Question

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

Answer 1

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.