In the process of DNA replication, the two strands are synthesized in an antiparallel fashion. One strand is synthesized in 5’ to 3’ direction whereas the other strand is formed in 3’ to 5’ direction. The DNA polymerase is capable of adding the deoxyribonucleotides only in 5’ to 3’ direction. Hence, the opposite strand is formed by some small, discontinuous fragments of DNA that are synthesized in the backward direction. These small, discontinuous fragments of DNA are termed as Okazaki fragments.
These fragments are glued together by the action of an enzyme known as DNA ligase and this new daughter strand is called the lagging strand. The replication of this strand is initiated by a small piece of RNA which gets extended by the DNA polymerase. This RNA fragment is known as RNA primer.
How is an F′ factor different from an F factor?
Meiotic nondisjunction is much more likely than mitotic nondisjunction. Based on
In fruit flies, curved wings are recessive to straight wings,
What is an advantage and a disadvantage of this repair system?
Explain the type of speciation (allopatric, parapatric, or sympatric
The raw material for evolution is random mutation. Discuss whether or
With regard to the timing of conjugation, explain why the recipient
A woman who is heterozygous, Bb, has brown eyes;
A recessive allele in mice results in an unusally long neck.
Why is an antibody used in this experiment? From
