Which of the following contributes to the pathogenesis of Cryptococcus neoformans?
A. the ability to produce hyphae which penetrate tissues
B. the production of leukocidins
C. the production of mucinase
D. the ability to resist killing after phagocytosis
E. the production of melanin and the presence of a phagocyte-resistant capsule
Answer: E
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Pyrite (FeS2) is common in bituminous coal and metal ores and is a critical component of the microbial leaching of ores and acid mine drainage
Indicate whether the statement is true or false.
What enzyme is required to produce ATP during oxidative phosphorylation?
a. glucase b. ATP synthase c. acetylcholinesterase d. pepsin
Matching II. Choose the one most appropriate
answer for each. 1. ___ anthropoids 2. ___ australopith 3. ___ hominids 4. ___ hominoids 5. ___ Miocene 6. ___ Neandertals 7. ___ primates 8. ___ Pliocene A. a group that includes apes and humans B. a population of Homo spp. that lived from at least 100,000 to as recently as 30,000 years ago; tool users and artisans C. the order that includes animals with freely swiveling limbs, mobile grasping digits, upright body posture, good depth perception, and exquisite neural control D. organisms in a group that includes New World and Old World monkeys, apes, and humans E. an era that began 65 to 63 million years ago; characterized by the evolution of birds, mammals, and flowering plants F. an epoch of the Cenozoic lasting from 23.8 million to 5.3 million years ago; characterized by the appearance of primitive apes, whales, and grazing animals G. an epoch of the Cenozoic lasting from 5.3 million to 1.8 million years ago; characterized by the appearance of distinctly modern plants and animals H. bipedal organisms from about 3.2 to 2.3 million years ago, with essentially human bodies and ape-shaped heads; ”Southern Apes” I. a group including humans and human-like species
If calcium is not present in the muscle cell what complications can occur in regards to muscle contraction?
A. Tropomyosin will not be pulled away from the myosin binding sites. B. The power stroke will not be produced preventing the actin filament from moving. C. Myosin heads will not bind to the actin filament. D. All of these are complications resulting from a lack of calcium.