During translation, the genetic code is used to convert a sequence of nitrogenous bases in mRNA to an amino acid sequence. Which of the following is true of the genetic code?I. More than one codon sequence codes for a single amino acidII. The most 5' position of the codon on mRNA is the wobble positionIII. Each codon sequence only codes for one amino acid
Question
During translation, the genetic code is used to convert a sequence of nitrogenous bases in mRNA to an amino acid sequence. Which of the following is true of the genetic code?I. More than one codon sequence codes for a single amino acidII. The most 5' position of the codon on mRNA is the wobble positionIII. Each codon sequence only codes for one amino acid
Solution
The following statements are true about the genetic code:
I. More than one codon sequence codes for a single amino acid: This is true. The genetic code is degenerate, meaning that more than one codon can specify the same amino acid. For example, the amino acid leucine can be coded by six different codons.
III. Each codon sequence only codes for one amino acid: This is also true. While more than one codon can code for the same amino acid, each individual codon only codes for one specific amino acid. For example, the codon UUU will always code for the amino acid phenylalanine.
However, the statement II. The most 5' position of the codon on mRNA is the wobble position: This is not true. The wobble position is actually the third (3') position of the codon. This position is less constrained than the others, allowing variations that still code for the same amino acid. This is another aspect of the degeneracy of the genetic code.
Similar Questions
The genetic code: A) Is composed of 64 codons, of which three are STOP codons B) Is composed of 64 codons that code for amino acids C) Is composed of 64 codons, each coding for a different amino acid D) Is different from one organism to another E) Consists of DNA in eukaryotes, while in viruses it consists of RNA
For each statement, indicate whether it is true or false. The information contained in rRNA, called the genetic code, is carried in sets of three-nucleotide units called codons.A codon specifies an amino acid during translation. There are 64 possible codons that exist; therefore, amino acids can have more than one codon. There are 3 start codons and one stop codon within the genetic code.
Which of the following statements is true for the genetic code?The number of various amino acid types is higher than the number of various tRNA anticodons in a given cell type.One codon can determine various types of amino acids in the same cell.One amino acid type can be determined by various codon types in the same cell.The genetic code is universal and 100% identical, including also the coding of mitochondria.The operon model proves the overlapping nature of genetic coding.
Question 11In the genetic code, mRNA is decoded in blocks of three bases, known as codons. Each codon specifies a particular amino acid. Proteins are built one amino acid at a time, with order determined by the order of the codons in the mRNA. There are 64 possible codons in this genetic code, but there are only 20 amino acids. What do the extra codons allow for?
n the genetic code, there are:Select one:a. The same number of codons and amino acidsb. More tRNAs than codonsc. More nucleotides than codonsd. More codons than amino acids
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