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.
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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
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
Which does NOT involve testing microbial sensitivity to antimicrobials?
A) disk diffusion method B) dilution method C) minimum inhibitory concentration D) toxic dosage level
An element required by bacteria specifically for the synthesis of both amino acids and nucleic acids
What will be an ideal response?