A genomic condition that may be responsible for some forms of fragile X syndrome, as well as Huntington disease, involves ________
A) various lengths of trinucleotide repeats
B) multiple inversions in the X chromosome
C) multiple breakpoints fairly evenly dispersed along the X chromosome
D) plasmids inserted into the FMR-1 gene
E) single translocations in the X chromosome
Answer: A
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On Monday morning, after you’ve already finished reading your email and begun assembling apparatus for your next series of tests, one of your colleagues arrives late, looking decidedly unwell. After exchanging the usual pleasantries, you find out the reason: There were two oranges in the fridge on Friday before it was your turn to clean it out. The other orange had fewer black mold spots than the one you triple-bagged while holding your breath…and your colleague really loves oranges. What was she suffering from over the weekend?
a. opportunistic mycosis b. mycetismus c. mycotoxicosis d. superficial mycosis
Probes for cloned genes use
a. complementary nucleotide sequences labeled with a tracer b. specific antibodies that kill all the cells except those that have incorporated the genes. c. specific enzymes that lyse all the cells except those that have incorporated the genes. d. certain bacteria that glow when they take up the genes. e. all of these.
Which kingdom contains photosynthetic multicellular organisms that live on the land?
A. Animalia B. Archaea C. Protista D. Fungi E. Plantae
Antitoxins
A. include capsule material against the pneumococcus and meningococcus. B. contain purified, chemically denatured bacterial exotoxin. C. contain antibodies to neutralize specific toxin. D. use vaccinia virus with genetic material of bacterial toxins. E. contain attenuated organisms.