Question

Mucopeptide is abundant in the cell of
A) Cyanobacteria
B) Gram(+) bacteria
C) Gram(-) bacteria
D) Bacteriophage

Answer 1

Hint:There are few bacteria that react positively in the Gram stain test. They are used to quickly classify bacteria into two broad categories by cell wall.

Complete answer:
Cyanobacteria is a collection of photosynthetic bacteria. Some of which are nitrogen-fixing bacteria that live in a broad class of moist soils and are watered freely or symbiotically with plants.

Gram(+) bacteria are bacteria that give a positive result in the Gram stain test, which is usually used to easily identify bacteria according to their cell wall into two separate classes.
Gram(+) bacteria pick up the violet crystal stain used in the test and they tend to be violet when seen by an optical microscope. This is because the thick peptidoglycan coating in the bacterial cell wall maintains the stain after it has been washed away from the rest of the sample at the discolouration stage of the examination.

After the discoloration stage, gram(-) bacteria can not retain violet stain. At this point, the alcohol used degrades the outer membrane of gram-negative cells, making the cell wall more porous and unable to retain crystal-violet stain. Their peptidoglycan layer is much thinner and sandwiched between an internal cell membrane and a bacterial outer membrane, causing them to pick up the counterstain and appear red or pink.

A bacteriophage disease is a sort of virus that infects the bacteria. The term "bacteriophage" literally means "eater of bacteria," since the bacteriophages kill the host cells. Bacteriophages consist entirely of a molecule of nucleic acid, surrounded by a protein structure.

Thus, the correct answer is Gram (+) bacteria.

Note:Mucopeptide, a crystal lattice structure in the bacterial cell wall created by linear chains of alternating amino sugars. The mucopeptide is naturally insoluble and found in nearly all the bacterial cell walls.