The disease anthrax is caused by a species belonging to which genus?
A. Bacillus
B. Ehrlichia
C. Kingella
D. Vibrio
Answer: A
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Which of the following methods combines nucleic acid amplification testing and mass spectro-metry (MS) for identification of S. aureus and MRSA?
a. Serodiagnosis b. CHROMagar c. The Xpert MRSA/SA test d. PCR/ESI-MS
Which of the following statements is true about the serotonin receptor family?
a. Most of the receptors are ionotropic b. 5-HT1A receptors are located primarily in the cerebral cortex c. 5-HT2A receptors cause inhibition by decreasing adenyl cyclase and increasing potassium efflux d. The newer antipsychotics like Risperdal act by blocking the 5-HT2A receptor e. LSD and similar hallucinogens are most likely agonists at the 5-HT1A receptor
Why is it unlikely that DNA was NOT the first
self-replicating molecule of life?
a. nitrogen is essential for constructing DNA and there was no nitrogen on early Earth b. DNA is hyper-sensitive to oxygen and would have disassembled quickly in its presence c. DNA requires proteins like DNA polymerase for assembly so it doesn’t truly “self-replicate” d. it must have RNA to self-replicate and RNA evolved much later in life’s history e. more than one of these is correct
In a certain population, the allele frequencies of the M and N blood group alleles are 0.6 and 0.4, respectively. How
many of a population of 500 would be expected to have MN blood type if the population is in genetic equilibrium for the MN locus? a. 200 b. 220 c. 240 d. 260 e. 300