FREE PSB-RN Natural Sciences (Biology, Chemistry & Physics) Questions and Answers

Question 1

Which organelle is responsible for ATP production in human cells?

Accepted Answer

Mitochondria

Answer

Nucleus

Answer

Golgi apparatus

Answer

Endoplasmic reticulum

Question 2

What is the normal pH range of human blood?

Accepted Answer

7.35-7.45

Answer

6.8-7.0

Answer

7.5-8.0

Answer

6.0-7.2

Question 3

Which law explains why intravenous fluids must be administered at specific heights?

Accepted Answer

Gravity and Hydrostatic Pressure

Answer

Ohm's Law

Answer

Bernoulli's Principle

Answer

Pascal's Law

Question 4

What type of chemical bond holds water molecules together?

Accepted Answer

Hydrogen bonds

Answer

Ionic bonds

Answer

Covalent bonds

Answer

Metallic bonds

Question 5

Which blood vessels carry oxygenated blood from the lungs to the heart?

Accepted Answer

Pulmonary veins

Answer

Pulmonary arteries

Answer

Coronary arteries

Answer

Aorta

Question 6

What is the primary function of red blood cells?

Accepted Answer

Transport oxygen

Answer

Fight infection

Answer

Produce antibodies

Answer

Form blood clots

Question 7

Which gas law explains why a sealed IV bag expands at higher altitudes?

Accepted Answer

Boyle's Law

Answer

Charles's Law

Answer

Avogadro's Law

Answer

Henry's Law

Question 8

What is the chemical symbol for potassium?

Accepted Answer

K

Answer

P

Answer

Pt

Answer

Ko

Question 9

Which process describes the movement of water across a semipermeable membrane?

Accepted Answer

Osmosis

Answer

Diffusion

Answer

Active transport

Answer

Filtration