Which of the following would help a virus avoid triggering an effective adaptive immune response?
I) having frequent mutations in genes for surface proteins
II) building the viral shell from host proteins
III) producing proteins very similar to those of other viruses
IV) infecting and killing helper T cells
A) only I and III
B) only I, II, and IV
C) only II and IV
D) only I, II, and III
E) only II, III, and IV
Answer: B
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Which of the following processes are typically associated with the long-term carbon cycle? Select all that apply
A. respiration B. plate tectonics C. photosynthesis D. volcanic eruptions
In gametogenesis in both human males and females (select all correct choices):
A. diploid stem cells are the precursors to haploid gametes. B. stem cells form during embryonic development and divide by mitosis. C. primary spermatocytes and primary oocytes form by mitosis from diploid stem cells. D. secondary spermatocytes and secondary oocytes form by meiosis from primary spermatocytes and primary oocytes. E. None of these choices are correct.
A genetic counselor will know that the probability of having a child affected with a condition inherited as an
autosomal recessive would be: a. 0.5 or 50% if both parents were homozygous normal. b. 0.5 or 50% if both parents were heterozygous. c. 0.25 or 25% if both parents were homozygous normal. d. 0.25 or 25% if both parents were heterozygous. e. 0% if both parents were heterozygous.
The basal ganglia are particularly implicated in:
A) emotion B) learning and memory C) motor control D) sympathetic nervous system control