Table of Contents
- 1 How many nucleotides are in 146 amino acids?
- 2 How many different amino acid sequences are possible in a polypeptide 146 amino acids long?
- 3 How many tRNA are there for each amino acid?
- 4 What the maximal number of the tRNA molecules that is needed for synthesis a protein composed of 20 different amino acid?
- 5 What the maximal number of the TRNA molecules that is needed for synthesis a protein composed of 20 different amino acid?
- 6 How many of the twenty amino acids are represented by just one of the sixty four codons in the genetic code?
- 7 How many different types of tRNA are needed for the synthesis of this polypeptide?
- 8 How many different kinds of tRNA molecules must be used to construct this polypeptide?
- 9 How many possible combinations of amino acids are there in tRNA?
- 10 What is the function of ATP in tRNA?
How many nucleotides are in 146 amino acids?
How many mRNA nucleotides are required to encode this polypeptide? Note: (146*3)=438 because 3 nucleotides make up 1 codon, which codes for the amino acid.
How many different amino acid sequences are possible in a polypeptide 146 amino acids long?
(c) How many different amino acid sequences are possible in a polypeptide 146 amino acids long? (a) “multiple codons that code for the same amino acid” 4^3 =64 possible combinations.
How many tRNA are there for each amino acid?
one tRNA
Specialized tRNAs exist for each of the 20 amino acids needed for protein synthesis, and in many cases more than one tRNA for each amino acid is present. The 61 codons used to code amino acids can be read by many fewer than 61 distinct tRNAs.
How many tRNA molecules would be required to translate this gene to a protein?
31 tRNAs
At least 31 tRNAs are required to translate, unambiguously, all 61 sense codons.
What are the roles and relationships between tRNA synthetases and tRNA molecules?
tRNAs are the adaptor molecules that convert the sequence of codons in mRNAs into the sequence of amino acids in polypeptides. tRNA synthetases are enzymes that “charge tRNAs” by catalyzing the covalent attachment of an amino acid to the 3′ end of the tRNA.
What the maximal number of the tRNA molecules that is needed for synthesis a protein composed of 20 different amino acid?
The following “wobble” rules mean that the 61 codons (for 20 amino acids) can be read by as few as 31 anticodons (or 31 tRNAs).
What the maximal number of the TRNA molecules that is needed for synthesis a protein composed of 20 different amino acid?
How many of the twenty amino acids are represented by just one of the sixty four codons in the genetic code?
Of these 64 codons, 61 represent amino acids, and the remaining three represent stop signals, which trigger the end of protein synthesis. Because there are only 20 different amino acids but 64 possible codons, most amino acids are indicated by more than one codon.
How many types of tRNA molecules are there?
There are thought to be 31 different tRNAs, but these 20 synthetases are capable of “charging” all of them with the correct amino acid.
How many tRNA synthetases are there?
The 20 different types of aa-tRNA are made by the 20 different aminoacyl-tRNA synthetases (aaRSs, of which there are two classes), one for each amino acid of the genetic code (Ibba and Söll 2000).
How many different types of tRNA are needed for the synthesis of this polypeptide?
Since there are 14 different amino acids, 14 different types of tRNA are needed for the synthesis of the given polypeptide.
How many different kinds of tRNA molecules must be used to construct this polypeptide?
This assignment is accomplished by twenty different enzymes called aminoacyl-tRNA synthetases (aaRS) for the twenty amino acids that are incorporated into proteins. There are thought to be 31 different tRNAs, but these 20 synthetases are capable of “charging” all of them with the correct amino acid.
How many possible combinations of amino acids are there in tRNA?
In the genetic code, codons made of of three bases specify an amino acid. With three bases, there are 64 possible permutations. With three codons corresponding to STOP codons, this leaves 61 combinations that code for an amino acid. This would require 61 distinct tRNA species were it not for the “wobble base”.
How many types of tRNA are there in the genetic code?
There are 64 codons in the genetic code and there are only 45 distinct types of tRNA. These 45 types of tRNA are enough to translate all 64 co…
What is the function of aminoacyl-tRNA synthetase?
An enzyme called aminoacyl-tRNA synthetase (there are 20 different types of them, one for each proteinogenic amino acid) binds to the specific amino acid and the specific tRNA with the corresponding anticodon, and attaches the amino acid to the 3′-CCA stem of the tRNA molecule.
What is the function of ATP in tRNA?
ATP provides chemical energy needed for the charging of tRNAs with amino acids 14C-labelled leucine modified amino acid used to monitor incorporation of amino acids into tRNA molecules are polypeptides primary structure linear base sequence in tRNA secondary structure base pairing to form stem loop structures in tRNA tertiary structure