BIOMOLECULES AND ENZYMES

BIOLOGY

STRUCTURE OF PROTEINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Transcribe the following DNA strand:CTG AAT
A
GAC TTA
B
CTG AAT
C
GAC UUA
D
CUG AAU
Explanation: 

Detailed explanation-1: -DNA is double-stranded, but only one strand serves as a template for transcription at any given time. This template strand is called the noncoding strand.

Detailed explanation-2: -It involves copying a gene’s DNA sequence to make an RNA molecule. Transcription is performed by enzymes called RNA polymerases, which link nucleotides to form an RNA strand (using a DNA strand as a template). Transcription has three stages: initiation, elongation, and termination.

Detailed explanation-3: -When a DNA strand with the sequence AACGTAACG is transcribed, the resultant sequence of the mRNA molecule synthesized is UUGCAUUGC. This is based on the paring of nitrogenous bases-adenine pairs with thymine (in DNA) and uracil (in RNA) and guanine with cytosine.

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