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- What feature does Bacillus and Clostridium have in common that is not found among most other bacteria? a. Axial filamentb. Form Endosporesc. High concentration of lipids in cell wall d. Branching cellse. Obligate Intracellular Parasite All of the following pertain to the plague except... a. Rats are reservoirs b. Fleas serve as vectorsc. Outbreaks have never occurred in the U.S.d. Pneumonic type transmitted by aerosol droplets e. Produces swollen lymph nodes Which is not true of virus capsids?a. They surround and protect viral nucleic acidb. Always icosahedral in shapec. Remain outside of host bacterial cells while the nucleic acid is injected into the bacterial celld. Enters host animal cells together with the nucleic acid e. Made up of protein subunits called capsomeres All viruses have: a. DNA b. RNAc. Envelopesd. Glycoprotein spikes e. Host specificity Use the following to select the sequence of events during replication of DNA viruses in animal cells:1 = replication…17. How does soap help in killing bacteria and other pathogens? Choose all that applies V A. Soaps forms insoluble fats in acidic water creating a precipitate known as soap scums. O B. Soap dissolves the fat molecules in the membrane of cells and viral bodies causing the membranes to fall apart O c. Soap contains fat-like substances known as amphiphiles which competes with the lipids found in the cell membranes and virus membranes causing the cell or virus in active. O D. Soaps are surfactants, allowing now the fat molecules in the cell membranes and viruses to mix (emulsify) with water thus reducing their affinity to the skin and are easily washed away by water. E. Dirt molecules, bacteria and viruses are chemically attracted to soap molecules so that they are washed away with the water when you rinse your hands.Which of the following is antiviral drug? O a. Penicillin O b. Streptomycin O c. Acyclovir O d. All
- Which of these molecules is used in adherens (adhesive) junctions? a. Calnexin b. Cadherin c. Connexin d. Claudin1. Eosinophils are extremely toxic to both the parasite and the host, therefore they are controlled by all of the following mechanisms except: A. Limited production in the absence of infection B. Resting eosinophils have high levels of FceRI C. Stimulation of Th2 cells stimulates production of eosinophils D. Chemokines control their migration 2.Sneezing, coughing, wheezing, vomiting, and diarrhea are reactions that all result from: A. Histamine B. Chymotryptase C. Leukotrienes D. ProstaglandinsA bacterium has the following characteristics:∙ It adheres to the human intestinal lining using a feature that protects it from phagocytes, bacteriophages, and dehydration∙ It can survive being boiled∙ It contains no plasmids and relatively little peptidoglycanWhich of the following characteristics allows this bacterium to adhere to the intestinal lining? Group of answer choices A. fimbriae B. pili C. an endospore D. a flagellum
- Research has stated that there are factors that could affect the efficacy and duration of mosquito repellants on our skins. State at least 3 factors that could decrease or influence the efficacies of topical mosquito repellants and explain.Bats found with white-nose syndrome appeared to die because: a the fungal infection affected their wings so they could no longer fly b the fungal infection attacked the areas needed to maintain body temperature, so the bats froze to death c the fungal infection caused them to wake more often and use up their fat reserves, so they died of starvation d their immune system was suppressed, so they contracted other deadly infections e their torpor became so deep they could not wake from their hibernation1. What is the purpose of a cell wall in bacteria? A. Structure B. Protection C. Peptidoglycan production D. a&b 2. Which of the following are features of Flagella? A. Found on the cell surface B. Necessary for movement C. Found only on bacteria D. A & B E. C & D 3. Choose an answer that best describes tthe difference between a plant vs. animal cell A. Only animals have cell walls B. Lysosomes are only found in plant cells C. Plant cells have chloroplasts and mitochondria, animal cells have only mitochondria, and both organelles generate energy in the form of ATP via electron transport. D. Peroxisomes are only found in animal cells 4. Which of the folllowing organelles/complexes makes proteins? A. The Nucleus B. Cytoplasm C. Peroxisomes D. Ribosome E. Golgi Apparatus
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