ATG GCG TAT GAC CTA
1. How is this segment of DNA transcribed into messenger RNA (mRNA)?
2. what is the nucleotide sequence of the mRNA that corresponds to this gene segment?
2007-01-19 08:35:21 · 5 answers · asked by jessica_stay 1 in Science & Mathematics ➔ Biology
3. How is the nucleotide sequence in the mRNA translated into a polypeptide sequence?
2007-01-19 08:38:28 · update #1
For the first part you just need to read your textbook about transcription.
BE VERY CAREFUL
DNA is a double helix. One strand will code for the protein and the other is used as a template for the polymerase to use in order to make the mRNA.
BY CONVENTION, the gene sequence is the CODING sequence and NOT the sequence of the template.
They give you the GENE sequence.
Thus the sequence of them RNA is going to be the same with U instead of T.
AUG GCG UAU GAC CUA
The protein sequence will be
MAYDL in single letter code or
Met-Ala-Tyr-Asp-Leu in three letter code.
You can use http://au.expasy.org/tools/dna.html
to translate any sequence
2007-01-21 08:45:43 · answer #1 · answered by bellerophon 6 · 0⤊ 0⤋
3. How is the nucleotide sequence in the mRNA translated into a polypeptide sequence?
1. Through the process of transcription. First the RNA polymerase spilt apart a part of the DNA and makes a complemetary strand. It then leaves the nucleus and attachsed to the ribosome. Then the DNA strands are put back together.
2. UAC UGU AUA CUG GAU
3. In translation. The messenger RNA is now attached to the ribosome. Then the transfer RNA codons are floting around in the air. attached to each tRNA is a amino acid. The amino acids all like up for each set of three(codon; messenger RNA = UAC tRNA = AUG.) and then all the amino acids make up a protien or polypeptide chain.
How do you know which kind of amino acid is attached to each tRNA? There are 64 types of amino acids. There is actually a chart (http://www.tea.state.tx.us/student.assessment/resources/online/2003/grade10/science/p122no26.gif) which shows you which amino acid is attached to each set of three!
ENJOY!!
2007-01-19 09:32:03 · answer #2 · answered by ›tªmmy‹ 3 · 0⤊ 0⤋
1. mRNA nucleotides are brought to the "unzipped" DNA bases, matching A-U and C-G. A T(thymine) on DNA matches A on mRNA Then mRNA separates to move out of the nucleus to a ribosome. The gene "zips" back together.
2. Just match the pairs as above.
3. tRNA has anticodons that match the mRNA codons, again A-U, C-G. Each tRNA brings a specific amino acid to the growing protein chain.
2007-01-19 08:54:18 · answer #3 · answered by ecolink 7 · 0⤊ 0⤋
you could translate this into mRNA UAC-CGC-AUA-CUG-GAU Now you could look a your amino acid chart to record the amino acids for each mRNA. Sorry, i don't have a chart with me, yet i are conscious of it may be on your e book.
2016-10-31 13:34:13 · answer #4 · answered by ? 4 · 0⤊ 0⤋
1. UAC CGC AUA CUG GAU
2.Tyr Arg Ile Leu Asp
Hope it can help you:D
2007-01-19 09:04:43 · answer #5 · answered by battousai 1 · 0⤊ 0⤋