Multiple choice

Which among the following is true for phragmoplast?

  1. Proplastid is cytoplasm of dividing cell.

  2. Cell plates are formed by vesicles of ER and dictyosomes during cytokinesis.

  3. Cell plate is formed by ER, dictyosomes, secretory vesicles and spindle fibres.

  4. None of the above
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C Correct answer
Explanation

The phragmoplast is a plant cell specific structure that forms during late cytokinesis. It serves as a scaffold for cell plate assembly and subsequent formation of a new cell wall separating the two daughter cells. The phragmoplast is a complex assembly of microtubules (MTs), microfilaments (MFs), and endoplasmic reticulum (ER) elements, that assemble in two opposing sets perpendicular to the plane of the future cell plate during anaphase and telophase. It is initially barrel-shaped and forms from the mitotic spindle between the two daughter nuclei, while nuclear envelopes reassemble around them.

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