Based on your knowledge of cellular and viral processes, which of the following would be (an) appropriate target(s) for antiviral drugs?
A) integrases
B) aminoacyl-tRNA synthetases
C) ribosomes
D) aminoacyl-tRNA synthetases and ribosomes
Answer: A
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_____ was the first hominin to leave Africa and did so around _____ million years ago
A. Homo ergaster (H. erectus); 2 B. Ardipithecus ramidus; 4 C. Australopithecus afarensis; 3.2 D. H. neanderthalensis; 0.6 E. H. habilis; 1.7
The movement of nutrient in the form of a gas takes place in which cycle?
a. global water cycle b. atmospheric cycles c. sedimentary cycles d. solar-plant cycle e. all of these
Each of the following is a way cancer cells avoid growth and invasion restriction imposed by the immune system except
A) They produce a heterogeneous group of cells. B) They respond to density-dependent growth factors. C) They produce molecules that inhibit T lymphocyte function. D) They surround themselves with dense supporting tissue. E) They express low levels of surface antigens.
Fossil evidence and other observations have enabled scientists to recognize several trends in hominid evolution. Which of the following trends appeared earliest in hominid evolution?
A) the ability to use language B) the ability to make and use tools C) an increase in the size of the teeth D) the ability to walk upright on two legs