Wall of Gram +ve bacteria possess
Gram positive cells are characterized by presence of single thick layer of cell wall which is made up of peptidogycan, teichoic acid and lipoteichoic acid. Teichoic acid is acidic polymer of ribitol phosphate /glycerol phosphate and is covalently linked to peptidoglycan layer. Acetic acid is organic compound and is the main component of vinegar. Glutamic acid is one of the 20 standard amino acids and also serves as neurotransmitter. Malic acid is organic compound and serves as important intermediate in number of biochemical pathways; Kreb cycle and Glyoxalate cycle, etc. Thus, the correct answer is option B.
Arrange the following steps in a correct sequence as per Gram's staining technique: Treatment with $$0.5$$% iodine solution $$(1)$$, washing with water $$(2)$$, treatment with absolute alcohol/ acetone $$(3)$$, staining with weak alkaline solution of crystal violet $$(4)$$.
Select the correct option: Which of the given statements are correct? (i) Bacillus subtilis is a Gram $$(+)$$ bacteria. (ii) Escherichia coli is a Gram $$(-)$$ bacteria. (iii) Washing of the Gram's stain in Gram $$(-)$$ bacteria is due to high lipid content of the cell wall, which gets dissolved in organic solvent like acetone.
Outer layer of lipopolysaccharide is characteristic of
Gram negative bacteria possess