What feature of mycobacteria is responsible for the unusually slow growth of these bacteria?

A) Their low tolerance for oxygen retards their growth.
B) They cannot fully metabolize carbohydrates and must rely on fermentation.
C) They have limited numbers of ribosomes so protein production is slow.
D) The mycolic acid in their cell walls requires signification metabolic investment.
E) They lack a cell wall and are extremely fragile.


D

Biology & Microbiology

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The Centers for Disease Control and Prevention (CDC) recommendations for testing in suspected cases of Lyme disease are to screen with ______ and confirm with ________

a. RPR; FTA-ABS b. enzyme-linked immunosorbent assay (ELISA); immunofluorescent antibody (IFA) c. IFA; immunoblotting d. ELISA; TP-PA

Biology & Microbiology

A strain that can grow in minimal medium containing ornithine, citrulline, or arginine, but not in minimal medium alone would have a mutation in the gene that encodes for

Wild type bread mold can grow in a minimal medium without supplements, while certain mutated strains can only grow in a minimal medium that is supplemented with specific intermediates found in the following metabolic pathway for arginine synthesis. See the figure below for an overview of the arginine biosynthetic pathway.

A. enzyme 1.
B. enzymes 1, 2, and 3.
C. enzyme 2.
D. The strain would be the wild type with no genetic mutations.
E. enzyme 3.
F. enzymes 1, 2, and 3.
G. The strain would be the wild type with no genetic mutations.


Biology & Microbiology

In E. coli, ? DNA integrates into which site on the bacterial chromosome?

A) ori B) trp C) bio D) gal E) att

Biology & Microbiology

In rabbits, there are four different versions of the gene for coat color. What pattern of inheritance is this?

A) codominance. B) polygenic inheritance. C) incomplete dominance. D) multiple alleles.

Biology & Microbiology