Test 8 3 General Microbiology (MCB 2010 6) Peptidoglycan is made of A) Polysacch

Question

Test 8 3 General Microbiology (MCB 2010 6) Peptidoglycan is made of A) Polysaccharides and Polypeptides B) Disaccharides and Polypeptides C) Dipeptides and Disaccharides D) Polysaccharides and Dipeptides Type: MC Page Ref: 84-87 Topic: cell wall material 7) A disease condition that results from spread of a pathogen or its products in A) Sepsis B) Bacteremia C) Septicemia D) Toxemia Type: MC Page Ref: 402-410 Topic: Gram profile Skill: Requires Recollection 8) Which of these contains Sterols and Carbohydrates? A) Gram Positive Bacterial Cell Wall B) Cell Membrane of Prokaryotes C) Outer Membrane of Gram Negative Bacteria D) Eukaryotic Plasma Membranes Type: MC Page Ref: 98-105 Topic: cells Skill: Requires Recollection 9) Bacterial-digesting enzymes are secreted from A) Lysosomes B) Ribosomes C) Centrosomes D) Nucleosomes Type: MC Page Ref: 98-105 Topic: cell content Skill: Requires Recollection 10) In Gram Negative Bacteria, Peptidoglycan is A) part of the outer membrane B) the primary cell wall material C) a thin, single, layer D) absent from the Cell Type: MCPage Ref: 84-87 Topic: cell wall material Skill: Demonstrate Understanding

Explanation / Answer

6. Answer is Disaccharides and polypeptides.

Peptidoglycanas the name suggests its the polymer made up of amino acids (peptido) and sugars (glycan) it forms mesh like structure outside plasma membrane forming the cell wall. It is also called as murein.

The glycan part consists of alternating residues of ?-(1,4) linked N- Acetyl glucosamine (NAG) and N- Acetyl muramic acid (NAM). Attached to the N-acetylmuramic acid is a peptide chain of 3 to 5 aminoacids.

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