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- 1.Describe a microbial biofilm. Discuss why is it likely that a biofilm contains bacteria with different energy metabolismsWhat is a biofilm? Give an example of a biofilm that is beneficial to humans and one that is harmful.7) Psychrophiles, thermophiles, halophiles, and acidophiles are defined by their unique abilities to thrive in, respectively, environments that are extremely Group of answer choices salty, cold, hot, acidic hot, cold, salty, acidic cold, hot, salty, basic hot, cold, acidic, salty cold, hot, salty, acidic
- 1. Answer the following about Corynebacterium diphtheria... Oxygen requirement: Is it classified as an obligate aerobe, facultative anaerobe, microaerophile, aerotolerant, or an obligate anaerobe? Salt requirement: Is it classified as a nonhalophile, halotolerant, halophilic, or as an extreme halophile? pH requirement: Is it classified as an acidophile, a neutrophile, or an alkaliphile? Temperature requirement: Is it classified as a psychrophile, a mesophile, a thermophile, or a hyperthermophile?5. Explain how air movement and relative humidity affect the growth ofmicroorganisms.Fill in the table below with the carbon source and energy source of each type of microorganism. IV. Microorganism Carbon Source Energy Source Photoautotroph Photoheterotroph Chemoautotroph Chemoautotroph
- 1.What the optimal pH range for Lactobacillus plantarum? Is plantarum an acidophile, neutraphile, or alkalophile? 2. LAB produce organic acids that have shown to be effective against controlling the growth of foodborne pathogens. What specific organic acid is produced by LAB during fermentation? 3.What is the optimal temperature range for Listeria monocyogenes? Is monocyogenes a psychrophile, psychrophile, mesophile, or thermophile?Explain 4 approaches to preventing or limiting biofilms.1. What is the importance of using freshly prepared KOH? 2. What is the chemical constituent responsible for the acid-fast property of Mycobacterium species?
- ● ● Differentiate anaerobes from aerobes and describe how they are cultured. Explain how both aerobes and anaerobes can cause disease. Discuss how biofilms develop. Explain the importance of biofilms to infection. Describe the process of sporulation, and explain how spores impact certain infections.Explain 2 factors that influence microbial growth.Bacteria that are obligate intracellular pathogens of humans are considered to be Autotrophs Heterotrophs Photosynthetic Hyperthermophiles Chemolithotrophs Which of the following statements best describes the pathogenesis of Clostridium botulinum? It elaborates an exotoxin that is a lecithinase that causes tissue necrosis. It elaborates a toxin that suppresses the release of inhibitory neurotransmitters. It produces a polysaccharide capsule that inhibits phagocytosis and contributes to invasion of the central nervous system. It elaborates a toxin that inhibits the release of acetylcholine at cholinergic synapses. It produces a leukotoxin that leads to abscess formation.
