Question

Which of the following statements is correct?
A. When volutin is stained by basic dyes, these granules show different colours. Therefore, they are also termed metachromatic granules.
B. The volutin granules are phosphate polymers and function as a storage reservoir for phosphate.
C. Bacterial DNA is attached to the cell membrane and the membrane may be involved in the separation of duplicated DNA daughter cells during division.
D. All the above

Answer 1

Hint: Bacteria classify under the monera. We can see different parts of bacteria with the help of the dye staining process. Bacteria reproduce mainly by the asexual method and also show sexual recombination. Asexual reproduction involves binary fission and through endospores.

Complete answer:
On dying bacteria, some parts react with dye and become colourful. These parts of bacteria are called metachromatic granules. The first identified metachromatic granule is Acidocalcisomes they react with blue dye. They are also called volutin granules. The Colour reaction of volutin granules can be observed by light microscopy. On staining with blue dyes cytoplasm of bacteria appear blue but metachromatic granules appear red-violet. It contains energy-rich compounds that act as reservoirs of energy called polymerized inorganic phosphate.
Bacteria reproduce mainly by the asexual method and also show sexual recombination. Binary fission is the most common method under favorable conditions of temperature, moisture, and availability of nutrients. The mature bacterial cell divides into two daughter cells.
After the bacterial chromosome divides resulting in the formation of two circular chromosomes.
 The parent chromosome is attached to the mesosome. The mesosome begins to divide because of the synthesis of membranes between the DNA mesosome attachment sites. As a result of the synthesis of cytoplasmic membranes between mesosomes, each mesosome is pushed to the middle of a daughter cell. Because one chromosome is attached to each mesosome, the daughter chromosomes get properly partitioned into the daughter cell.
So, the correct answer is (D).

Note: The last step in binary division is cross wall formation. In this, a peripheral ring of the plasma membrane invaginates and continues to grow until the two cells are separated. The cell wall materials are also deposited between the membranes completing the division of the cell.