Which opportunist is the most frequent cause of life-threatening pneumonia in AIDS patients?
A. Pneumocystis (carinii) jiroveci
B. Candida albicans
C. Malassezia furfur
D. Cryptococcus neoformans
Answer: A
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What is a primary difference between polymerase chain reaction (PCR) and traditional cloning procedures such as those used to clone the human growth hormone gene?
A) PCR and traditional cloning make use of different types of bacteria. B) PCR and traditional cloning make use of different types of vectors. C) PCR uses plasmid vectors, whereas traditional cloning uses bacteria. D) PCR eliminates the need for restriction enzymes, vectors, and cells. E) PCR is more time-consuming, but the purity of the obtained DNA clone is much higher than in traditional cloning.
Overexpression of proteins using bacteria :
A. makes subsequent purification of the recombinant DNA harder. B. requires bacterial promoters to be present in the bacterial vector. C. requires eukaryotic promoters to be present in the bacterial vector. D. requires eukaryotic ribosome binding sites to be present in the bacterial vector. E. results in a properly folded, active protein.
Bacteria that produce nitrite ( NO2- ) during anaerobic respiration would use ___ as their final electron acceptor.
A. NO3- B. O2 C. N2 D. N2O
Answer the following statements true (T) or false (F)
1.The hypothalamus is both part of the central nervous system and part of the endocrine system. 2.ADH has roles in both homeostatic control of water in the blood and in connecting sexual and social behavior. 3.ADH receptors in an appropriate part of the brain lead to rewards, which enhance social behavior in voles. 4.Researchers Pitkow and Young observed altered kidney function and social behavior in voles with extra ADH. 5.Seasonal affective disorder can be treated with supplemental lighting.