High School Biochemistry Essentials

Biochemistry

A collection of fundamental biochemistry questions covering biomolecules, enzymes, and cell energetics suitable for high school students.

biology chemistry science education

12 Questions Easy Ages 14+ Aug 11, 2026

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About this Study Set

This study set covers Biochemistry through 12 practice questions. A collection of fundamental biochemistry questions covering biomolecules, enzymes, and cell energetics suitable for high school students. 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 12 questions from the High School Biochemistry Essentials study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which polysaccharide is the primary energy storage molecule in plants?

A Glycogen
B Starch
C Cellulose
D Chitin

2 Which component makes up the 'backbone' of a DNA molecule?

A Nitrogenous bases
B Deoxyribose sugar and phosphate groups
C Amino acids
D Hydrogen bonds

3 What are the individual monomer units that make up proteins?

A Nucleotides
B Monosaccharides
C Amino acids
D Fatty acids

4 Which element is found in all organic molecules?

A Nitrogen
B Carbon
C Iron
D Sulfur

5 What is the function of enzymes in biochemical reactions?

A To act as a fuel source
B To increase activation energy
C To speed up reaction rates
D To store genetic information

6 Which type of bond links amino acids together in a polypeptide chain?

A Peptide bond
B Ionic bond
C Hydrogen bond
D Glycosidic bond

7 What is the primary role of adenosine triphosphate (ATP) in cells?

A Storing genetic data
B Providing energy for cellular work
C Building cell walls
D Catalyzing chemical reactions

8 Which lipid is the primary structural component of the cell membrane?

A Triglyceride
B Steroid
C Phospholipid
D Wax

9 What is the main sugar used by cells for immediate energy?

A Fructose
B Glucose
C Lactose
D Sucrose

10 Which nitrogenous base is found in RNA but not in DNA?

A Adenine
B Cytosine
C Uracil
D Guanine

11 What determines the specific function of a protein?

A Its 3D shape and structure
B The color of the cell
C The number of phosphate groups
D The presence of sulfur only

12 Which term describes the 'optimal' temperature at which an enzyme functions most efficiently?

A Denaturation point
B Active site
C Optimal temperature
D Inhibition point

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