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(A) $(i)$ In prokaryotic cells like bacteria,the plasma membrane extends into the cytoplasm to form structures called $Mesosomes$. These are involved

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$(i) Mesosomes, (ii) Pili$

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(A) $(i)$ In prokaryotic cells like bacteria,the plasma membrane extends into the cytoplasm to form structures called $Mesosomes$. These are involved in cell wall formation,$DNA$ replication,and respiration.$(ii)$ $Pili$ are elongated,tubular structures made of a special protein called $pilin$. They are found in many bacteria and are specifically involved in the process of conjugation,which is the transfer of genetic material between bacteria.

Select the correct option for the following statements:
$(i)$ The essential infoldings of the plasma membrane in bacteria are called $Mesosomes$ / $Polysomes$.
$(ii)$ The structures found in long $Gram-negative$ bacteria that help in conjugation are called $Pili$ / $Fimbriae$.

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Select the correct option for the following statements:$(i)$ The essential infoldings of the plasma membrane in bacteria are called $Mesosomes$ / $Polysomes$.$(ii)$ The structures found in long $Gram-negative$ bacteria that help in conjugation are called $Pili$ / $Fimbriae$.