OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Conservative and bidirectional
|
|
|
Semiconservative and unidirectional
|
|
|
Semiconservative and bidirectional
|
|
|
Conservative and unidirectional
|
Detailed explanation-1: -The mode of replication of DNA in E coli is semi conservative and bidirectional. In semiconservative two strands of daughter DNA form from single parent DNA. Bidirectional replication takes place in two directions. Like other bacteria, the replication occurs in its chromosomes.
Detailed explanation-2: -DNA replication is ‘semi-discontinuous’ because one of the strands is synthesized continuously, while the other strand, is discontinuously by the formation of Okazaki fragments. This was discovered in the year 1968 by a Japanese scientist couple-Reiji Okazaki and his wife Tsuneko Okazaki.
Detailed explanation-3: -There were three models for how organisms might replicate their DNA: semi-conservative, conservative, and dispersive. The semi-conservative model, in which each strand of DNA serves as a template to make a new, complementary strand, seemed most likely based on DNA’s structure.