Pearson Edexcel A Level Biology: 50 Sample
Questions with Answers
1. Which type of bond holds the two strands of DNA together?
A) Peptide bond
B) Hydrogen bond
C) Ionic bond
D) Covalent bond
Answer: B) Hydrogen bond
2. What is the function of ribosomes?
A) DNA replication
B) Protein synthesis
C) Lipid production
D) Energy production
Answer: B) Protein synthesis
3. Which organelle is responsible for aerobic respiration?
A) Chloroplast
B) Mitochondrion
C) Golgi apparatus
D) Lysosome
Answer: B) Mitochondrion
4. What is the complementary base to adenine in DNA?
A) Cytosine
B) Thymine
C) Guanine
D) Uracil
Answer: B) Thymine
5. During which phase of mitosis do chromosomes align at the equator?
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
Answer: B) Metaphase
6. Which molecule acts as the energy currency of the cell?
A) ATP
B) ADP
C) NADH
D) FADH2
Answer: A) ATP
7. What is the main function of the Golgi apparatus?
A) Protein modification and packaging
B) Lipid synthesis
, C) ATP production
D) Photosynthesis
Answer: A) Protein modification and packaging
8. Which enzyme unwinds the DNA double helix during replication?
A) DNA polymerase
B) DNA ligase
C) Helicase
D) RNA polymerase
Answer: C) Helicase
9. What is the function of the enzyme amylase?
A) Break down lipids
B) Break down proteins
C) Break down starch
D) Synthesize glucose
Answer: C) Break down starch
10. What type of mutation results in no change to the amino acid sequence?
A) Missense
B) Nonsense
C) Silent
D) Frameshift
Answer: C) Silent
11. Which blood vessel carries blood from the lungs to the heart?
A) Pulmonary artery
B) Pulmonary vein
C) Aorta
D) Vena cava
Answer: B) Pulmonary vein
12. What is the role of insulin?
A) Increase blood glucose
B) Decrease blood glucose
C) Stimulate adrenaline release
D) Stimulate glucagon release
Answer: B) Decrease blood glucose
13. Which structure regulates the passage of substances into and out of the cell?
A) Cell wall
B) Cytoplasm
C) Cell membrane
D) Nucleus
Answer: C) Cell membrane
14. In which organelle does photosynthesis occur?
A) Mitochondrion
B) Chloroplast
C) Ribosome
D) Golgi body
Answer: B) Chloroplast
Questions with Answers
1. Which type of bond holds the two strands of DNA together?
A) Peptide bond
B) Hydrogen bond
C) Ionic bond
D) Covalent bond
Answer: B) Hydrogen bond
2. What is the function of ribosomes?
A) DNA replication
B) Protein synthesis
C) Lipid production
D) Energy production
Answer: B) Protein synthesis
3. Which organelle is responsible for aerobic respiration?
A) Chloroplast
B) Mitochondrion
C) Golgi apparatus
D) Lysosome
Answer: B) Mitochondrion
4. What is the complementary base to adenine in DNA?
A) Cytosine
B) Thymine
C) Guanine
D) Uracil
Answer: B) Thymine
5. During which phase of mitosis do chromosomes align at the equator?
A) Prophase
B) Metaphase
C) Anaphase
D) Telophase
Answer: B) Metaphase
6. Which molecule acts as the energy currency of the cell?
A) ATP
B) ADP
C) NADH
D) FADH2
Answer: A) ATP
7. What is the main function of the Golgi apparatus?
A) Protein modification and packaging
B) Lipid synthesis
, C) ATP production
D) Photosynthesis
Answer: A) Protein modification and packaging
8. Which enzyme unwinds the DNA double helix during replication?
A) DNA polymerase
B) DNA ligase
C) Helicase
D) RNA polymerase
Answer: C) Helicase
9. What is the function of the enzyme amylase?
A) Break down lipids
B) Break down proteins
C) Break down starch
D) Synthesize glucose
Answer: C) Break down starch
10. What type of mutation results in no change to the amino acid sequence?
A) Missense
B) Nonsense
C) Silent
D) Frameshift
Answer: C) Silent
11. Which blood vessel carries blood from the lungs to the heart?
A) Pulmonary artery
B) Pulmonary vein
C) Aorta
D) Vena cava
Answer: B) Pulmonary vein
12. What is the role of insulin?
A) Increase blood glucose
B) Decrease blood glucose
C) Stimulate adrenaline release
D) Stimulate glucagon release
Answer: B) Decrease blood glucose
13. Which structure regulates the passage of substances into and out of the cell?
A) Cell wall
B) Cytoplasm
C) Cell membrane
D) Nucleus
Answer: C) Cell membrane
14. In which organelle does photosynthesis occur?
A) Mitochondrion
B) Chloroplast
C) Ribosome
D) Golgi body
Answer: B) Chloroplast
