In an area that has been "set up" for a heart attack by plaque formation, what is the most direct final trigger likely to be?
A) a sudden drop in LDL levels
B) blood clot formation in the swollen area
C) thinning of the blood
D) a sudden rise in HDL levels
E) eating a fatty meal
Answer: B
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Crop sunflowers are attacked by many fungal pathogens, such as downy mildew and Sclerotinia, resulting in economic losses of millions of dollars per year. What genes would be best to target for the development of new fungus-killing crop treatments (fungicides)?
A. Genes encoding chitin proteins that are shared by downy mildew and Sclerotinia, but absent in sunflower and humans. B. Genes encoding growth proteins that are shared by downy mildew, Sclerotinia, and sunflower, but absent in humans. C. Genes encoding metabolite proteins that are shared by downy mildew, Sclerotinia, and humans, but absent in sunflower. D. Genes encoding basic development proteins that are shared by downy mildew, Sclerotinia, sunflower, and humans. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about drug development? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A human male who undergoes a sex-change operation will be chromosomally
A) XX. B) XY. C) XXY. D) XYY. E) YYY.
Research indicates that ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that _____
A) have identical chemical formulas but differ in the branching of their carbon skeletons B) are mirror images of each other C) differ in the location of their double bonds D) differ in the arrangement of atoms around their double bonds
If Darwin had been aware of genes and their typical mode of transmission to subsequent generations, with which statement would he most likely have been in agreement?
A) If natural selection can change gene frequency in a population over generations, given enough time and genetic diversity, then natural selection can cause sufficient genetic change to produce new species from old ones. B) If an organism's somatic cell genes change during its lifetime, making it more fit, then it will be able to pass these genes on to its offspring. C) If an organism acquires new genes by engulfing, or being infected by, another organism, then a new genetic species will result. D) A single mutation in a single gene in a single gamete, if inherited by future generations, will produce a new species.