Cell Cycle and Cell DivisionHard
Question
Balbiani rings (puffs) are sites of
Options
A.DNA replication
B.RNA and protein synthesis
C.synthesis of polysaccharides
D.synthesis of lipids
Solution
Polytenchromosomes (salivary gland chromosomes) are formed by somatic pairing of homolo- gous chromosomes followed by repeaed replication or endomitosis. It results in number of strands each ith transverse light and dark bands position of genes and swellings. Lages swellings are called puffs or Balbiani rings, named after their discover. In such rings, DNA is active, uncoiled for rapid transcription of RNA or protien synthesis.
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