The mode of transmission of B. pertussis can best be described as:

a. person-to-person contact.
b. exposure to contaminated water.
c. inhalation of contaminated air.
d. close contact with animals.


A
Infection by B. pertussis is transmitted from person to person, presumably by airborne transmis-sion from the cough of an infected person. Humans are the only reservoir.

Biology & Microbiology

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Which of the following procedures would identify the enzyme that catalyzes the carboxylation of ribulose-1,5-bisphosphate?

A) irradiating a leaf extract with red light B) introducing radiolabeled carbon dioxide into a plant extract and determining which molecules become radiolabeled C) purifying a variety of proteins from plant extracts and testing each protein individually to see if it can carboxylate ribulose-1,5-bisphosphate D) differential sedimentation of a protein extract

Biology & Microbiology

Answer the question using the accompanying figure. At which point in this action potential diagram are many Na+

activation gates open and K+ activation gates closed?

a. A b. B c. C d. D e. E

Biology & Microbiology

Which does NOT involve testing microbial sensitivity to antimicrobials?

A) disk diffusion method B) dilution method C) minimum inhibitory concentration D) toxic dosage level

Biology & Microbiology

An element required by bacteria specifically for the synthesis of both amino acids and nucleic acids

What will be an ideal response?

Biology & Microbiology