Question

In a bacterial cell,plasma membrane folds inside to form
A) Mesosomes
B) Mitochondria
C) Nucleoid
D) Lomasomes

Answer 1

Hint: Operans are clusters of structural genes under the influence of a single operator site and a regulatory gene that ensures that the expression of structural genes is regulated in a coordinated manner.

Complete Answer:
>The plasma membrane consists of a semipermeable lipid bilayer. Plasma membrane controls the movement of materials entering and leaving the cell.
>Mesosomes or chondrioids are folded invaginations in the plasma membrane of bacteria created by chemical fixation techniques used to prepare samples for electron microscopy.
>These structures are plasma membrane invaginations found in gram-positive bacteria that have been chemically fixed to prepare them for electron microscopy.
>They were first found in 1953 by George B. Chapman and James Hillier, who referred to them as "peripheral bodies." In 1960, they were referred to as "mesosomes" by Fitz-James
>Initially, it was thought that mesosomes may play a role in many cellular processes , such as cell wall formation during cell division, chromosome replication, or as an oxidative phosphorylation location.
>The mesosome was thought to raise the surface area of the cell, allowing the cell to breathe. This is similar to mitochondrial cristae in eukaryotic cells, which are finger-like projections that help eukaryotic cells undergo cell respiration.
>The outer folding of the plasma membrane in the fungi is called lomasome.

Thus the correct answer is option (A) Mesosomes.

Note:Mesosomes typically take the form of vesicles, tubules, and lamellae.

The key use of mesosomes are:
1) Synthesis of a wall of cells.
2) Replication of DNA.
3) Distribution of daughter cells, respiration, secretions, etc.