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Question

Cells of quiescent centre are characterised by

A
Dense cytoplasm and prominent nuclei
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B
Light cytoplasm and small nuclei
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C
Dividing regularly to add to the corpus
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D
Dividing regularly to add to tunica
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Solution

The correct option is B Light cytoplasm and small nuclei
  • The quiescent centre or QC is a part of the root-promeristems that contains the initials of epidermis, cortex and stele.
  • The cells here divide less frequently as they are inactive and are present at the pole of cortex and stele.
  • The cells with QC have small dictyosomes, nuclei and nucleoli with little cytoplasm.
  • These cells also have little endoplasmic reticulum, mitochondria and contain low concentrations of RNA, DNA and protein than the other cells of the root apex.
  • So, the correct answer is 'Light cytoplasm and small nuclei'.

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