DNA to mRNA and DNA to tRNA questions Watch

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guera88
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#1
Report Thread starter 13 years ago
#1
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?
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SB
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#2
Report 13 years ago
#2
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!)
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idiopathic
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#3
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#3
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.
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Steph!
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#4
Report 13 years ago
#4
1 UAC GCA

2 AUG GCT

methinks
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idiopathic
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#5
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#5
(Original post by *steph 247*)
1 UAC GCA

2 AUG GCT

methinks
Yeah except 2) AUG GCU
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guera88
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#6
Report Thread starter 13 years ago
#6
Do you mean the answer is AUG-CGU?
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idiopathic
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#7
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#7
(Original post by guera88)
Do you mean the answer is AUG-CGU?
For #2, I think so.
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Cirsium
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#8
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#8
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
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Natmarjus
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#9
Report 13 years ago
#9
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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