1. How many amino acids are there? 2. How many mRNA codons are there? 3. List th
ID: 197143 • Letter: 1
Question
1. How many amino acids are there?
2. How many mRNA codons are there?
3. List the codon sequences for the three stop codons.
4. Transcribe and translate the following DNA sequence into a polypeptide chain (string of amino acids). You must show the mRNA sequence and amino acid sequence for full credit. Assume the reading frame startes with the first three nucleotides. Remember two things: 1) Thymine is replaced by Uracil in RNA molecules, and 2) transcription from DNA to mRNA is done from the antisense strand of the DNA.
CTA GTG TGC AGC AGA GGT
5. List the eight amino acids which have silent third positions for their respective codons.That is to say, which eight amino acids are translated independant of a codon's third position nucleotide because either of the four nucleotides can be in that position.
6. What two amino acids have only one codon sequence each?
7. What two amino acids have the most codon sequences?
8. The following DNA sequence is part of the gene that codes for the protein that causes the presence of dimples. Decode the DNA message into mRNA and finally amino acids. Use the genetic code to assist in this task. When you have finished, determine the phenotype of the person the DNA came from.
CGA GTC GCA TAA
9. If arginine is the 3rd amino acid in the protein sequence, the person will have dimples. Does the person have dimples?
Second Letter First Letter Third Leter cysteine cysteine stop tryptophan arginine arginine arginine arginine serine serine arginine arginine glycine glycine glycine glycine phenylalanine serine uphenylalanineserine tyrosine tyrosine stop stop histidine histidine glutamine glutamine asparagine asparagine lysine ysine aspartate aspartate glutamate glutamate leucine eucine leucine senne serine proline proline proline proline threonine threonine threonine threonine alanine alanine alanine alanine c leucine leucine leucine isoleucine Aisoleucine isoleucine (start) methionine valine G valine valine valineExplanation / Answer
AS PER CHEGG POLICY, PROCEEDING TO ANSWER ONLY THE FIRST 4 QUESTIONS/SUBPARTS, THAT IS, QUESTIONS 1 TO 4:
Answer 1: How many amino acids are there: 20
Answer 2: How many mRNA codons are there: 4*4*4 = 64
Answer 3: List the codon sequences for the three stop codons: UAA, UGA, & UAG
Answer 4:
DNA: CTA GTG TGC AGC AGA GGT
mRNA: CUA GUG UGC AGC AGA GGU
Protein: Leucine - Valine - Cysteine - Serine - Arginine - Glycine
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.