THE CHROMATOID BODIES RESEMBLE CIGAR-SHAPED OR SAUSAGE-SHAPED IN THE CYST OF:
A- ENTAMOEBA COLI
B- ENTAMOEBA HISTOLYTICA
C- ENTAMOEBA GINGIVALIS
D- NONE OF THE ABOVE.
A chromatoid body is a dense structure in the cytoplasm of male germ cells.
It is composed mainly of RNA and RNA binding proteins and is therefore a type of RNP granule.
A- ENTAMOEBA COLI
B- ENTAMOEBA HISTOLYTICA
C- ENTAMOEBA GINGIVALIS
D- NONE OF THE ABOVE.
A chromatoid body is a dense structure in the cytoplasm of male germ cells.
It is composed mainly of RNA and RNA binding proteins and is therefore a type of RNP granule.
The granules resembling a chromatoid body appear for the first time in spermatocytes and condense into a single granule in round spermatids.
The structure disappears again when the spermatids begin to lengthen.
The chromatoid body is crucial for spermatogenesis but its exact role in the process is not known.
However, due to similarities with RNP granules found in somatic cells - such as stress granules and treatment bodies - the chromatoid body would be involved in the post-transcriptional regulation of gene expression.
As the chromatoid body is significantly larger than other known RNP granules, it is visible even in light microscopy and has already been discovered in 1876 by A. von Brunn.
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Clinical Pathology