A physician sends a stool sample to your lab, and wants to know if there are lactose fermenting microbes in the sample. How might you determine if these microbes are present or not from this mixed-microbe specimen?
A. Streak the sample for isolation on Thayer-Martin agar (which contains lactose and particular antibiotics for selectivity).
B. Streak the sample for isolation on a blood agar plate (which contains lactose AND red blood cells that enrich the culture for iron).
C. Streak the sample for isolation on a MacConkey agar plate (which contains lactose and a pH indicator that turns pink when acid byproducts are present).
D. None of the above would work-there's no way to reliably determine this feature from the specimen given.
C
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The ability to determine where a sound is coming from depends primarily on
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The alkylating agent nitrosoguanidine adds methyl groups to nucleotide bases and is repaired by which enzyme that removes the added methyl group and restores nucleotides to their normal form?
What will be an ideal response?
Define the terms triploidy and autosomal trisomy and describe characteristics and consequences of each genetic
disorder.What will be an ideal response?