a) Based on the general features of each category of microbe, which is not matched appropriately? Group of answer choices Molds: have cell walls made of chitin; use spores to reproduce Protozoa: lack cell walls; may alternate between cyst and trophozoite forms Bacteria: typically have bacilli, spirilli, or cocci shapes; exhibit dimorphism Archaea: have unique cell walls; may live in unusual and extreme habitats Yeasts: have cell walls made of chitin; reproduce by budding b) The O antigen Group of answer choices Is part of a peptidoglycan monomer Is structurally unique to each gram-negative species Is hydrophobic Can cause endotoxic effects Is located on the surface of the cell membrane
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2. The peptidoglycan is a cell wall polymer and the enzyme lysozyme inhibits the formation of: A. Teichoic acid B. Lipopolysaccharide C. Backbone which is composed of two amino sugars (N-acetylglucosamine and N-Acetyl muramic acid) D. Tetrapeptide side chains E. peptide cross bridges 3. The process by which a bacteriophage (virus) carries a small fragment of the chromosome or a plasmid from one bacterial cell to another is called: A. Transformation B. Conjugation C. Transduction D. Transfection 4. Most bacteria reproduce by: A. Budding B. Conjugation C. Spores D. Binary Fission (transverse fission) 5. Infections caused by Mycoplasma pneumoniae can be treated with: A. Penicillin B. Cephalosporins C. Ampicillin D. Tetracycline 6. Escherichia coli: A. is a gram-negative bacilli B. has a cell wall that contains an endotoxin C. is a gram-positive bacilli D. A and B E. B and C
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Which of the following are differences between bacteria and archaea? a. The molecular architecture of their cell walls b. The type of ribosomes found in each c. Archaea have an internal membrane system that bacteria lack d. Both a and b are correct.
The ___ are parasitic eukaryotes that live in other cells. a. viruses b. apicomplexans c. euglenoids d. slime molds e. both a and b f. all are correct.
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