It's not a strand that is replaced, but a nitrogen base, much like adenine. The pyrimidine thymine is replaced by another pyrimidine uracil.
Uracil pairs with adenine in mRNA and replaces thymine in the DNA strand during transcription.
No. Messenger RNA forms a complementary strand in which each DNA base is paired with its complementary base in mRNA. For example, if the DNA sequence is AGCTTG, the mRNA sequence will be UCGAAC. Notice that U for uracil in RNA pairs with adenine in DNA. This is because uracil takes the place of thymine in RNA.
It will use adenine, but thymine will be replaced by a nitrogen base called "uracil" in mRNA
Yes, the mRNA strand complementary to the DNA sequence AATTGC would be UUAACG. This is due to the selective base pairing rules between adenine (A) and uracil (U), thymine (T) and adenine (A), guanine (G) and cytosine (C).
In transcription, the mRNA strand is formed by complementary base pairing of the template DNA strand. However we should note that the nitrogenous bases in mRNA are Adenine, Guanine, Cytosine and Uracil, while those in DNA are Adenine, Guanine, Cytosine and Thymine.So the mRNA strand would be formed by matching the A in DNA with U in mRNA, T in DNA with A in mRNA, C in DNA with G in mRNA and G in DNA with C in mRNA.I hope that helps!
TGCA
The corresponding mRNA strand would be AUCG.
gac uau Gac uau GAC UAU
First of all, it is codons,not condons. MRNA would have uug auc cca. If I am not incorrect, you only use the term codons for MRNA, not in the actual DNA strand. The Anticodons would then be in the TRNA, which codes for the Amino Acids needed by the cells.
DNA is not made into mRNA, it is transcribed by mRNA. The DNA molecule is split into two strands by the enzyme helicase. One strand is the sense strand and the other is the anti-sense strand. Then mRNA nucleotides pair with their complimentary DNA bases on the antisense strand. The enzyme RNA polymerase causes the mRNA nucleotides to bond with one another, forming a strand of mRNA.
Adenine only binds with Thymine, and Guanine only binds to Cytosine in DNA. In RNA however,Thymine is replaced with Uracil which binds to Adenine.
The mRNA sequence generated from the DNA strand tgacgca would be acugcgu. This is because mRNA is complementary to the DNA template strand, so DNA base T pairs with mRNA base A, DNA base G pairs with mRNA base C, DNA base A pairs with mRNA base U, and DNA base C pairs with mRNA base G.