STRUCTURAL ORGANISTION OF PLANTS AND ANIMALS
ANATOMY OF FLOWERING PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A
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B
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C
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D
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Detailed explanation-1: -Cell divisions are very few in the quiescent centre as there is very little synthesis of new proteins, RNAs and DNA. Quiescent centre may function as reserve meristem .
Detailed explanation-2: -The quiescent center (QC) of roots consists of a rarely dividing pool of stem cells within the root apical meristem (RAM). The QC maintains the surrounding more frequently dividing initials, together constituting the stem cell niche of the RAM.
Detailed explanation-3: -The quiescent centre (QC) is a small group of cells with low mitotic activity (they divide sometimes, but only rarely). QC’s are to be found at the tips of growing roots, in the root meristem, and are typically surrounded by groups of initial cells.
Detailed explanation-4: -Quiescent center cells show a strong resistance towards ionizing radiation, particularly when compared to the surrounding initial cells, which led to the suggestion [7] that the quiescent center acts as a stem cell reservoir to ensure the regeneration and persistence of the root apical meristem.
Detailed explanation-5: -So, the correct answer is ‘Reserve for replenishment of damaged cells of the meristem’