Thymine is the complementary base for adenine during DNA transcription. During RNA transcription, however, uracil is the complementary base for adenine.
The complementary base for cytosine is guanine. Adenine bonds with thymine as cytosine bonds with guanine in DNA but in RNA thymine is replaced with Uracil.
During transcription, the resulting bases on the mRNA if the DNA has the base adenine is Proteins.
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A stands for adenine, one of the four nitrogen-containing bases in DNA. By the rules of complementary base pairing, A always pairs with T (thymine). Adenine is a purine (a base with a double ring structure). T is a pyrimidine (a base with a single ring structure). Each pair of bases always consists of a purine and a pyrimidine. A and T form two hydrogen bonds between them; G and C form three. For more information see: http://www.phschool.com/science/biology_place/biocoach/dnarep/helix.html and http://www.phschool.com/science/biology_place/biocoach/dnarep/chembase.html
Transcription produces a strand of messenger RNA that is complementary to the DNA that it transcribed. For example, the DNA sequence AGTCGA would be transcribed by messenger RNA as UCAGCU.
Basically, RNA polymerase's role is very similar to that of DNA polymerase. RNA polymerase is an enzyme that is used during transcription in the nucleus. Similar to DNA polymerase, RNA polymerase codes for the complementary nucleotides to a DNA strand. Instead of thymine though, uracil codes with adenine. This coded mRNA strand then travels from the nucleus to the ribsome where translation occurs - the result is protein made from an amino acid chain. To answer your main question - RNA polyermase adds the complementary nucleotides to the DNA strand using uracil instead of thymine. hope that helps :)
During transcription, the resulting bases on the mRNA if the DNA has the base adenine is Proteins.
RNA polymerase is the enzyme that adds and links complementary RNA nucleotides during transcription
RNA molecules produced by transcription are much shorter in length than DNA molecules produced by replication. Also in DNA replication the compliment of Adenine is Thymine. In transcription the compliment of Adenine is Uracil.
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Transcription.
DNA: Adenine - Thymine Guanine - Cytosine RNA (URACIL REPLACES THYMINE!): Adenine - Uracil Guanine - Cytosine
During transcription an RNA Molecule is formed inside the nucleus. The DNA is too large to leave the nucleus and participates directly in the cytoplasmic protein synthesis. It is necessary to make a small copy of Messenger RNA that will migrate out of the nuclear pore in to the cytoplasm.
since rna is single stranded........it only needs one complementary strand......!
Adenine pairs with Uracil and Guanine pairs with Cytosine Cytosine pairs with Guanine. There is no thymine in RNA
A's with T's, G's with C's in DNA. A's with U's, G's with C's in RNA. In transcription an RNA copy of the DNA is being made. So uracil pairs with adenine.
A stands for adenine, one of the four nitrogen-containing bases in DNA. By the rules of complementary base pairing, A always pairs with T (thymine). Adenine is a purine (a base with a double ring structure). T is a pyrimidine (a base with a single ring structure). Each pair of bases always consists of a purine and a pyrimidine. A and T form two hydrogen bonds between them; G and C form three. For more information see: http://www.phschool.com/science/biology_place/biocoach/dnarep/helix.html and http://www.phschool.com/science/biology_place/biocoach/dnarep/chembase.html
copying part of the nucleotide sequence of DNA into a complementary sequence in RNA is called TRANSCRIPTION