Quorum sensing in Gram-positive bacteria generally involves the use of ________ as the external signaling molecules.

Fill in the blank(s) with the appropriate word(s).


oligopeptides

Biology & Microbiology

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Which of the following mechanisms of genetic transfer utilizes a physical connection between two bacteria?

A. Transformation B. Transduction C. Conjugation D. All of the answers are correct

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The most common etiologic agent of lower respiratory tract infection among adults younger than 30 years of age is:

a. Chlamydophila pneumoniae. b. Mycoplasma pneumoniae. c. Streptococcus pneumoniae. d. Haemophilus influenzae.

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Which grouping includes all of the protists?

A. Kingdom Plantae B. Domain Eukarya C. Kingdom Animalia D. Domain Archaea

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Which of the following is NOT a recycled

element of an ecosystem?

a. water b. phosphorous c. oxygen d. energy e. more than one of these

Biology & Microbiology