Q. During transcription, which strand of DNA serves as the template?
-
A.
Coding strand
-
B.
Non-coding strand
-
C.
Both strands
-
D.
Neither strand
Solution
The non-coding strand of DNA serves as the template for RNA synthesis during transcription.
Correct Answer:
B
— Non-coding strand
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Q. What is the function of transcription factors?
-
A.
To degrade RNA
-
B.
To assist RNA polymerase
-
C.
To splice RNA
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D.
To replicate DNA
Solution
Transcription factors are proteins that help RNA polymerase bind to the promoter and initiate transcription.
Correct Answer:
B
— To assist RNA polymerase
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Q. What is the result of transcription?
-
A.
DNA replication
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B.
Protein synthesis
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C.
RNA synthesis
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D.
Cell division
Solution
The result of transcription is the synthesis of RNA from a DNA template.
Correct Answer:
C
— RNA synthesis
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Q. What is the role of the promoter in transcription?
-
A.
To terminate transcription
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B.
To enhance RNA stability
-
C.
To initiate transcription
-
D.
To splice RNA
Solution
The promoter is a DNA sequence that signals the start of transcription and is recognized by RNA polymerase.
Correct Answer:
C
— To initiate transcription
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Q. What modification occurs to eukaryotic mRNA before it is translated?
-
A.
Addition of a poly-A tail
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B.
Removal of exons
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C.
Addition of a 5' phosphate
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D.
Conversion to tRNA
Solution
Eukaryotic mRNA undergoes several modifications, including the addition of a poly-A tail at the 3' end.
Correct Answer:
A
— Addition of a poly-A tail
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Q. Which of the following is a key difference between prokaryotic and eukaryotic transcription?
-
A.
Prokaryotes have introns
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B.
Eukaryotes require a primer
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C.
Prokaryotic transcription occurs in the cytoplasm
-
D.
Eukaryotic transcription is faster
Solution
In prokaryotes, transcription occurs in the cytoplasm, while in eukaryotes it occurs in the nucleus.
Correct Answer:
C
— Prokaryotic transcription occurs in the cytoplasm
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Q. Which of the following is NOT a step in the transcription process?
-
A.
Initiation
-
B.
Elongation
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C.
Termination
-
D.
Replication
Solution
Replication is not a step in transcription; it refers to the process of copying DNA.
Correct Answer:
D
— Replication
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Q. Which RNA molecule carries the genetic information from DNA to the ribosome?
-
A.
tRNA
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B.
rRNA
-
C.
mRNA
-
D.
snRNA
Solution
mRNA (messenger RNA) carries the genetic information from DNA to the ribosome for protein synthesis.
Correct Answer:
C
— mRNA
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