Statement I: | RNA mutates at a faster rate. |
Statement II: | Viruses having RNA genome and shorter life span mutate and evolve faster. |
1. | Statement I is false but Statement II is true. |
2. | Both Statement I and Statement II are true. |
3. | Both Statement I and Statement II are false. |
4. | Statement I is true but Statement II is false. |
Statement I: | RNA being unstable, it mutates at a faster rate |
Statement II: | RNA can directly code for synthesis of proteins hence can easily express the characters. |
Which one of the following is not a criterion of genetic material?
1. | Should not provide the scope for changes for evolution |
2. | Should be able to express itself in the form of Mendelian character |
3. | Should be able to generate its replica |
4. | Should be stable chemically and structurally |
A molecule that can act as a genetic material must fulfill the traits given below, except:
1. | it should be able to express itself in the form of 'Mendelian characters' |
2. | it should be able to generate its replica |
3. | it should be unstable structurally and chemically |
4. | it should provide the scope for slow changes that are required for evolution |
Semiconservative replication of DNA was first demonstrated in:
1. Drosophila melanogaster
2. Escherichia coli
3. Streptococcus pneumoniae
4. Salmonella typhimurium
Due to the discovery of which of the following in 1980, the evolution was termed as RNA world?
1. | m-RNA, t-RNA- rRNA synthesize proteins |
2. | In some viruses, RNA is the genetic material |
3. | RNA has enzymatic property |
4. | RNA is not found in all cells |