Biology 101 Final Exam 2026-2027: 80
Practice Questions & Answers on
Macromolecules, Cells, Genetics &
Bioinformatics | University Study Guide for
Exam Prep Success
Description:
Pass your Biology 101 final with this comprehensive 2026/2027 exam paper featuring 80
original questions on macromolecules, prokaryotic vs. eukaryotic cells, DNA/RNA,
protein structure, and bioinformatics.
Includes detailed explanations for every answer
Download the 2026/2027 Biology 101 Exam Prep Guide – Master Your Final, Ace Your Grade,
and Walk Into Exam Day Confident.
, Biology 101 Final Exam 2026-2027 | 80 Questions & Answers
Section A: Biological Macromolecules (40 Marks)
Question 1 (1 Mark)
What is the basic monomeric unit of carbohydrates?
A. Amino acids
B. Nucleotides
C. Monosaccharides
D. Fatty acids
Answer: C
Explanation: Monosaccharides, such as glucose and fructose, are the simplest form of
carbohydrates and serve as the building blocks for more complex sugars and starches.
Question 2 (1 Mark)
Lipids are primarily composed of which two types of smaller molecules?
A. Nucleotides and phosphates
B. Amino acids and peptides
C. Monosaccharides and disaccharides
D. Fatty acids and glycerol
Answer: D
Explanation: While fatty acids are a key component, the basic unit of most lipids (like
triglycerides) is a glycerol backbone bonded to three fatty acids. This reflects current 2026
curriculum standards on lipid structure.
Question 3 (1 Mark)
The covalent bond formed between the carboxyl group of one amino acid and the amino
group of another is known as a:
A. Hydrogen bond
B. Peptide bond
C. Disulfide bridge
D. Ester linkage
Answer: B
,Explanation: A peptide bond is a specific type of covalent bond, critical for linking amino
acids into polypeptide chains during protein synthesis.
Question 4 (1 Mark)
Which nitrogenous base is found in RNA but not in DNA?
A. Guanine (G)
B. Cytosine (C)
C. Thymine (T)
D. Uracil (U)
Answer: D
Explanation: RNA replaces thymine with uracil. This substitution is a key molecular
distinction between the two nucleic acids and is essential for RNA's role in protein synthesis.
Question 5 (1 Mark)
Which level of protein structure refers to the linear sequence of amino acids?
A. Primary
B. Secondary
C. Tertiary
D. Quaternary
Answer: A
Explanation: The primary structure is the foundation of all higher-level protein folding.
Secondary structure (alpha helices, beta sheets) arises from hydrogen bonding within this
sequence.
Question 6 (1 Mark)
A bioinformatics approach would be most appropriate for:
A. Directly observing ribosome function under an electron microscope.
B. Analyzing genomic sequences from 10,000 bacterial species to find evolutionary patterns.
C. Synthesizing a new fatty acid in a wet laboratory.
D. Measuring the energy content of a monosaccharide.
Answer: B
, Explanation: Bioinformatics explicitly involves the use of computational tools and
mathematical models to process and integrate large biological datasets, such as genomic
sequences.
Question 7 (4 Marks)
Match each macromolecule (Column A) with its primary function (Column B). Write the
correct letter next to the number.
Column A: Macromolecule Column B: Primary Function
7.1 Carbohydrates A. Catalyzing biochemical reactions (as enzymes) & providing structure
7.2 Lipids B. Storing and transmitting genetic information (genes/genome)
7.3 Proteins C. Long-term energy storage, insulation, and membrane structure
7.4 Nucleic Acids D. Immediate energy source and short-term energy storage
Answers:
7.1 – D
7.2 – C
7.3 – A
7.4 – B
Explanation for 7.3: While proteins have diverse functions (storage, hormonal, contractile,
defensive, transport, receptor, structural), their core role includes catalysis (enzymes) and
cellular architecture.
Question 8 (2 Marks)
List two specific examples of proteins and state one function for each example provided.
Answer:
Hemoglobin: Transports oxygen in red blood cells.
Insulin: Hormonal function; regulates blood glucose levels.
Practice Questions & Answers on
Macromolecules, Cells, Genetics &
Bioinformatics | University Study Guide for
Exam Prep Success
Description:
Pass your Biology 101 final with this comprehensive 2026/2027 exam paper featuring 80
original questions on macromolecules, prokaryotic vs. eukaryotic cells, DNA/RNA,
protein structure, and bioinformatics.
Includes detailed explanations for every answer
Download the 2026/2027 Biology 101 Exam Prep Guide – Master Your Final, Ace Your Grade,
and Walk Into Exam Day Confident.
, Biology 101 Final Exam 2026-2027 | 80 Questions & Answers
Section A: Biological Macromolecules (40 Marks)
Question 1 (1 Mark)
What is the basic monomeric unit of carbohydrates?
A. Amino acids
B. Nucleotides
C. Monosaccharides
D. Fatty acids
Answer: C
Explanation: Monosaccharides, such as glucose and fructose, are the simplest form of
carbohydrates and serve as the building blocks for more complex sugars and starches.
Question 2 (1 Mark)
Lipids are primarily composed of which two types of smaller molecules?
A. Nucleotides and phosphates
B. Amino acids and peptides
C. Monosaccharides and disaccharides
D. Fatty acids and glycerol
Answer: D
Explanation: While fatty acids are a key component, the basic unit of most lipids (like
triglycerides) is a glycerol backbone bonded to three fatty acids. This reflects current 2026
curriculum standards on lipid structure.
Question 3 (1 Mark)
The covalent bond formed between the carboxyl group of one amino acid and the amino
group of another is known as a:
A. Hydrogen bond
B. Peptide bond
C. Disulfide bridge
D. Ester linkage
Answer: B
,Explanation: A peptide bond is a specific type of covalent bond, critical for linking amino
acids into polypeptide chains during protein synthesis.
Question 4 (1 Mark)
Which nitrogenous base is found in RNA but not in DNA?
A. Guanine (G)
B. Cytosine (C)
C. Thymine (T)
D. Uracil (U)
Answer: D
Explanation: RNA replaces thymine with uracil. This substitution is a key molecular
distinction between the two nucleic acids and is essential for RNA's role in protein synthesis.
Question 5 (1 Mark)
Which level of protein structure refers to the linear sequence of amino acids?
A. Primary
B. Secondary
C. Tertiary
D. Quaternary
Answer: A
Explanation: The primary structure is the foundation of all higher-level protein folding.
Secondary structure (alpha helices, beta sheets) arises from hydrogen bonding within this
sequence.
Question 6 (1 Mark)
A bioinformatics approach would be most appropriate for:
A. Directly observing ribosome function under an electron microscope.
B. Analyzing genomic sequences from 10,000 bacterial species to find evolutionary patterns.
C. Synthesizing a new fatty acid in a wet laboratory.
D. Measuring the energy content of a monosaccharide.
Answer: B
, Explanation: Bioinformatics explicitly involves the use of computational tools and
mathematical models to process and integrate large biological datasets, such as genomic
sequences.
Question 7 (4 Marks)
Match each macromolecule (Column A) with its primary function (Column B). Write the
correct letter next to the number.
Column A: Macromolecule Column B: Primary Function
7.1 Carbohydrates A. Catalyzing biochemical reactions (as enzymes) & providing structure
7.2 Lipids B. Storing and transmitting genetic information (genes/genome)
7.3 Proteins C. Long-term energy storage, insulation, and membrane structure
7.4 Nucleic Acids D. Immediate energy source and short-term energy storage
Answers:
7.1 – D
7.2 – C
7.3 – A
7.4 – B
Explanation for 7.3: While proteins have diverse functions (storage, hormonal, contractile,
defensive, transport, receptor, structural), their core role includes catalysis (enzymes) and
cellular architecture.
Question 8 (2 Marks)
List two specific examples of proteins and state one function for each example provided.
Answer:
Hemoglobin: Transports oxygen in red blood cells.
Insulin: Hormonal function; regulates blood glucose levels.
