What are the two goals of the NIH Roadmap Epigenomics Project?
What will be an ideal response?
The goals are to (1 ) provide a set of at least 1000 reference epigenomes in a range of cell types from healthy and diseased individuals and (2 ) delineate the epigenetic differences in healthy and diseased states.
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Which component is a peripheral protein?
A) A B) B C) C D) D E) E
Researchers studying the rigidity and flexibility of the cell envelope used chemotaxis to measure the ability of microbes to squeeze through tight spaces. E. coli, a gram-negative bacterium, was able to traverse narrower channels than B. subtilis, a gram-positive microbe, even though both cells are the same size when grown without restriction. E. coli has the more flexible cell envelope because
A. it has only a single membrane. B. lipopolysaccharide has no charge. C. it has fewer flagella. D. there is less structural carbohydrate. E. there are fewer protein receptors.
Blood pressure depends on:
a. total blood volume only b. cardiac output only c. degree of arteriole dilation only d. total blood volume and cardiac output only e. total blood volume, cardiac output, and degree of arteriole dilation
Which of these humans is the "fittest" as far as natural selection is concerned?
A) a person who lives to the age of 105 and has two children B) a very popular film star who is still alive, is very rich, and has three children from three spouses C) a person who lives to the age of 110 and has no children D) a person with seven children who is killed in an automobile accident at age 40