrients to the soil for producers (plants) to use. Consumers obtain energy by eating
other organisms.
Q11. Which state of matter has a definite volume but takes the shape of its container?
A. Solid
B. Liquid
C. Gas
D. Plasma
Correct Answer: B. Liquid [CORRECT]
Rationale: Liquids have fixed volume but no fixed shape—they conform to their
container. Solids have definite shape and volume; gases and plasma expand to fill their
containers.
Q12. An atom with 11 protons, 12 neutrons, and 11 electrons has an atomic mass of
approximately:
A. 11
B. 12
C. 22
D. 23
Correct Answer: D. 23 [CORRECT]
Rationale: Atomic mass ≈ protons + neutrons = 11 + 12 = 23. The 11 electrons
contribute negligible mass. This is sodium-23.
Q13. Which group on the periodic table contains elements that are highly reactive
nonmetals needing one electron to complete their outer shell?
A. Group 1
B. Group 2
C. Group 17
| Armed Services Vocational Aptitude Battery | Latest Update
| Graded A | 100% Verified Solutions | Pass Guaranteed
[Section 1: General Science (GS) - Biology, Chemistry, Physics, Health (Q1-25)]
Q1. Which organelle is responsible for producing ATP through cellular respiration?
A. Nucleus
B. Ribosome
C. Mitochondria
D. Golgi apparatus
Correct Answer: C. Mitochondria [CORRECT]
Rationale: Mitochondria are the "powerhouses" of the cell, generating ATP via cellular
respiration. The nucleus houses DNA, ribosomes synthesize proteins, and the Golgi
apparatus modifies and packages proteins.
Q2. During photosynthesis, which gas is absorbed and which gas is released?
A. Oxygen absorbed, carbon dioxide released
B. Carbon dioxide absorbed, oxygen released
C. Nitrogen absorbed, oxygen released
D. Carbon dioxide absorbed, nitrogen released
Correct Answer: B. Carbon dioxide absorbed, oxygen released [CORRECT]
Rationale: Photosynthesis uses carbon dioxide and water to produce glucose and
oxygen. The equation is 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.
Q3. In a Punnett square cross between two heterozygous parents (Tt × Tt), what is the
probability of producing a homozygous recessive offspring?
A. 0%
B. 25%
C. 50%
D. 75%
,Correct Answer: B. 25% [CORRECT]
Rationale: The Punnett square yields genotypes TT (25%), Tt (50%), and tt (25%). The
homozygous recessive (tt) appears in 1 of 4 boxes, or 25%.
Q4. Which chamber of the heart pumps oxygenated blood to the body?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Correct Answer: D. Left ventricle [CORRECT]
Rationale: The left ventricle pumps oxygen-rich blood through the aorta to systemic
circulation. The right side handles deoxygenated blood to the lungs.
Q5. Gas exchange in the lungs occurs primarily in which structure?
A. Bronchi
B. Alveoli
C. Trachea
D. Diaphragm
Correct Answer: B. Alveoli [CORRECT]
Rationale: Alveoli are microscopic air sacs where oxygen diffuses into blood and carbon
dioxide diffuses out. Their thin walls and large surface area maximize gas exchange
efficiency.
Q6. Which enzyme in the mouth begins the chemical digestion of carbohydrates?
A. Pepsin
B. Amylase
C. Lipase
D. Trypsin
Correct Answer: B. Amylase [CORRECT]
Rationale: Salivary amylase breaks down starch into maltose. Pepsin digests proteins in
the stomach, lipase breaks down fats, and trypsin works in the small intestine.
Q7. Which part of the brain controls balance and coordination?
,A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Hypothalamus
Correct Answer: B. Cerebellum [CORRECT]
Rationale: The cerebellum, located at the back of the brain, coordinates voluntary
movements, posture, and balance. The cerebrum handles higher thinking, the medulla
controls vital functions, and the hypothalamus regulates hormones.
Q8. Which type of bone joint allows the widest range of motion?
A. Hinge joint
B. Ball-and-socket joint
C. Pivot joint
D. Suture joint
Correct Answer: B. Ball-and-socket joint [CORRECT]
Rationale: Ball-and-socket joints (shoulder, hip) permit movement in all planes—flexion,
extension, abduction, adduction, and rotation. Hinge joints (elbow, knee) only allow
flexion and extension.
Q9. In biological classification, which taxonomic rank is most specific?
A. Family
B. Genus
C. Order
D. Species
Correct Answer: D. Species [CORRECT]
Rationale: The hierarchy from broad to specific is: Kingdom → Phylum → Class → Order
→ Family → Genus → Species. Species represents organisms that can interbreed and
produce fertile offspring.
Q10. In an ecosystem, which organisms break down dead organic matter and recycle
nutrients?
A. Producers
, B. Primary consumers
C. Secondary consumers
D. Decomposers
Correct Answer: D. Decomposers [CORRECT]
Rationale: Decomposers (bacteria, fungi) break down dead organisms, returning
nutrients to the soil for producers (plants) to use. Consumers obtain energy by eating
other organisms.
Q11. Which state of matter has a definite volume but takes the shape of its container?
A. Solid
B. Liquid
C. Gas
D. Plasma
Correct Answer: B. Liquid [CORRECT]
Rationale: Liquids have fixed volume but no fixed shape—they conform to their
container. Solids have definite shape and volume; gases and plasma expand to fill their
containers.
Q12. An atom with 11 protons, 12 neutrons, and 11 electrons has an atomic mass of
approximately:
A. 11
B. 12
C. 22
D. 23
Correct Answer: D. 23 [CORRECT]
Rationale: Atomic mass ≈ protons + neutrons = 11 + 12 = 23. The 11 electrons
contribute negligible mass. This is sodium-23.
Q13. Which group on the periodic table contains elements that are highly reactive
nonmetals needing one electron to complete their outer shell?
A. Group 1
B. Group 2
C. Group 17
