Evolution Question 63
63. Sequence of which of the followings is used to know the phylogeny?
(a) mRNA
(b) rRNA
(c) tRNA
(d) DNA
Show Answer
Answer : b
Hints & Solution
(b) rRNA occurs inside ribosomes and involved in protein synthesis, mRNA brings coded information from DNA to form polypeptides. tRNA takes part in transferring amino acids from cellular pool to episomes for polymerization to form polypeptides. Carl Woese gave the theory of life based on his discovery that the genes encoding ribosomal RNA are ancient and distributed over all lineages of life with little or no gene transfer. Therefore rRNA are commonly used to infer phylogeny.
