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
Question
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
Solution
The correct answer is:
d. More codons than amino acids
Here's why:
The genetic code is a set of rules used by living cells to translate information encoded within genetic material into proteins. A codon is a sequence of three DNA or RNA nucleotides that corresponds with a specific amino acid or stop signal during protein synthesis.
There are 64 possible codons (4 nucleotides possible at each of the 3 positions, so 4^3 = 64) and only 20 common amino acids. Therefore, there are more codons than amino acids.
The other options are incorrect because:
a. There are not the same number of codons and amino acids. As mentioned, there are 64 codons and 20 common amino acids.
b. There are not more tRNAs than codons. Each tRNA molecule is specific for one amino acid and one or more codons.
c. There are more nucleotides than codons, but this option is not correct in the context of the question. The question is comparing codons and amino acids, not nucleotides and codons.
Similar Questions
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.
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.
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
The genetic code is said to be __________ because more than one codon will specify a particular amino acid. A. multiplicative B. degenerate C. repetitious D. ambiguous
What does it mean that the genetic code is redundant? That each codon codes for more than one amino acid That each codon can bind to more than one anticodon That most amino acids are coded by more than one codon That each tRNA anticodon can be attached to multiple different amino acids None of the above
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