BIOLOGY
STRUCTURE OF NUCLEIC ACIDS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the sense strand of DNA is used as a template to make mRNA
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the antisense strand of DNA is used as a template to make mRNA
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the code in mRNA is read to make a polypeptide
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several ribosomes attach to DNA to make mRNA and then polypeptides
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Detailed explanation-1: -The antisense strand then becomes a template for making messenger RNA, and the resulting messenger RNA is then a sense messenger RNA that, essentially, matches the sense DNA strand. The messenger RNA is then involved in coding for the corresponding protein.
Detailed explanation-2: -During transcription, the DNA of a gene serves as a template for complementary base-pairing, and an enzyme called RNA polymerase II catalyzes the formation of a pre-mRNA molecule, which is then processed to form mature mRNA (Figure 1).
Detailed explanation-3: -In transcription, a portion of the double-stranded DNA template gives rise to a single-stranded RNA molecule. In some cases, the RNA molecule itself is a “finished product” that serves some important function within the cell.
Detailed explanation-4: -The DNA strand that serves as a template for mRNA synthesis is called as anticoding strand or antisense strand or noncoding strand. The other strand is called coding strand or sense strand as its base sequence is same as that of newly synthesized mRNA.
Detailed explanation-5: -During transcription, DNA is used as a template to make a molecule of messenger RNA (mRNA). The molecule of mRNA then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. During translation, the genetic code in mRNA is read and used to make a protein.