ASVAB REAL EXAM |ACTUAL QUESTIONS AND
VERIFIED ANSWERS|NEWLY UPDATED
EDITION|GRADED A+
SECTION I: GENERAL SCIENCE (GS)
Questions 1–15
1. Which of the following cellular organelles is primarily responsible for producing
adenosine triphosphate (ATP) through aerobic respiration?
• A) Ribosome
• B) Golgi apparatus
• C) Mitochondrion
• D) Endoplasmic reticulum
Rationale: The mitochondrion is known as the "powerhouse of the cell" because
it hosts the electron transport chain and oxidative phosphorylation, which
generate the majority of ATP. Ribosomes make proteins, the Golgi
modifies/packages proteins, and the ER synthesizes lipids and processes proteins.
2. (SATA) A patient presents with metabolic alkalosis. Which of the following
compensatory mechanisms would the body initiate? (Select all that apply)
• A) Increased respiratory rate
• B) Decreased respiratory rate
• C) Increased renal excretion of bicarbonate
• D) Increased renal reabsorption of hydrogen ions
Rationale: In metabolic alkalosis (high pH, high HCO₃⁻), the body compensates by
hypoventilating (decreased respiratory rate) to retain CO₂ and lower pH. Renally,
,the kidneys will excrete more bicarbonate and retain more H⁺ to correct the
imbalance. Increased respiratory rate is compensation for acidosis, not alkalosis.
3. The human heart is situated in which anatomical cavity, specifically within a
fluid-filled sac called the pericardium?
• A) Abdominal cavity
• B) Pelvic cavity
• C) Thoracic cavity
• D) Cranial cavity
Rationale: The heart is located in the thoracic cavity (specifically the
mediastinum). The pericardium is the sac surrounding it. The abdominal cavity
contains digestive organs, the pelvic cavity contains reproductive organs, and the
cranial cavity contains the brain.
4. Which element is a noble gas and has an atomic number of 18?
• A) Krypton
• B) Argon
• C) Neon
• D) Xenon
Rationale: Argon (Ar) has the atomic number 18. Krypton is 36, Neon is 10, and
Xenon is 54. Noble gases are characterized by having a full valence electron shell,
making them highly inert.
5. In the human digestive system, the majority of nutrient absorption occurs in
which structure?
• A) Stomach
, • B) Large intestine
• C) Small intestine
• D) Esophagus
Rationale: The small intestine, with its villi and microvilli, provides an enormous
surface area for the absorption of carbohydrates, proteins, fats, and most
vitamins. The stomach absorbs very little (alcohol/aspirin), and the large intestine
mainly absorbs water and electrolytes.
6. A sample of DNA has 30% adenine. What percentage of cytosine would you
expect to find?
• A) 20%
• B) 30%
• C) 40%
• D) 15%
Rationale: Chargaff's rule states A=T and G=C. If A=30%, then T=30%. That
accounts for 60%, leaving 40% for G+C. Since G and C are equal, C = 20%.
7. Which blood type is the universal donor for red blood cell transfusions?
• A) Type A
• B) Type B
• C) Type AB
• D) Type O
Rationale: Type O negative blood lacks A, B, and Rh antigens on the red cell
surface. Therefore, it will not trigger an immune response in recipients of any
other blood type, making it the universal donor.
, 8. Which layer of the Earth's atmosphere contains the ozone layer and
experiences a temperature increase with altitude?
• A) Troposphere
• B) Stratosphere
• C) Mesosphere
• D) Thermosphere
Rationale: The stratosphere houses the ozone layer. Ozone absorbs ultraviolet
(UV) radiation from the sun, which warms this layer, causing temperatures to
increase with altitude (a temperature inversion). The troposphere cools with
altitude.
9. A car accelerates uniformly from rest to 25 m/s in 5 seconds. What is the car's
acceleration?
• A) 5 m/s²
• B) 125 m/s²
• C) 0.2 m/s²
• D) 25 m/s²
Rationale: Acceleration = (Final Velocity - Initial Velocity) / Time. (25 m/s - 0 m/s)
/ 5 s = 5 m/s².
10. Which of the following is a function of the lymphatic system?
• A) Transporting oxygen to tissues
• B) Producing red blood cells
• C) Returning interstitial fluid to the bloodstream
• D) Secreting digestive enzymes
VERIFIED ANSWERS|NEWLY UPDATED
EDITION|GRADED A+
SECTION I: GENERAL SCIENCE (GS)
Questions 1–15
1. Which of the following cellular organelles is primarily responsible for producing
adenosine triphosphate (ATP) through aerobic respiration?
• A) Ribosome
• B) Golgi apparatus
• C) Mitochondrion
• D) Endoplasmic reticulum
Rationale: The mitochondrion is known as the "powerhouse of the cell" because
it hosts the electron transport chain and oxidative phosphorylation, which
generate the majority of ATP. Ribosomes make proteins, the Golgi
modifies/packages proteins, and the ER synthesizes lipids and processes proteins.
2. (SATA) A patient presents with metabolic alkalosis. Which of the following
compensatory mechanisms would the body initiate? (Select all that apply)
• A) Increased respiratory rate
• B) Decreased respiratory rate
• C) Increased renal excretion of bicarbonate
• D) Increased renal reabsorption of hydrogen ions
Rationale: In metabolic alkalosis (high pH, high HCO₃⁻), the body compensates by
hypoventilating (decreased respiratory rate) to retain CO₂ and lower pH. Renally,
,the kidneys will excrete more bicarbonate and retain more H⁺ to correct the
imbalance. Increased respiratory rate is compensation for acidosis, not alkalosis.
3. The human heart is situated in which anatomical cavity, specifically within a
fluid-filled sac called the pericardium?
• A) Abdominal cavity
• B) Pelvic cavity
• C) Thoracic cavity
• D) Cranial cavity
Rationale: The heart is located in the thoracic cavity (specifically the
mediastinum). The pericardium is the sac surrounding it. The abdominal cavity
contains digestive organs, the pelvic cavity contains reproductive organs, and the
cranial cavity contains the brain.
4. Which element is a noble gas and has an atomic number of 18?
• A) Krypton
• B) Argon
• C) Neon
• D) Xenon
Rationale: Argon (Ar) has the atomic number 18. Krypton is 36, Neon is 10, and
Xenon is 54. Noble gases are characterized by having a full valence electron shell,
making them highly inert.
5. In the human digestive system, the majority of nutrient absorption occurs in
which structure?
• A) Stomach
, • B) Large intestine
• C) Small intestine
• D) Esophagus
Rationale: The small intestine, with its villi and microvilli, provides an enormous
surface area for the absorption of carbohydrates, proteins, fats, and most
vitamins. The stomach absorbs very little (alcohol/aspirin), and the large intestine
mainly absorbs water and electrolytes.
6. A sample of DNA has 30% adenine. What percentage of cytosine would you
expect to find?
• A) 20%
• B) 30%
• C) 40%
• D) 15%
Rationale: Chargaff's rule states A=T and G=C. If A=30%, then T=30%. That
accounts for 60%, leaving 40% for G+C. Since G and C are equal, C = 20%.
7. Which blood type is the universal donor for red blood cell transfusions?
• A) Type A
• B) Type B
• C) Type AB
• D) Type O
Rationale: Type O negative blood lacks A, B, and Rh antigens on the red cell
surface. Therefore, it will not trigger an immune response in recipients of any
other blood type, making it the universal donor.
, 8. Which layer of the Earth's atmosphere contains the ozone layer and
experiences a temperature increase with altitude?
• A) Troposphere
• B) Stratosphere
• C) Mesosphere
• D) Thermosphere
Rationale: The stratosphere houses the ozone layer. Ozone absorbs ultraviolet
(UV) radiation from the sun, which warms this layer, causing temperatures to
increase with altitude (a temperature inversion). The troposphere cools with
altitude.
9. A car accelerates uniformly from rest to 25 m/s in 5 seconds. What is the car's
acceleration?
• A) 5 m/s²
• B) 125 m/s²
• C) 0.2 m/s²
• D) 25 m/s²
Rationale: Acceleration = (Final Velocity - Initial Velocity) / Time. (25 m/s - 0 m/s)
/ 5 s = 5 m/s².
10. Which of the following is a function of the lymphatic system?
• A) Transporting oxygen to tissues
• B) Producing red blood cells
• C) Returning interstitial fluid to the bloodstream
• D) Secreting digestive enzymes
