Free Test Prep OAT Practice Exam Questions and Answers 2026

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Total 280 Questions | Updated On: Apr 03, 2026

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Question 1

Which of the following is the largest organelle in an animal cell?

A : Mitochondrion

B : Chloroplast

C : Nucleus

D : Vacuole

E : Golgi apparatus

Answer: C

Question 2

Which of the following gives the correct order of electromagnetic radiation from the lowest frequency to the highest frequency?

A : microwaves, UHF radio waves, x-rays, visible light

B : UHF radio waves, microwaves, visible light, x-rays

C : microwaves, visible light, x-rays, UHF radio waves

D : microwaves, x-rays, visible light, UHF radio waves

Answer: B

Question 3

A square has an area of 36. If you doubled the length of the sides of the square, what will its new perimeter be?

A : 24

B : 36

C : 48

D : 52

E : 72

Answer: C

Question 4

Which of the following statements about electricity flowing through a circuit can be correctly derived from Ohm’s law?

A : Increasing the voltage decreases the current if the resistance remains unchanged.

B : Increasing the current and the resistance decreases the voltage

C : Increasing the current increases the voltage if the resistance is uncharged.

D : Decreasing the resistance increases the current if the voltage remains uncharged

Answer: C

Question 5

Which hormone is responsible for red blood cell production?

A : Prolactin

B : Aldosterone

C : ACTH

D : Oxytocin

E : Erythropoietin

Answer: A

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Total 280 Questions | Updated On: Apr 03, 2026

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