1. Identify the polypeptide that would be produced as a result of transcribing a
ID: 257139 • Letter: 1
Question
1. Identify the polypeptide that would be produced as a result of transcribing and translating the following DNA sequence from N-terminus to C-terminus. Template DNA: 3' GACTAAGCT 5'
A) Leucine - Isoleucine - Arginine
B) Methionine - Isoleucine - Arginine
C) Stop
D) Serine - Leucine - Valine
E) Arginine - Leucine - Valine
2. The strand of DNA used in Q10 problem undergoes a mutation, such that the first G from the 3' end is changed to a T. The mutant template DNA is: 3' TACTAAGCT 5'. What would change in the polypeptide?
A) No change
B) Polypeptide would be 1 amino acid shorter
C) Polypeptide would be 1 amino acid longer
D) 1 amino acid would substitute for another
E) Translation would terminate within this stretch)
3. The strand of DNA used in Q12 problem undergoes another mutation, this time the first G from the 5' end is changed to an A. The mutant template DNA is: 3' TACTAAACT 5'. What would change in the polypeptide?
A) No change
B) Polypeptide would be 1 amino acid shorter
C) Polypeptide would be 1 amino acid longer
D) 1 amino acid would substitute for another
E) Transcription would terminate within this stretch
)
Explanation / Answer
1- D
2-A
3-A
Note - the changes in mutant type lead to silence mutation where same amino acid coded by the change in base leading to silent mutation
The codon sequence is read from codon table an template is read from5’ to 3’ direction.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.