Home › AP Biology › Biology › Genes and Proteins › The universality of the genetic code is describe…
The universality of the genetic code is described as powerful evidence that life on Earth shares:
AA common origin
BAn identical genome
CThe same environment
DOne reproductive mode
Answer & Solution
Correct answer: A. A common origin
1. The same code appears across very different organisms.
2. There is only one genetic code across life on Earth.
3. That is powerful evidence that all of life on Earth shares a common origin.
4. The point is stronger given about 10 to the 84 possible combinations.
5. Those combinations come from 20 amino acids and 64 triplet codons.
_Source: OpenStax Biology 2e (CC BY 4.0), Ch 15 'Genes and Proteins', sections 15.1-15.5_
Related questions
Once a prokaryotic gene is transcribed, termination signals instruct the polymerase to:At the start of the elongation phase of translation, the initiating methionyl transfer RNASixty-four codons encode about twenty amino acids, which requires the code to be:Inserting one or two nucleotides changes the triplet reading frame, altering the message fThe transcription elongation phase in prokaryotes begins with the release from the polymerTransfer RNA folds so that the amino acid binding site sits at one end and at the other enThe nucleotide pair corresponding to the first messenger RNA nucleotide transcribed is calThe DNA strand from which transcription always proceeds for a given gene is the: