Question

Which of the following statement are incorrect ?
(i)RNA act as a genetic material as well as a catalyst.
(ii)RNA is more stable than DNA
(iii)RNA has evolved from DNA
A. (i) and (iii) only
B. (ii) and (iii) only
C. (i), (ii) and (iii)
D. (i) and (ii) only

Answer 1

Correct Answer - b
(b) : Evidences suggest that essential life processes such as metabolism, splicing , translation, etc. evolved around RNA . RNA used to act as a genetic material as well as a catalyst and being a catalyst it was reactive and hence unstable. Therefore, DNA has evolved from RNA with chemical modifications.