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Introduction to Biochemistry

Biochemistry

A basic overview of the chemical building blocks of life.

science biology chemistry

18 Questions Easy Ages 5+ Apr 23, 2026

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About this Study Set

This study set covers Biochemistry through 18 practice questions. A basic overview of the chemical building blocks of life. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

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Browse all 18 questions from the Introduction to Biochemistry study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which molecule is the primary source of energy for the human body?

A Glucose
B Iron
C Oxygen
D Calcium

2 What are the building blocks of proteins called?

A Nucleotides
B Amino acids
C Fatty acids
D Minerals

3 Which substance makes up the majority of the human body's weight?

A Protein
B Fat
C Water
D Sugar

4 What is the chemical name for common table sugar?

A Sucrose
B Fructose
C Lactose
D Glucose

5 Which type of nutrient is used by the body for long-term energy storage?

A Vitamins
B Minerals
C Fats
D Proteins

6 What is the main function of enzymes in the body?

A To build bones
B To speed up chemical reactions
C To carry oxygen
D To store genetic information

7 Which organelle is known as the powerhouse of the cell because it produces energy?

A Nucleus
B Ribosome
C Mitochondrion
D Cell wall

8 What element is found in all organic molecules?

A Gold
B Carbon
C Silver
D Iron

9 Which molecule carries genetic instructions for all living things?

A RNA
B DNA
C Protein
D Lipid

10 What is the primary function of Vitamin C in the human body?

A To strengthen bones
B To support the immune system
C To build muscle
D To store energy

11 Which gas do humans inhale that is used in cellular respiration to create energy?

A Carbon dioxide
B Nitrogen
C Oxygen
D Helium

12 What is the main byproduct of cellular respiration that humans exhale?

A Oxygen
B Hydrogen
C Carbon dioxide
D Methane

13 Which nutrient is essential for building and repairing muscle tissue?

A Protein
B Starch
C Sugar
D Salt

14 What do plants produce during the process of photosynthesis?

A Glucose
B Protein
C Iron
D Fat

15 Which mineral is essential for healthy bones and teeth?

A Calcium
B Sodium
C Potassium
D Magnesium

16 What is the scientific term for the total of all chemical reactions occurring in an organism?

A Digestion
B Metabolism
C Circulation
D Respiration

17 Which of these is a complex carbohydrate found in plants?

A Starch
B Glucose
C Fructose
D Sucrose

18 What type of molecule acts as a biological catalyst?

A Vitamin
B Enzyme
C Mineral
D Sugar

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