In the organism named E. coli O157:H7, what taxonomic level is the O157:H7 part?

A. Order
B. Genus
C. Strain


Answer: C. Strain

Biology & Microbiology

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Part of a chromosome lacking a centromere breaks away and does not reattach to another chromosome

a. Crossing-over b. Inversion c. Translocation d. Nondisjunction e. Deletion

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Conjugate vaccines which link the target antigen to a more immunogenic antigen are usually for

A) vaccines against viral envelopes. B) vaccines against bacterial polysaccharide antigens. C) vaccines against Gram-negative endotoxin. D) vaccines against bacterial exotoxins. E) vaccines against viral nucleic acid.

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Outline a procedure for creating a "knockout" microbe.

What will be an ideal response?

Biology & Microbiology

Where on this tree is LUCA found?

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

Biology & Microbiology