AQA A-LEVEL BIOLOGY COMPLETE QUESTIONS AND
ANSWERS WITH VERIFIED SOLUTION GRADE A+
1. What is the function of the cell membrane?
A. Contains genetic material
B. Synthesizes proteins
C. Regulates the movement of substances into and out of the cell
D. Provides energy for cellular activities
Answer: C) Regulates the movement of substances into and out of the
cell
Rationale: The cell membrane controls the entry and exit of substances,
maintaining homeostasis within the cell.
2. Which of the following types of RNA carries genetic information
from DNA to the ribosome?
A. rRNA
B. tRNA
C. mRNA
D. miRNA
Answer: C) mRNA
Rationale: mRNA (messenger RNA) carries the genetic code from
DNA to the ribosome for protein synthesis.
,3. Which process is responsible for creating genetic variation in
sexually reproducing organisms?
A. Mutation
B. Meiosis
C. Mitosis
D. Replication
Answer: B) Meiosis
Rationale: Meiosis generates genetic diversity through processes like
crossing over and independent assortment of chromosomes.
4. Which type of bond forms between the amino acids in a protein?
A. Hydrogen bonds
B. Ionic bonds
C. Peptide bonds
D. Covalent bonds
Answer: C) Peptide bonds
Rationale: Peptide bonds link amino acids together in a polypeptide
chain, forming proteins.
5. Which process results in the formation of mRNA from a DNA
template?
A. Translation
B. Replication
C. Transcription
, D. Transformation
Answer: C) Transcription
Rationale: Transcription is the process by which RNA, specifically
mRNA, is synthesized from a DNA template.
6. In which stage of the cell cycle does DNA replication occur?
A. G1
B. S phase
C. G2
D. M phase
Answer: B) S phase
Rationale: DNA replication occurs during the S phase of interphase,
ensuring each daughter cell receives a full set of chromosomes.
7. What is the final electron acceptor in the electron transport chain?
A. Oxygen
B. Carbon dioxide
C. Glucose
D. NADP+
Answer: A) Oxygen
Rationale: Oxygen is the final electron acceptor in the electron
transport chain, where it combines with electrons and protons to form
water.
ANSWERS WITH VERIFIED SOLUTION GRADE A+
1. What is the function of the cell membrane?
A. Contains genetic material
B. Synthesizes proteins
C. Regulates the movement of substances into and out of the cell
D. Provides energy for cellular activities
Answer: C) Regulates the movement of substances into and out of the
cell
Rationale: The cell membrane controls the entry and exit of substances,
maintaining homeostasis within the cell.
2. Which of the following types of RNA carries genetic information
from DNA to the ribosome?
A. rRNA
B. tRNA
C. mRNA
D. miRNA
Answer: C) mRNA
Rationale: mRNA (messenger RNA) carries the genetic code from
DNA to the ribosome for protein synthesis.
,3. Which process is responsible for creating genetic variation in
sexually reproducing organisms?
A. Mutation
B. Meiosis
C. Mitosis
D. Replication
Answer: B) Meiosis
Rationale: Meiosis generates genetic diversity through processes like
crossing over and independent assortment of chromosomes.
4. Which type of bond forms between the amino acids in a protein?
A. Hydrogen bonds
B. Ionic bonds
C. Peptide bonds
D. Covalent bonds
Answer: C) Peptide bonds
Rationale: Peptide bonds link amino acids together in a polypeptide
chain, forming proteins.
5. Which process results in the formation of mRNA from a DNA
template?
A. Translation
B. Replication
C. Transcription
, D. Transformation
Answer: C) Transcription
Rationale: Transcription is the process by which RNA, specifically
mRNA, is synthesized from a DNA template.
6. In which stage of the cell cycle does DNA replication occur?
A. G1
B. S phase
C. G2
D. M phase
Answer: B) S phase
Rationale: DNA replication occurs during the S phase of interphase,
ensuring each daughter cell receives a full set of chromosomes.
7. What is the final electron acceptor in the electron transport chain?
A. Oxygen
B. Carbon dioxide
C. Glucose
D. NADP+
Answer: A) Oxygen
Rationale: Oxygen is the final electron acceptor in the electron
transport chain, where it combines with electrons and protons to form
water.
