HiSET Science: Life Science Practice Test 5

Question 1

Which of the following is NOT a function of the skeletal system?

Accepted Answer

Regulating blood glucose levels

Answer

Blood glucose regulation is a function of the endocrine system (insulin/glucagon), not the skeletal system.

Question 2

What happens during the light-dependent reactions of photosynthesis?

Accepted Answer

Light energy is used to split water and produce ATP and NADPH

Answer

Light-dependent reactions capture solar energy to split water molecules, releasing oxygen and producing ATP and NADPH for the Calvin cycle.

Question 3

A scientist discovers a new organism that has no nucleus, no membrane-bound organelles, and a single circular chromosome. This organism is best classified as:

Accepted Answer

A prokaryote

Answer

Prokaryotes lack a membrane-bound nucleus and organelles and typically have a single circular chromosome.

Question 4

Which hormone is responsible for stimulating the fight-or-flight response in the human body?

Accepted Answer

Adrenaline (epinephrine)

Answer

Adrenaline (epinephrine) is released by the adrenal glands in response to stress, triggering increased heart rate, blood flow, and alertness.

Question 5

What evidence best supports the theory that all modern species share a common ancestor?

Accepted Answer

All organisms share a nearly universal genetic code (DNA/RNA)

Answer

The near-universal genetic code (DNA → RNA → protein) shared by all life strongly supports descent from a common ancestor.

HiSET - High School Equivalency Test Practice Test

HiSET - High School Equivalency Test Practice Test

HiSET Science: Life Science Practice Test 5