DNA to mRNA and DNA to tRNA questions

Ok, I'm not getting this at all! I've been over and over it!

If the DNA triplets were ATG-CGT, the mRNA codons would be _________.

A. AUG-CGU
B. ATG-CGT
C. UAG-GCA
D. UAG-CGU
E. none of these

If the DNA triplets were ATG-CGT, the tRNA anticodons would be _________.

A. AUG-CGU
B. ATG-CGT
C. UAG-GCA
D. UAG-CGU
E. none of these

Is there any easy way to figure this stuff out?

Reply 1

Are you sure that you've typed those out properly? Please check.
Apart from that, the first one should be UAC-GCA
I'm not sure how tRNA codes, so can't tell about that one (it's been a while!)

Reply 2

idiopathic

One DNA strand is complementary to an mRNA, which in turn has to be complementary to the tRNA anticodon. So tRNA anticodon bases must be the same as the DNA bases (except for thymine/uracil change between DNA and RNA), I think.

Reply 3

Steph!

1 UAC GCA

2 AUG GCT

methinks

Reply 4

idiopathic

*steph 247*

1 UAC GCA

2 AUG GCT

methinks

Yeah except 2) AUG GCU

Reply 5

guera88

Do you mean the answer is AUG-CGU?

Reply 6

idiopathic

guera88

Do you mean the answer is AUG-CGU?

For #2, I think so.

Reply 7

Cirsium

For mRNA then do it backwards
Replace A with U, T with A, C with G and G with C

For tRNA it's exactly the same sequence, but Thymine is replaced by Uracil

Reply 8

Natmarjus

the answer to one is none of these (unless u wrote them wrong cos the naswer is UAC GCA)
answer to number 2 is AUG CGU.

Its pretty easy to do! an anti codon is the same as the DNA but thymine is replaced with uracil. mRNA is just the comp base pairings ie G-C, A-U and T-A

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