Question

Use the following figure for Questions 2-3. DNA and DNA template strand I 2. The sequence of the mRNA that would result from transcribing the gene pictured would be A. AUGCGAUUA B. AUUAGCGUA C. UACGCUAAU D. UAAUCGCAU E. ATGCGATTA 3. The sequence of the peptide that would result from transcribing and translating the gene pictured would be A. Tyr-Ala-aso B. Ile-Ser-Val. C. no peptide would be made, the first codon means "stop." D. Met-are-Leu. E. Tyr-Ser-Val.

Answer 1

2) The nucleotide that are present in the coding strand have the same base except there is no uracil and in place is thymine.TACGCTAAT are the nucleotides present in the template strand of the DNA then the mRNA transcribed from the DNA molecule would have base pairing like A with U and G with C .There is no thymine in mRNA so the mRNA transcribed from DNA is AUGCGAUUA. So the right answer is option 1)AUGCGAUUA.

3)The mRNA is then translated into protein with the assistance of the tRNA, mRNA and the ribosomes. The tRNA has an anticodon loop and there is pairing between the tRNA anticodon and the mRNA codon. There are three codons which code for a particular amino acid. The stop codon are used for chain termination and there are three termination codon UAA,UAG, UGA.

AUG codes for methionine and similarly CGA codes for argenine and UUA codes for leucine so the right answer for the following is D)Met-Arg-Leu.

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