BIOD 210 GENETICS FINAL REAL QUESTIONS + DETAILED
ANSWERS - LATEST VERSION - TOP RATED (2026/2027)
1. What is the complementary base pair for adenine in DNA?
• A) Guanine
• B) Cytosine
• C) Thymine ANSWER
• D) Uracil
2. DNA replication is described as:
• A) Conservative
• B) Semi-conservative ANSWER
• C) Dispersive
• D) Additive
3. Which enzyme unwinds the DNA double helix during replication?
• A) DNA polymerase
• B) Ligase
• C) Helicase ANSWER
• D) Primase
4. Which enzyme adds nucleotides to the growing DNA strand?
• A) Helicase
• B) DNA polymerase ANSWER
• C) Topoisomerase
• D) RNA polymerase
5. DNA polymerase adds nucleotides in which direction?
• A) 3' to 5'
• B) 5' to 3' ANSWER
• C) Both directions
, • D) Random
6. What is the purpose of a primer in DNA replication?
• A) To unwind DNA
• B) To provide a free 3'-OH for polymerase ANSWER
• C) To join Okazaki fragments
• D) To proofread
7. Okazaki fragments are found on which strand?
• A) Leading strand
• B) Lagging strand ANSWER
• C) Template strand
• D) Coding strand
8. Which enzyme joins Okazaki fragments?
• A) Primase
• B) Helicase
• C) DNA ligase ANSWER
• D) Topoisomerase
9. The site where replication begins is called the:
• A) Telomere
• B) Centromere
• C) Origin of replication ANSWER
• D) Promoter
10. Which nucleotide base is found in RNA but not DNA?
• A) Thymine
• B) Adenine
• C) Uracil ANSWER
• D) Guanine
Gene Expression – Transcription
11. During transcription, which molecule is produced?
• A) DNA
, • B) Protein
• C) mRNA ANSWER
• D) tRNA
12. Which enzyme carries out transcription?
• A) DNA polymerase
• B) RNA polymerase ANSWER
• C) Ligase
• D) Helicase
13. The DNA strand used as a template during transcription is called the:
• A) Coding strand
• B) Sense strand
• C) Template (antisense) strand ANSWER
• D) Leading strand
14. The region of DNA where RNA polymerase binds to initiate transcription is
called the:
• A) Operator
• B) Promoter ANSWER
• C) Enhancer
• D) Terminator
15. In eukaryotes, the primary RNA transcript is called:
• A) mRNA
• B) pre-mRNA (hnRNA) ANSWER
• C) tRNA
• D) rRNA
16. Introns are:
• A) Expressed sequences
• B) Non-coding sequences removed from pre-mRNA ANSWER
• C) Protein-coding regions
• D) Promoter sequences
17. Exons are:
• A) Removed during RNA processing
, • B) Non-coding
• C) Expressed sequences retained in mature mRNA ANSWER
• D) Found only in prokaryotes
18. The 5' cap and poly-A tail are added to mRNA in:
• A) Prokaryotes only
• B) Eukaryotes only ANSWER
• C) Both
• D) Neither
19. The process of removing introns and joining exons is called:
• A) Translation
• B) RNA splicing ANSWER
• C) Replication
• D) Post-translational modification
20. Which of the following is NOT a type of RNA?
• A) mRNA
• B) tRNA
• C) rRNA
• D) dRNA ANSWER
Gene Expression – Translation
21. Translation occurs at which organelle?
• A) Nucleus
• B) Mitochondria
• C) Ribosome ANSWER
• D) Golgi apparatus
22. A codon consists of how many nucleotides?
• A) 1
• B) 2
• C) 3 ANSWER
• D) 4
23. The start codon is:
ANSWERS - LATEST VERSION - TOP RATED (2026/2027)
1. What is the complementary base pair for adenine in DNA?
• A) Guanine
• B) Cytosine
• C) Thymine ANSWER
• D) Uracil
2. DNA replication is described as:
• A) Conservative
• B) Semi-conservative ANSWER
• C) Dispersive
• D) Additive
3. Which enzyme unwinds the DNA double helix during replication?
• A) DNA polymerase
• B) Ligase
• C) Helicase ANSWER
• D) Primase
4. Which enzyme adds nucleotides to the growing DNA strand?
• A) Helicase
• B) DNA polymerase ANSWER
• C) Topoisomerase
• D) RNA polymerase
5. DNA polymerase adds nucleotides in which direction?
• A) 3' to 5'
• B) 5' to 3' ANSWER
• C) Both directions
, • D) Random
6. What is the purpose of a primer in DNA replication?
• A) To unwind DNA
• B) To provide a free 3'-OH for polymerase ANSWER
• C) To join Okazaki fragments
• D) To proofread
7. Okazaki fragments are found on which strand?
• A) Leading strand
• B) Lagging strand ANSWER
• C) Template strand
• D) Coding strand
8. Which enzyme joins Okazaki fragments?
• A) Primase
• B) Helicase
• C) DNA ligase ANSWER
• D) Topoisomerase
9. The site where replication begins is called the:
• A) Telomere
• B) Centromere
• C) Origin of replication ANSWER
• D) Promoter
10. Which nucleotide base is found in RNA but not DNA?
• A) Thymine
• B) Adenine
• C) Uracil ANSWER
• D) Guanine
Gene Expression – Transcription
11. During transcription, which molecule is produced?
• A) DNA
, • B) Protein
• C) mRNA ANSWER
• D) tRNA
12. Which enzyme carries out transcription?
• A) DNA polymerase
• B) RNA polymerase ANSWER
• C) Ligase
• D) Helicase
13. The DNA strand used as a template during transcription is called the:
• A) Coding strand
• B) Sense strand
• C) Template (antisense) strand ANSWER
• D) Leading strand
14. The region of DNA where RNA polymerase binds to initiate transcription is
called the:
• A) Operator
• B) Promoter ANSWER
• C) Enhancer
• D) Terminator
15. In eukaryotes, the primary RNA transcript is called:
• A) mRNA
• B) pre-mRNA (hnRNA) ANSWER
• C) tRNA
• D) rRNA
16. Introns are:
• A) Expressed sequences
• B) Non-coding sequences removed from pre-mRNA ANSWER
• C) Protein-coding regions
• D) Promoter sequences
17. Exons are:
• A) Removed during RNA processing
, • B) Non-coding
• C) Expressed sequences retained in mature mRNA ANSWER
• D) Found only in prokaryotes
18. The 5' cap and poly-A tail are added to mRNA in:
• A) Prokaryotes only
• B) Eukaryotes only ANSWER
• C) Both
• D) Neither
19. The process of removing introns and joining exons is called:
• A) Translation
• B) RNA splicing ANSWER
• C) Replication
• D) Post-translational modification
20. Which of the following is NOT a type of RNA?
• A) mRNA
• B) tRNA
• C) rRNA
• D) dRNA ANSWER
Gene Expression – Translation
21. Translation occurs at which organelle?
• A) Nucleus
• B) Mitochondria
• C) Ribosome ANSWER
• D) Golgi apparatus
22. A codon consists of how many nucleotides?
• A) 1
• B) 2
• C) 3 ANSWER
• D) 4
23. The start codon is:
