Question

Where do the microtubules of the spindle originate during mitosis in both plant and animal cells?

Answer 1

Answer:

The question lacks options, the options are:

A) Centromere

B) Centrosomes

C) Centrioles

D) Chromatid

E) kinetochore

The answer is B (Centrosomes)

Explanation:

All living cells including plant and animal cells, undergo mitosis, which is a division that produces two identical daughter cells. Prior to the separation of the cell's content (CYTOKINESIS), the nuclear material also separates into opposite poles of the cell.

The spindle microtubules is responsible for the separation of each chromatid into opposite poles by binding to the kinetochore of each replicated chromosome. The microtubules of the spindle originates from the centrioles which are contained in the CENTROSOME (a cellular organnelle). Plant cells so not possess centrosomes, they instead have Microtubules Organizing Centres (MTOC) that functions the same way as centrosomes.

Note that, a centrosome consists of 2 centrioles that are perpendicular to each other. Each centriole is made up of a ring of Microtubules.

Answer 2

Answer:

Centrosomes

Explanation:

The centrosomes are internal cellular organizing centers.

The centrosomes contain centrioles, these organelles are in turn formed by microtubules which are known to generate the cell structure. Moreover, centrosomes also enable the correct segregation of the sister chromatids during mitosis