Mesosomes in bacteria are the functional unit for -
Mesosomes (chondroid) 

Mesosomes are formed by invagination of plasma membrane into the cytoplasm.
They are more prominent in gram-positive bacteria.
They are the principal sites of respiratory enzymes in bacteria and are analogous to mitochondria of eukaryotes.
They coordinate nuclear and cytoplasmic division during binary fission.
Lipid storage
Protein synthesis
Respiratory enzymes
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