Which of the following is known for its swarming motility?

A. Proteus mirabilis
B. Escherichia coli
C. Klibsiella pneumonae
D. Pseudomonas aeroruginosa


Ans: A. Proteus mirabilis

Biology & Microbiology

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The sac which surrounds the heart is called the

A. endocardium. B. pericardium. C. atrium. D. myocardium

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Heterotrophs that obtain energy and carbon by feeding on both animal and plant materials are called ____

a. detritivores b. herbivores c. carnivores d. omnivores e. decomposers

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Most antihelminthic drugs function by

a. weakening the worms so that they can be flushed out by the intestines b. inhibiting worm metabolism c. blocking absorption of nutrients d. inhibiting egg production

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The rough endoplasmic reticulum is a cell structure that consists of folded membranes that contain ribosomes. What is the advantage of the folded membranes?

A. increases surface area in order to produce more proteins B. decreases surface area in order to produce more proteins C. increases volume of the edoplasmic reticulum in order to produce more energy D. decreases volume of the endoplasmic reticulum in order to make more energy

Biology & Microbiology