Science Practice Questions — Set 1

Question 1

What is the basic unit of life?

Accepted Answer

Cell

Answer

Organ

Answer

Organism

Answer

Tissue

Question 2

Which organelle is responsible for energy production in a cell?

Accepted Answer

Mitochondrion

Answer

Golgi apparatus

Answer

Nucleus

Answer

Ribosome

Question 3

What is the process by which plants make their own food?

Accepted Answer

Photosynthesis

Answer

Fermentation

Answer

Respiration

Answer

Digestion

Question 4

How many chromosomes does a human cell typically have?

Accepted Answer

46

Answer

48

Answer

92

Answer

23

Question 5

What is the function of hemoglobin?

Accepted Answer

Transport oxygen

Answer

Fight infection

Answer

Digest food

Answer

Regulate temperature

Question 6

Which of the following is a nucleotide?

Accepted Answer

Deoxyribose + Phosphate + Nitrogenous base

Answer

Glucose

Answer

Fatty acid

Answer

Amino acid

Question 7

What is the pH range for acidic solutions?

Accepted Answer

0-7

Answer

0-6

Answer

8-14

Answer

7-14

Question 8

What is the most abundant gas in Earth's atmosphere?

Accepted Answer

Nitrogen

Answer

Oxygen

Answer

Carbon dioxide

Answer

Hydrogen

Question 9

Which element has the atomic number 6?

Accepted Answer

Carbon

Answer

Oxygen

Answer

Hydrogen

Answer

Nitrogen

Question 10

What is the chemical formula for table salt?

Accepted Answer

NaCl

Answer

MgCl₂

Answer

CaCl₂

Answer

KCl