AQA A Level Biology: 50 Sample Exam
Questions with Answers
1. What type of bond joins amino acids in a protein?
A) Hydrogen bond
B) Ionic bond
C) Peptide bond
D) Disulfide bond
Answer: C) Peptide bond
2. Which organelle is the site of aerobic respiration?
A) Chloroplast
B) Mitochondrion
C) Golgi apparatus
D) Ribosome
Answer: B) Mitochondrion
3. What is the base sequence complementary to DNA strand 5’-ATCGTA-3’?
A) 5’-TAGCAT-3’
B) 3’-TAGCAT-5’
C) 3’-UAGCAU-5’
D) 5’-UAGCAU-3’
Answer: B) 3’-TAGCAT-5’
4. During which stage of mitosis do chromatids separate?
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
Answer: C) Anaphase
5. Which molecule acts as a competitive inhibitor of an enzyme?
A) Molecule that binds irreversibly
B) Molecule that binds at the active site
C) Molecule that binds at an allosteric site
D) Molecule that increases enzyme concentration
Answer: B) Molecule that binds at the active site
, 6. What is the role of ATP in cells?
A) Structural support
B) Energy storage
C) Energy transfer
D) Genetic information
Answer: C) Energy transfer
7. Which of the following is a function of the smooth endoplasmic reticulum?
A) Protein synthesis
B) Lipid synthesis
C) DNA replication
D) ATP production
Answer: B) Lipid synthesis
8. Which process produces genetically identical cells?
A) Mitosis
B) Meiosis
C) Fertilisation
D) Transcription
Answer: A) Mitosis
9. Which sugar is found in RNA?
A) Deoxyribose
B) Ribose
C) Glucose
D) Fructose
Answer: B) Ribose
10. What is the main pigment involved in photosynthesis?
A) Chlorophyll a
B) Carotene
C) Xanthophyll
D) Phycobilin
Answer: A) Chlorophyll a
11. In the light-dependent reaction, which molecule acts as the final electron acceptor?
A) NADP+
B) Oxygen
C) ATP
Questions with Answers
1. What type of bond joins amino acids in a protein?
A) Hydrogen bond
B) Ionic bond
C) Peptide bond
D) Disulfide bond
Answer: C) Peptide bond
2. Which organelle is the site of aerobic respiration?
A) Chloroplast
B) Mitochondrion
C) Golgi apparatus
D) Ribosome
Answer: B) Mitochondrion
3. What is the base sequence complementary to DNA strand 5’-ATCGTA-3’?
A) 5’-TAGCAT-3’
B) 3’-TAGCAT-5’
C) 3’-UAGCAU-5’
D) 5’-UAGCAU-3’
Answer: B) 3’-TAGCAT-5’
4. During which stage of mitosis do chromatids separate?
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
Answer: C) Anaphase
5. Which molecule acts as a competitive inhibitor of an enzyme?
A) Molecule that binds irreversibly
B) Molecule that binds at the active site
C) Molecule that binds at an allosteric site
D) Molecule that increases enzyme concentration
Answer: B) Molecule that binds at the active site
, 6. What is the role of ATP in cells?
A) Structural support
B) Energy storage
C) Energy transfer
D) Genetic information
Answer: C) Energy transfer
7. Which of the following is a function of the smooth endoplasmic reticulum?
A) Protein synthesis
B) Lipid synthesis
C) DNA replication
D) ATP production
Answer: B) Lipid synthesis
8. Which process produces genetically identical cells?
A) Mitosis
B) Meiosis
C) Fertilisation
D) Transcription
Answer: A) Mitosis
9. Which sugar is found in RNA?
A) Deoxyribose
B) Ribose
C) Glucose
D) Fructose
Answer: B) Ribose
10. What is the main pigment involved in photosynthesis?
A) Chlorophyll a
B) Carotene
C) Xanthophyll
D) Phycobilin
Answer: A) Chlorophyll a
11. In the light-dependent reaction, which molecule acts as the final electron acceptor?
A) NADP+
B) Oxygen
C) ATP
