ASVAB General Science Practice Test: Life Science and the Human Body
- Life Science and the Human Body
- 10 questions
- 8 minutes
This test covers the life science part of General Science: cells, heredity, ecosystems and how the main systems of the human body work. Read every option before choosing, because several may name real body parts.
Tap an option to mark your answer. You can change your mind, or tap the same option again to leave the question blank. The correct answers and explanations appear when you finish the test.Tap an option to answer; tap it again to leave the question blank.
Your result
- 0 correct
- 0 wrong
- 0 blank
-
Question 1
Which blood cells are mainly responsible for fighting infection?
Correct answer: C
White blood cells find and destroy germs. Red blood cells carry oxygen, platelets help blood clot, and plasma is the liquid part of blood, not a cell.
-
Question 2
A section of DNA that carries the instructions for one trait and is passed from parents to offspring is called a
Correct answer: B
Genes are the units of heredity found on chromosomes. A ribosome builds proteins and a vacuole stores water and other materials, but neither is inherited as a trait.
-
Question 3
Which organ produces bile, which helps the body digest fats?
Correct answer: D
The liver makes bile. The gallbladder only stores and releases it, which makes it the most common trap in this question.
-
Question 4
In the lungs, oxygen passes into the blood through the walls of tiny air sacs called
Correct answer: A
Alveoli are thin-walled air sacs surrounded by capillaries, where oxygen and carbon dioxide are exchanged. The bronchi are tubes that carry air to them.
-
Question 5
In a food chain of grass → rabbit → fox, the grass is a
Correct answer: B
Grass makes its own food through photosynthesis, so it is a producer. The rabbit, which eats the grass, is the primary consumer.
-
Question 6
Which part of a cell releases energy from food through cellular respiration?
Correct answer: A
Mitochondria break down sugar to release usable energy. Chloroplasts do the opposite job: they capture light energy to make sugar in plant cells.
-
Question 7
Which hormone lowers the level of sugar in the blood?
Correct answer: D
Insulin, made by the pancreas, helps cells take in sugar from the blood. Glucagon, also from the pancreas, does the opposite and raises blood sugar.
-
Question 8
What is the longest bone in the human body?
Correct answer: C
The femur, or thighbone, is the longest and strongest bone in the body. The tibia is the larger lower-leg bone but is shorter than the femur.
-
Question 9
The skin makes which vitamin when it is exposed to sunlight?
Correct answer: D
Sunlight on the skin starts the production of vitamin D, which the body needs to absorb calcium. Vitamin C must come from food such as fruit and vegetables.
-
Question 10
How many chromosomes are found in a typical human body cell?
Correct answer: B
Human body cells have 46 chromosomes in 23 pairs. Egg and sperm cells carry only 23, which is the usual trap.
Questions you leave blank are not counted as wrong.
More General Science tests
General ScienceASVAB General Science Practice Test: Physical Science (Chemistry and Physics)Physical Science: Chemistry and Physics10 questions8 min General ScienceASVAB General Science Practice TestLife, Earth and Physical Science15 questions9 minGeneral ScienceASVAB General Science Practice Test: Earth and Space ScienceEarth and Space Science10 questions15 min