Question

Mucopeptide percentage is higher in cell wall of
A. Gram positive bacteria.
B. Gram negative bacteria.
C. Bacteriophage.
D. Cyanobacteria.

Answer 1

Hint: Peptidoglycan is defined as a polymer of sugar and amino acids. Its synthesis is often targeted by antibiotics. it's not present in humans that's why humans aren't killed by antibiotics. it's a serious component of their existence.

Complete Answer:
The term peptidoglycan was derived from the peptides and sugars that make a molecule. Peptidoglycan could also be a polymer consisting of sugars and amino acids that forms a mesh-like layer outside the cell membrane of most bacteria, forming the cell wall.
The special amino acids found during this layer are Diaminopimelic acid and D-alanine. it's a structural role within the cell walls of bacteria, giving structural strength and counteracting the pressure of the cytoplasm. As biology is incomplete without exceptions, here Archaebacteria and mycoplasma lack the peptidoglycan. peptidoglycan may be a distinguishing feature of the gram-positive bacteria.

Now allow us to gather information about given options :
Gram positive bacteria: Gram(+) bacteria devour the violet crystal stain utilized in the test and that they tend to be violet when seen by an optical microscope. This is often because the thick peptidoglycan coating within 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.

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

Bacteriophage: A bacteriophage disease may be a kind 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 macromolecule, surrounded by a protein structure.

Cyanobacteria: Cyanobacteria may be a collection of photosynthetic bacteria. a number of which are nitrogen-fixing bacteria that sleep in a broad class of moist soils and are watered freely or symbiotically with plants.

Hence the correct answer is option A.

Note: Peptidoglycan forms 90% of the dry weight of gram- positive bacteria but only 10% of the gram-negative bacteria. Thus, peptidoglycan may be a distinguishing feature of the gram-positive bacteria. Mucopeptide, an area lattice structure within the bacterial cell wall created by linear chains of alternating amino sugars. The mucopeptide is of course insoluble and located in nearly all the bacterial cell walls.