Micro Chap 4 Homework – Flashcards
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Tumbles occur when
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the flagella rotate clockwise
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Which type of bacterial cells would have only a single flagellum?
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Monotrichous
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Peritrichous bacteria make a run when
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the flagella turn clockwise and become bundled
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What type of bacteria have flagella located at only one end of the cell?
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Lopotrichous and Monotrichous
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What molecule is shared by both gram positive and gram negative organisms?
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NAM
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Amoxicillin is an antibiotic that inhibits the formation of peptide crosslinks, therefore it will most likely inhibit the growth of
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both gram positive and gram negative organisms
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Porins are present in _______________ bacteria, in these organisms, molecules entering the cell must pass through an extra layer of ________________.
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Gram negative, membrane
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What type of molecule would be blocked by a cell membrane?
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ions
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Hydrophobic molecules would enter a cell
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through integral transport proteins
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What is a hallmark of passive transport across a cell membrane?
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it occurs along an electrochemical gradient and may involve the use of transport proteins
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A positively charged sodium ion
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would require the use of integral protein channels to pass through a cell membrane
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True or false: Cell walls of bacteria are responsible for the shape of the bacteria and the difference in the Gram stain reaction
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TRUE
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which structure acts as an invisibility cloak and protects bacteria from being phagocytized?
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capsule
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In a gram positive cell, does the cell wall protect it in a hypertonic solution?
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NO
