DNA is structurally and chemically more stable than RNA because of the following except:
1. | It has thymine instead of uracil |
2. | 2’ –OH is absent in DNA |
3. | It replicates itself based on complementary base pairing |
4. | It does not have any catalytic role |
Who proposed a semi-conservative mode of replication for DNA?
1. | Watson and Crick | 2. | Meselson and Stahl |
3. | Hershey and Chase | 4. | Beadle and Tatum |
The genetic material for the first life on the earth was probably:
1. | ds DNA | 2. | ss DNA |
3. | Protein | 4. | RNA |