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A DNA template is composed of the following nucleotide sequence: 5'-TACGCATT-3' What is the mRNA transcript for this template?

A. 5'-TTACGCAT-3'
B. 5'-AAUGCGUA-3'
C. 5'-UACGCAUU-3'
D. 5'-AATGCGTA-3'
E. 5'-AUGCGUAA-3'

Respuesta :

Answer:

E. 5'-AUGCGUAA-3'

Explanation:

The nucleotide sequence of the template strand specifies the nucleotide sequence of mRNA. Adenine in template strand pairs with uracil base in mRNA, thymine with adenine, guanine with cytosine and cytosine with guanine base. Also, the polarity of the DNA template strand and that of the mRNA is anti-parallel which means that 3' end of the template strand is present opposite to the 5' end of the mRNA. Therefore, a DNA template strand with nucleotide sequence 5'-TACGCATT-3'  would code for the following mRNA:

DNA template strand: 5'-TACGCATT-3'  

mRNA strand:               3'-AUGCGUAA-5'

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