REAL MICROBIOLOGY EXAM UPDATE WITH Q&A CORRECT ANSWERS 100% GUARANTEED {CLEANEST VERSION}

REAL MICROBIOLOGY EXAM UPDATE WITH Q&A CORRECT ANSWERS 100% GUARANTEED {CLEANEST VERSION} Identify 3 components of both gram positive and negative bacteria. - CORRECT ANSWER--Cell wall -Capsule -Plasma cell membrane Compare/contrast gram (+) and gram (-) bacteria - CORRECT ANSWER-Gram (+) 1. thick peptidoglycan 2. small periplasmic space 3. Teichoic acid Gram (-) 1. THIN peptidoglycan 2. LPS 3. Porins 4. Large periplasmic space Plasmids carry genes for? - CORRECT ANSWER-1. Antibiotic resistance 2. Resistance to heavy metals (Hg, Ag) 3. Resistance to UV light 4. Pili 5. Exotoxins Bacterial shapes: cocci - CORRECT ANSWER-- diplococci (pair) - streptococci - tetrad (4) - staphylococci - Sarcina (cube of 8) Bacterial shapes: Rods (Bacilli) - CORRECT ANSWER--chain of bacilli -flagellate rods -spore former Bacterial shapes: Spirals - CORRECT ANSWER--Vibrios -Spirilla -Spirochaetes The shape of a bacterium is determined by its _____. - CORRECT ANSWER-rigid cell wall Smallest and largest bacteria - CORRECT ANSWER-Smallest: Mycoplasma Largest: Bacillus anthracis Bacteria is a prokaryote with the following characteristics : ______ - CORRECT ANSWER--no nucleus or membrane-bound organelles -chromosomes and plasmids freely float in cytoplasm Function of cells wall - CORRECT ANSWER-• Provides structural support • Made of peptidoglycan (polysaccharide) Function of capsule - CORRECT ANSWER-Sticky outer layer for protection and attachment Function of plasma cell membrane - CORRECT ANSWER-• Directs what enters and exits • Phospholipid bilayer Differences in cell walls gram (-) and (+) - CORRECT ANSWER- Gram positive bacteria structure - CORRECT ANSWER-• Inner plasma cell membrane (phospholipid bilayer) • Thick 'peptidoglycan' cell wall • Outer Capsule Gram negative bacteria structure - CORRECT ANSWER-• Inner plasma cell membrane (phospholipid bilayer) • Thin 'peptidoglycan' cell wall • Another outer plasma cell membrane (phospholipid bilayer - 'lipopolysaccharides') • Outer Capsule Bacteria unlike eukaryotes have no ____ in plasma membrane. - CORRECT ANSWER-sterols Lipopolysaccharide (LPS) is only associated with ______. - CORRECT ANSWER-Gram negative bacteria POLLEV- True or false: Gram (-) Bacteria has a thicker peptidoglycan cell wall than the Gram (+) Bacteria - CORRECT ANSWER-False Essential components of bacteria - CORRECT ANSWER--cell wall (peptidoglycan, outer membrane of gram (-) bacteria, surface fibers -mesosome -nucleoid -periplasm -plasma membrane -ribosome Function of peptidoglycan - CORRECT ANSWER--rigid support -protects against osmotic pressure -penicillin, vancomycin and cephalosporin acts here Outer membrane of gram (-) bacteria has Lipid A which is _____ - CORRECT ANSWER-endotoxin What are bacterial ribosomal subunits? - CORRECT ANSWER-50 s and 30s A periplasmic space in gram negative is ____ - CORRECT ANSWER-bigger Fate of Beta lactamases in gram (+)/(-) bacteria - CORRECT ANSWER-Gram positive flushes out beta lactamases from small periplasmic space Gram negative will store beta lactamases in its bigger periplasmic space Porin channels made up of proteins are outside of ____ bacteria. - CORRECT ANSWER-gram negative Most antibiotics that pass through porin channels (made of proteins) are ______. - CORRECT ANSWER-Hydrophilic Function of polysaccharide - CORRECT ANSWER-major surface antigen frequently used in lab diagnosis function of teichoic acid - CORRECT ANSWER-major surface antigen rarely used in lab diagnosis; found in gram POSITIVE bacteria Nonessential components of bacteria - CORRECT ANSWER--capsule -pilus or fimbria -flagellum -spore -plasmid -granule -glycocalyx