BIOLOGY
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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CATCTAGAG-CTUGUTUCTC
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GCTAATCGAT-CGAUUAGCUA
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CTGACTGACC-GACUGACUGG
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AGCTCCGATC-UCGAGGCUAG
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GGATCTCTCA-CCTAGAGAGT
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Detailed explanation-1: -The enzyme that converts DNA into mRNA is called RNA polymerase, which attaches to the DNA double helix as shown here. Once attached, RNA polymerase can unwind the helix and begin copying one of the DNA strands to form an mRNA transcript of the gene.
Detailed explanation-2: -Transcription of a gene takes place in three stages: initiation, elongation, and termination.
Detailed explanation-3: -The major steps of transcription are initiation, promoter clearance, elongation, and termination.
Detailed explanation-4: -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.