Across
- 6. ....... was the first genetic material.
- 7. DNA being double stranded and having ............ strand further resists changes by evolving a process of repair.
- 9. There are some important biochemical reactions in living systems that are catalysed by RNA catalysts and not by protein enzymes. these are called ..........
- 10. This scheme was termed as ........... DNA replication.
- 11. The scheme suggested that the two strands would separate and act as a .......... for the synthesis of new complementary strands.
Down
- 1. But, RNA being a catalyst was reactive and hence ...........
- 2. While proposing the double helical structure for DNA, Watson and Crick had immediately proposed a scheme for ......... of DNA.
- 3. After the completion of replication, each DNA molecule would have one parental and one ............strand.
- 4. There is now enough evidence to suggest that essential life processes (such as metabolism, ..........., splicing, etc.), evolved around RNA.
- 5. ‘‘It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material’’ (.......... and ........., 1953).
- 7. Therefore, DNA has evolved from RNA with ........... modifications that make it more stable.
- 8. RNA used to act as a genetic material as well as a ............... .