Phpr 813 study questions Study guides, Class notes & Summaries

PHPR 813 Study Questions with 100% Correct Verified Answers Is Mycobacterium gram positive or negative? gram positive (purple) Tell me something about Mycobacterium's cell wall it has a high lipid content (wax-like appearance) - mycolic acids - lipoarabinomannan Acid fast stain is used to differentiate this bacteria

What are bacterial nucleic acids DNA (forms a nucleoid) and Plasmids How many base pairs in bacterial DNA several million Roughly how many base pairs in plasmids ~20,000 What are the subunits in prokaryotic ribosomes 50S and 30S = 70S sedimentation Which ribosomal subunit can help identify a specific microbe 30S subunit

Bacteria Structure Capsule, outer membrane (only in gram-negative bacteria), cell wall murein, cytoplasmic membrane, nucleus equivalent, plasmid, 70S ribosomes, depot substances (metaphosphates, glycogen), flagella, attachment pili Gram-Positive Bacteria Thick peptidoglycan membrane (cross-links between NAM + peptide and NAG)

Do gram + or - cells have an outer-membrane? gram negative What component of a bacterial cell is made of peptidoglycan? cell wall Describe the order of membranes in bacterial cells? Capsule (all cells) Outer membrane (gram - only) Cell wall (peptidoglycan) Cytoplasmic membrane

Fungi How do Fungi differ from mammalian cells? - contain a rigid cell well - cell wall sterol is ergosterol rather than cholesterol What is responsible for the rigidity of fungal cells? - chitin - glucan (polymers of sugar)