A yellow slant and butt in Kligler’s iron agar indicates
a. both glucose and lactose were fermented.
b. H2S was produced.
c. both glucose and lactose were fermented and H2S was produced
d. lactose only was fermented.
e. glucose only was fermented.
Answer: a. both glucose and lactose were fermented.
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When you go to your supervisor to give your diagnosis, which of the following hypotheses do you present to support it?
ALD is a fatal disease that results from a lack of peroxisomes in the liver. It is diagnosed by the presence of high levels of very long-chain fatty acids in the blood. The disease results in destruction of brain myelin leading to progressive cognitive impairment, coma, and death by the age of 14. There has never been a case of ALD described in girls. You have just started your internship at the Mayo clinic and a 10-year-old girl comes in who is in a coma and having seizures. Blood tests show she has extremely elevated levels of long-chain fatty acids. This looks like ALD, but a girl has never been afflicted. A. Both her mother and father are recessive carriers of ALD. B. Most of the Barr bodies in her liver have a normal peroxisome gene. C. Her mother is a carrier for ALD. D. She has Turner syndrome. E. Her mother is a carrier, and she could have genetically normal Barr bodies in the liver or Turner syndrome.
Primary growth in plants originates in
A. apical meristems. B. lateral meristems. C. vascular cambium. D. cork cambium. E. tracheids.
At equilibrium, all molecular movement stops
a. True b. False
Transferring Euglena into a dark environment results in the loss of photosynthetic pigment. What conclusion does this support?
A. Euglenoids are neither plant-like or animal-like protists. B. Euglenoids are closely related to plants. C. Euglenoids are obligate photoautotrophs. D. Light triggers heterotrophy.