Infoldings of the plasma membrane of gram-positive bacteria give rise to:

It is formed by the extensions of plasma membrane into the cell in prokaryotes.

Mesosome in a bacterial cell is

During $DNA$ replication in prokaryotes,$DNA$ is attached to the........

Read the sentences properly and select the correct option for mesosome.
$(i)$ Mesosome is an extension of the plasma membrane.
$(ii)$ These extensions are only in the form of spheres.
$(iii)$ Mesosomes help in cell wall formation and $DNA$ replication (not $RNA$ synthesis).
$(iv)$ They help in respiration.

Gas vacuole,Single envelope system,Cytoskeleton,Non-cellulosic wall,Microfilaments,Cytoplasmic streaming,Lack of any cell organelles.
How many of the above features are associated with a prokaryotic cell?