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- Why are exotoxins more potent than endotoxins?What metabolic pathway is involved with the sudden increase/decrease of the host's body weight?Many pathogenic bacteria are unable to make some of the metabolic compounds needed for growth and have instead evolved enzymes that enable the bacteria to actually invade human body cells. What do these bacteria expect to accomplish by this practice?
- What is meant by mass killing ?The United States has banned the use of the pesticide DDT. Does this mean that DDT can no longer pose a threat to human health in this country?Helicobacter is able to survive the acidic conditions of thestomach by producing which enzyme?(a) β-galactosidase (d) Amylase(b) Coagulase (e) Urease(c) Lactase
- Which one of the following is most likely to interfere with cytochrome P450 metabolism? Cimetidine Ranitidine Sucralfate MetoclorpramideWhich of the following statements correctly describes exotoxins and endotoxins produced by various bacteria? A. endotoxins are secreted into the environment while the bacteria are still alive B. exotoxins are secreted into the environment while the bacteria are still alive C. exotoxins are only released into the environment when the bacteria die and their cell walls break down D. exotoxins are components of the outer membrane of the bacteria that produce themWhich of the following types of pathogenic prokaryotes cause cholera? A. archaea that release an exotoxin B. archaea that release an endotoxin C. bacteria that release an exotoxin D. bacteria that release an endotoxin
- The five stages of the bacteriophage lytic cycle occur in this order:a. penetration, attachment, release, maturation, biosynthesis.b. attachment, penetration, release, biosynthesis, maturation.c. biosynthesis, attachment, penetration, maturation, release.d. attachment, penetration, biosynthesis, maturation, release.e. penetration, biosynthesis, attachment, maturation, release.What is the difference between an endotoxin and an exotoxin?If a mutation occurred in Escherichia coli that deleted the gene for adhesion, what effect might it have on the ability of E. coli to cause urinary tract infections?