With the sequence of the gene-coding regions of the human genome in hand and the development of newer

sequencing methods, scientists ____.
a. now know that the types of mutations present in all cancers are very similar
b. can now sequence and analyze the protein-coding genes in cancer cells
c. are still unable to systematically identify all the mutations present in a cancer cell
d. found that the number of mutational events that occur during the transition from normal to malignant cells is
much smaller than previously thought
e. found that most tumors had at least 100 mutations in common with any other tumor, emphasizing the common
origin of cancer


b

Biology & Microbiology

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Lysosomal storage diseases are the result of deficiencies in lysosomal proteins. An example of one such disorder is

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Specimens are prepared for ________ microscopy using electron-dense stains

A) atomic probe B) bright-field C) confocal D) transmission electron E) scanning tunneling

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As soils dry, root cells at the root tip produce _________, which ____________

A. abscisic acid; stimulates root elongation B. abscisic acid; suppresses root elongation C. ethylene; stimulates root elongation D. ethylene; suppresses root elongation E. auxin; stimulates root elongation

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In gymnosperms and angiosperms, a plant embryo (young sporophyte) packaged with a food supply in a tough outer coat is a

A. sperm. B. seed. C. pollen grain. D. gemmae. E. fruit.

Biology & Microbiology