Admin Table of Contents
- 1 What is the initiator triplet in eukaryotes?
- 2 What is a triplet in genes?
- 3 What is the initiator triplet start codon in both prokaryotes and eukaryotes which amino acid does this triplet code for?
- 4 What is the name given to the three bases in a mRNA that bind to the anticodon of tRNA to specify an amino acid placement in a protein?
- 5 What is the role of initiator codons?
- 6 What would be the DNA base triplets on the DNA template strand that complement the mRNA?
- 7 Why must the genetic code be written in triplets of nucleotides?
What is the initiator triplet in eukaryotes?
UAA, UGA, and UAG are initiator codons, not termination codons.
What is a triplet in genes?
A triplet code could make a genetic code for 64 different combinations (4 X 4 X 4) genetic code and provide plenty of information in the DNA molecule to specify the placement of all 20 amino acids. These three letter codes of nucleotides (AUG, AAA, etc.) are called codons.
What is the start codon and what amino acid is recruited by this triplet?
The start codon (AUG) codes for the amino acid methionine. The start codon is the nucleotide triplet on the mRNA strand that signals the start of the codons to be translated. Each codon triplet binds to a complementary anticodon triplet on a tRNA molecule that carries a corresponding amino acid.
What is the initiator triplet start codon in both prokaryotes and eukaryotes which amino acid does this triplet code for?
START codons AUG is the most common START codon and it codes for the amino acid methionine (Met) in eukaryotes and formyl methionine (fMet) in prokaryotes. During protein synthesis, the tRNA recognizes the START codon AUG with the help of some initiation factors and starts translation of mRNA.
What is the name given to the three bases in a mRNA that bind to the anticodon of tRNA to specify an amino acid placement in a protein?
codon
This order is determined by the attraction between a codon, a sequence of three nucleotides on the mRNA, and a complementary nucleotide triplet on the tRNA, called an anticodon. This anticodon also specifies the particular amino acid that the tRNA carries.
How are triplets and genes related?
evolution: Gene mutations three nucleotides—called a triplet or codon—codes for one particular amino acid in the protein.
What is the role of initiator codons?
The start codon sets the reading frame: instead of continuing to move down the mRNA transcript one base at a time, the ribosome now reads the mRNA codons consecutively, three bases at a time (Fig. 3.18). The sequence of the triplet codon determines which amino acid is added next to the growing protein.
What would be the DNA base triplets on the DNA template strand that complement the mRNA?
Information for the genetic code is stored in a sequence of three nucleotide bases of DNA called base triplets, which act as a template for which messenger RNA (mRNA) is transcribed. A sequence of three successive nucleotide bases in the transcript mRNA is called a codon.
Which of the following is the initiator codon quizlet?
Consecutive 3-base or triplet sequence. AUG-dual functions–specifies the amino acid methionine (met) and is the initiator codon for translation because met is the first amino acid added to all proteins. UAG, UAA, and UGA are stop codons, and do not specify an amino acid.
Why must the genetic code be written in triplets of nucleotides?
Why must the genetic code be written in triplets of nucleotides? The codes are used in the manufacture of amino acids. If it were single or double codes, then it would not be possible to make the 20 amino acids needed by the body.