22) cross-linked by short peptide fragments. 22) A) Peptidoglycan B) Mycolic aci

Question

22) cross-linked by short peptide fragments. 22) A) Peptidoglycan B) Mycolic acid C) Outer membrane protein D) Lysozyme is a 23) 23) A bacterial genus that has waxy mycolic acid in the cell walls is A) Salmonella B) AMycobacteriunm C) Mcoplasma D) Corynebacterim E) Streptococcus 24) A prokaryotic cell wall that has primarily peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is 24) A) a protoplast B) a spheroplast C) acid-fast E) gram-positive. 25) Peptidoglycan is a unique macromolecule found in bacterial 25) A) capsules. B) inclusions. C) cell walls D) slime layers E) cell membranes 26) The cellc membrane. 26) -- A) envelope B) pathogenic package C) glycocalyx D) slime coat can be composed of three layers: the cell membrane, the cell wall, and the out 27) The outcome of the Gram stain is based on differences in the cell's 27) A) ribosomes B) inclusions. C) flagella D) cell membrane E) cell wall. ) The short, numerous appendages used by some bacterial cells for adhering to surfaces are called A) periplasmic flagella (axial filaments) B) flagella C) fimbriac D) sex pili

Explanation / Answer

1) Peptidoglycan - Peptidoglycan is a polymer consisting of residues of -(1,4) linked N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) and amino acids that forms a mesh-like layer outside the plasma membrane of most bacteria, forming the cell wall. Attached to the N-acetylmuramic acid is a peptide chain of three to five amino acids.

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