BIOMOLECULES AND ENZYMES

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BIOLOGY

PROTEINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In step 3 of transcription, RNA polymerase ____ and then links complementary RNA nucluotides and ____ the gene.
A
deletes, copies
B
deletes, reads
C
adds, copies
D
adds, reads
Explanation: 

Detailed explanation-1: -During elongation, RNA polymerase “walks” along one strand of DNA, known as the template strand, in the 3’ to 5’ direction. For each nucleotide in the template, RNA polymerase adds a matching (complementary) RNA nucleotide to the 3’ end of the RNA strand.

Detailed explanation-2: -Step 3: Termination Termination is the ending of transcription, and occurs when RNA polymerase crosses a stop (termination) sequence in the gene. The mRNA strand is complete, and it detaches from DNA.

Detailed explanation-3: -Transcription begins when an enzyme called RNA polymerase attaches to the DNA template strand and begins assembling a new chain of nucleotides to produce a complementary RNA strand.

Detailed explanation-4: -anticodon – a sequence of three nucleotides on a tRNA molecule that bond to a complementary sequence on an mRNA molecule.

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