Here Are 50 Multiple-Choice Questions (Mcqs) On The
MOLECULAR BASIS OF INHERITANCE
Based On The Indian Syllabus
**1. What is the primary function of DNA polymerase during DNA replication?**
A) Unwinding the DNA strands
B) Synthesizing new DNA strands
C) Initiating DNA replication
D) Repairing damaged DNA
**Answer: B) Synthesizing new DNA strands**
**2. Which enzyme is responsible for unwinding the DNA double helix during
replication?**
A) DNA polymerase
B) DNA ligase
C) Helicase
D) RNA polymerase
**Answer: C) Helicase**
**3. In DNA, adenine (A) always pairs with which base?**
A) Thymine (T)
B) Guanine (G)
,C) Cytosine (C)
D) Uracil (U)
**Answer: A) Thymine (T)**
**4. Which of the following represents the correct base pairing in RNA?**
A) A-U, G-T, C-G
B) A-T, G-C, C-G
C) A-U, G-C, C-G
D) A-T, G-T, C-G
**Answer: C) A-U, G-C, C-G**
**5. What is the role of tRNA in protein synthesis?**
A) Transcription
B) Translation
C) Replication
D) Mutation
**Answer: B) Translation**
**6. The genetic code is degenerate. What does this mean?**
A) Each amino acid has only one codon.
B) Each codon specifies multiple amino acids.
C) Some codons do not code for amino acids.
, D) Some amino acids have no codons.
**Answer: B) Each codon specifies multiple amino acids.**
**7. Which enzyme is responsible for adding new nucleotides during
transcription?**
A) DNA polymerase
B) RNA polymerase
C) Helicase
D) Ligase
**Answer: B) RNA polymerase**
**8. Which of the following is involved in post-transcriptional modification of
mRNA?**
A) Spliceosome
B) Ribosome
C) RNA polymerase
D) Helicase
**Answer: A) Spliceosome**
**9. What is the function of the start codon in protein synthesis?**
A) Terminate translation
B) Initiate translation
MOLECULAR BASIS OF INHERITANCE
Based On The Indian Syllabus
**1. What is the primary function of DNA polymerase during DNA replication?**
A) Unwinding the DNA strands
B) Synthesizing new DNA strands
C) Initiating DNA replication
D) Repairing damaged DNA
**Answer: B) Synthesizing new DNA strands**
**2. Which enzyme is responsible for unwinding the DNA double helix during
replication?**
A) DNA polymerase
B) DNA ligase
C) Helicase
D) RNA polymerase
**Answer: C) Helicase**
**3. In DNA, adenine (A) always pairs with which base?**
A) Thymine (T)
B) Guanine (G)
,C) Cytosine (C)
D) Uracil (U)
**Answer: A) Thymine (T)**
**4. Which of the following represents the correct base pairing in RNA?**
A) A-U, G-T, C-G
B) A-T, G-C, C-G
C) A-U, G-C, C-G
D) A-T, G-T, C-G
**Answer: C) A-U, G-C, C-G**
**5. What is the role of tRNA in protein synthesis?**
A) Transcription
B) Translation
C) Replication
D) Mutation
**Answer: B) Translation**
**6. The genetic code is degenerate. What does this mean?**
A) Each amino acid has only one codon.
B) Each codon specifies multiple amino acids.
C) Some codons do not code for amino acids.
, D) Some amino acids have no codons.
**Answer: B) Each codon specifies multiple amino acids.**
**7. Which enzyme is responsible for adding new nucleotides during
transcription?**
A) DNA polymerase
B) RNA polymerase
C) Helicase
D) Ligase
**Answer: B) RNA polymerase**
**8. Which of the following is involved in post-transcriptional modification of
mRNA?**
A) Spliceosome
B) Ribosome
C) RNA polymerase
D) Helicase
**Answer: A) Spliceosome**
**9. What is the function of the start codon in protein synthesis?**
A) Terminate translation
B) Initiate translation
