AQA A-LEVEL BIOLOGY COMPLETE QUESTIONS AND
ANSWERS WITH VERIFIED SOLUTION GRADE A+
1. Which of the following best describes the function of ribosomes?
A) Synthesizing proteins
B) Producing ATP
C) Replicating DNA
D) Storing genetic information
Answer: A) Synthesizing proteins
Rationale: Ribosomes are responsible for protein synthesis in cells by
translating mRNA into amino acid sequences.
2. Which of the following is a characteristic of prokaryotic cells?
A. Nucleus
B. Membrane-bound organelles
C. Circular DNA
D. Large size
Answer: C) Circular DNA
Rationale: Prokaryotic cells lack a nucleus and membrane-bound
organelles, and their DNA is typically circular and located in the
cytoplasm.
3. What is the primary role of the Golgi apparatus?
A. Protein synthesis
B. Packaging and modifying proteins
,C. Lipid metabolism
D. Cellular respiration
Answer: B) Packaging and modifying proteins
Rationale: The Golgi apparatus modifies, sorts, and packages proteins
for secretion or use within the cell.
4. Which of the following structures are found in plant cells but not in
animal cells?
A. Nucleus
B. Chloroplasts
C. Ribosomes
D. Mitochondria
Answer: B) Chloroplasts
Rationale: Chloroplasts are responsible for photosynthesis in plant
cells, and they are absent in animal cells.
5. The process by which a cell divides to produce two genetically
identical daughter cells is called:
A. Meiosis
B. Binary fission
C. Mitosis
D. Fertilization
Answer: C) Mitosis
, Rationale: Mitosis is the process by which a cell divides to produce two
genetically identical daughter cells.
6. Which of the following statements about enzymes is correct?
A. Enzymes are consumed in reactions
B. Enzymes increase the activation energy of a reaction
C. Enzymes lower the activation energy of a reaction
D. Enzymes work best at low temperatures
Answer: C) Enzymes lower the activation energy of a reaction
Rationale: Enzymes act as catalysts by lowering the activation energy
required for a reaction to proceed.
7. What is the role of the enzyme amylase?
A. Breaking down proteins
B. Breaking down carbohydrates
C. Breaking down lipids
D. Breaking down nucleic acids
Answer: B) Breaking down carbohydrates
Rationale: Amylase is an enzyme that breaks down starches and other
carbohydrates into simple sugars.
8. The Calvin cycle occurs in which part of the chloroplast?
A. Thylakoid membranes
ANSWERS WITH VERIFIED SOLUTION GRADE A+
1. Which of the following best describes the function of ribosomes?
A) Synthesizing proteins
B) Producing ATP
C) Replicating DNA
D) Storing genetic information
Answer: A) Synthesizing proteins
Rationale: Ribosomes are responsible for protein synthesis in cells by
translating mRNA into amino acid sequences.
2. Which of the following is a characteristic of prokaryotic cells?
A. Nucleus
B. Membrane-bound organelles
C. Circular DNA
D. Large size
Answer: C) Circular DNA
Rationale: Prokaryotic cells lack a nucleus and membrane-bound
organelles, and their DNA is typically circular and located in the
cytoplasm.
3. What is the primary role of the Golgi apparatus?
A. Protein synthesis
B. Packaging and modifying proteins
,C. Lipid metabolism
D. Cellular respiration
Answer: B) Packaging and modifying proteins
Rationale: The Golgi apparatus modifies, sorts, and packages proteins
for secretion or use within the cell.
4. Which of the following structures are found in plant cells but not in
animal cells?
A. Nucleus
B. Chloroplasts
C. Ribosomes
D. Mitochondria
Answer: B) Chloroplasts
Rationale: Chloroplasts are responsible for photosynthesis in plant
cells, and they are absent in animal cells.
5. The process by which a cell divides to produce two genetically
identical daughter cells is called:
A. Meiosis
B. Binary fission
C. Mitosis
D. Fertilization
Answer: C) Mitosis
, Rationale: Mitosis is the process by which a cell divides to produce two
genetically identical daughter cells.
6. Which of the following statements about enzymes is correct?
A. Enzymes are consumed in reactions
B. Enzymes increase the activation energy of a reaction
C. Enzymes lower the activation energy of a reaction
D. Enzymes work best at low temperatures
Answer: C) Enzymes lower the activation energy of a reaction
Rationale: Enzymes act as catalysts by lowering the activation energy
required for a reaction to proceed.
7. What is the role of the enzyme amylase?
A. Breaking down proteins
B. Breaking down carbohydrates
C. Breaking down lipids
D. Breaking down nucleic acids
Answer: B) Breaking down carbohydrates
Rationale: Amylase is an enzyme that breaks down starches and other
carbohydrates into simple sugars.
8. The Calvin cycle occurs in which part of the chloroplast?
A. Thylakoid membranes
