About this Study Set
This study set covers Biochemistry through
20 practice questions.
A collection of basic, fact-based questions covering core concepts in biochemistry. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 20 questions from the
Fundamentals of Biochemistry study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
What is the primary function of enzymes in biological systems?
-
A
To store genetic information
-
B
To transport oxygen
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C
To speed up chemical reactions
-
D
To provide structural support
2
Which of the following is a major class of biological macromolecules essential for energy storage and cell membrane structure?
-
A
Nucleic acids
-
B
Proteins
-
C
Carbohydrates
-
D
Lipids
3
What is the main energy currency of the cell?
-
A
Glucose
-
B
DNA
-
C
ATP
-
D
RNA
4
Which biological molecule carries the genetic instructions for the development, functioning, growth, and reproduction of all known organisms?
-
A
ATP
-
B
RNA
-
C
Proteins
-
D
DNA
5
What are the building blocks of proteins?
-
A
Nucleotides
-
B
Monosaccharides
-
C
Amino acids
-
D
Fatty acids
6
What process do plants use to convert light energy into chemical energy in the form of glucose?
-
A
Respiration
-
B
Fermentation
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C
Photosynthesis
-
D
Digestion
7
Which element is central to the structure of all organic molecules?
-
A
Oxygen
-
B
Nitrogen
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C
Sulfur
-
D
Carbon
8
What is the primary function of carbohydrates in living organisms?
-
A
Catalysis of reactions
-
B
Energy source and structural components
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C
Information storage
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D
Defense against pathogens
9
Which type of molecule is responsible for catalyzing biochemical reactions?
-
A
Lipids
-
B
Carbohydrates
-
C
Nucleic acids
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D
Enzymes
10
What are the basic units that make up nucleic acids like DNA and RNA?
-
A
Amino acids
-
B
Monosaccharides
-
C
Nucleotides
-
D
Fatty acids
11
A molecule that donates a hydrogen ion (H+) in solution is called:
-
A
A base
-
B
A salt
-
C
An acid
-
D
A buffer
12
What is the primary role of lipids in the body?
-
A
Building muscle tissue
-
B
Transporting oxygen
-
C
Long-term energy storage and forming cell membranes
-
D
Carrying genetic information
13
Which of the following is NOT one of the four major classes of biological macromolecules?
-
A
Proteins
-
B
Carbohydrates
-
C
Minerals
-
D
Lipids
14
The sequence of amino acids in a protein determines its:
-
A
Energy storage capacity
-
B
Solubility in water
-
C
3D structure and function
-
D
Rate of replication
15
What is the process by which cells break down glucose to produce ATP and other energy molecules?
-
A
Photosynthesis
-
B
DNA replication
-
C
Cellular respiration
-
D
Protein synthesis
16
Water is often called the 'universal solvent' because:
-
A
It is a very strong acid
-
B
It can dissolve many different substances
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C
It is a gas at room temperature
-
D
It is primarily made of carbon
17
What is the term for a molecule that is a direct product of a metabolic pathway and is then used as a substrate for another metabolic pathway?
-
A
Enzyme
-
B
Hormone
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C
Metabolite
-
D
Antibody
18
Which type of bond holds together the two strands of a DNA molecule?
-
A
Covalent bonds
-
B
Ionic bonds
-
C
Hydrogen bonds
-
D
Peptide bonds
19
Which of these is a common monosaccharide?
-
A
Sucrose
-
B
Starch
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C
Fructose
-
D
Cellulose
20
What is the process called when RNA is synthesized from a DNA template?
-
A
Translation
-
B
Replication
-
C
Transcription
-
D
Mutation
