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Mig.Dela7 Mig.Dela7
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11 years ago
What is the correct mRNA sequence for the following strand of DNA?:

TACGGTCGACCCTTA

If  A pairs with U and C with G in mRNA, then what do you do with the T?

mRNA:
A-U
C-G
T-?
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wrote...
#1
11 years ago
In mRNA there is no T... that becomes U

the correct sequence would be
AUGCCAGCUGGGAAU
wrote...
#2
11 years ago
T goes with A

so the sequence would be :

AUGCCAGCUGGGAAU
wrote...
#3
11 years ago
A

You have to imagine that U has just directly swapped with T.  So incoming A still bonds to T, but there are no incoming T to bond with A.
wrote...
#4
11 years ago
In mRNA, all of the bases remain the same as with DNA, except every T becomes a U.  Therefore, if the DNA is TACGGTCGACCCTTA you will pair every base with its corresponding pair EXCEPT when the pair should be a T it will now be a U.  The mRNA would be:

AUGCCAGCUGGGAAU

so just to review the pairs are:

A-T-->A-U
G-C
wrote...
#5
11 years ago
3' TACGGTCGACCCTTA 5'
5' AUGCCAGCUGGGAAU 3'

Also remember that there is no thymine in RNA, rather it has uracil as its pyrimidine base.
wrote...
#6
11 years ago
there is no T, the uracil replaces thymine in rna
then when it goes back to dna, the uracil is replaced by thymine again
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