RNA World
RNA World: Overview
This topic consists of various concepts like Structure of RNA,RNA,, etc.
Important Questions on RNA World
Assertion (A): RNA molecule is stable because it participate in reactions.
Reason (R): RNA act as genetic material and also as a catalyst.
The correct option among the following is:

Write any two differences between mRNA and tRNA.

Write three differences between each of the following :
DNA and RNA

Which one of the following processes in E. coli does not directly involve ?

Choose the incorrect statements from the following.
A To cut DNA with restriction enzyme it needs to be in the pure form, free from RNA, protein, polysaccharides and lipids.
B. RNA can be removed by protease enzyme.
C. DNA separated as the suspension can be removed by spooling.
D. DNA can be precipited by adding warm ethanol.
The correct answer is-

RNA contains which of the following sugars?

On the basis of molecular weight, which of the following is the smallest RNA?

The molecular weight to tRNA ranges from

t-RNA contains___number of nucleotides

___ forms about of the total cellular RNA.

___ provides a binding site for mRNA.

The molecular weight of rRNA ranges from

rRNA forms about___of the total cellular RNA

rRNA is permanently associated with



How many types of ribonucleic acids are known?

Match the following RNA with their functions.
1. | mRNA | (A) | Carries activated amino acids for elongation of a polypeptide chain. |
2. | rRNA | (B) | Carries genetic information from the nucleus. |
3. | tRNA | (C) | Associated with the ribosome. |


