Which of the following viruses is suspected of being a cause of diabetes mellitus?
A) coxsackie A virus
B) coxsackie B virus
C) echoviruses
D) enteroviruses
E) hepatitis A
B
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If the DNA in a cell consists of 20% adenine, it will also have _____ thymine.
a. 30% b. 80% c. 40% d. 20% e. 10%
Which of the following is true for the brain?
A. All parts of the brain are the same in terms of the kinds of neurotransmitters that are used to store information. B. Several kinds of neurotransmitters are used to store information. C. Different parts of the brain are sensitive to different neurotransmitters. D. Neurotransmitters are distributed to various parts of the brain.
Suppose that an F1 dihybrid cross results in a phenotypic ratio of 9:3:4. What does this tell you?
a. The second locus is dominant over the first locus. b. Dominance is incomplete at the second locus. c. Epistasis is occurring. d. Codominance is at the second locus.
Which of the following microbes produces a neuro-exotoxin?
a. Staphylococcus aureus b. E.coli 0157:H7 c. Clostridium tetani d. all of these