Practicing Success
Practicing Success
CUET Preparation Today
Assertion: The first cells used RNA as their hereditary molecule. |
Both Assertion (A) and reason (R) are correct and R is the correct explanation of A. Both Assertion (A) and reason(R) are correct but R is not the correct explanation of A. Assertion (A) is true but Reason (R) is not correct. Both Assertion (A) and Reasoning are false (F ). |
Both Assertion (A) and reason(R) are correct but R is not the correct explanation of A. |
The RNA world is proposed as the first stage in the evolution of life in which RNA catalysed all molecules necessary for survival and replication. If the first cells used RNA as their hereditary molecule, DNA evolved from an RNA template. DNA probably did not evolve as a hereditary molecule until RNA based life became enclosed in a membrane. Once cells evolved, DNA probably replaced RNA as the genetic material for most organisms. |
