Question

Division of the nucleus is called ..........
A. Cytokinesis
B. Karyokinesis
C. Replication
D. None of the above

Answer 1

Hint: Nucleus is a membrane bound organically found in eukaryotic cells. Nucleus as a cell organelle was first described by Robert Brown in 1831.
Cell division is a very important process in all living organisms. The cell division DNA application and cell growth have to take place in a coordinated manner. The process by which a cell duplicates its genome by a sequential event Is known as a cell cycle.
There are two phases in cell cycle Namely, interphase and M-phase.
The M phase represents the phase when actual cell Division occurs. The m phase starts with nuclear division corresponding to the separation of daughter chromosomes and usually ends with Division of cytoplasm.

Complete answer:
CYTOKINESIS: - Division of Cytoplasm is known as cytokinesis. Hence this option is not correct according to the question
KARYOKINESIS:- The nuclear division in Corresponding to the separation of daughter chromosome is known as karyokinesis. Hence, this option is exactly correct.
REPLICATION:- Replication is the process of Producing the two identical organisms from the original copy, replication may be of DNA or RNA. Hence this option is not correct.
NONE OF THE ABOVE:- This option is not correct, as karyokinesis is the division of nucleus.

Note:The interphase, also known as resting phase, is the time during which the cell is preparing for division by undergoing both cell growth and DNA replication in an orderly manner.
Interphase consist of three phases, namely
G1 phase:- G1 phase is present between mitosis and initiation of DNA replication. During the G1 phase the cell is metabolically active and continues growth but does not replicate its DNA.
S Phase:- This phase is also known as synthesis phase marks. The period during which DNA synthesis or replication takes place.
G2 phase:- During G2 phase, proteins are synthesised in preparation for mitosis, while cell growth continues.