BIOMOLECULES AND ENZYMES

BIOLOGY

NUCLEIC ACIDS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

During transcription if the coding strand contains the following sequence:5’-ATGCCCTACGCACTG-3’What should be the sequence on the mRNA?

A	5’-TACGGGATGCGTGAC-3’
B	3’-AUGCCCUACGCACUG-5’
C	5’-UACGGGUACGCACUG-3’
D	5’-AUGCCCUACGCACUG-3’

Explanation:

Detailed explanation-1: -Answer and Explanation: The codon in mRNA that corresponds to the sequence 5’-AGT-3’ in the DNA template is 3’-UCA-5’ which also can be written as 5’-ACU-3’.

Detailed explanation-2: -The sequence of coding strand of DNA in a transcription unit is 5′−GGAATTCCG−3′.

Detailed explanation-3: -All mRNAs are read in the 5´ to 3´ direction, and polypeptide chains are synthesized from the amino to the carboxy terminus. Each amino acid is specified by three bases (a codon) in the mRNA, according to a nearly universal genetic code.

Detailed explanation-4: -The coding strand is directed in the 3’ to 5’ direction. The template strand is directed in the 5’ to 3’ direction. The coding strand has a complementary nucleotide sequence.

There is 1 question to complete.