EDUCATION: Question Time

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Science  07 Jul 2006:
Vol. 313, Issue 5783, pp. 23
DOI: 10.1126/science.313.5783.23e

How can humans make more than 100,000 proteins if they have only about 25,000 genes? What happens if you get an IV containing pure water rather than saline? For answers to those and more than 150 other questions in genetics, molecular biology, neuroscience, and related fields, check out Ask a Scientist from the Howard Hughes Medical Institute. The queries come from teachers, students, and members of the public; professors, postdocs, and grad students supply the responses. For example, humans can fashion so many proteins because some genes can yield more than one kind of messenger RNA, each of which codes for a slightly different protein. Questions are answered within 2 weeks.

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