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Did you know?
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
Did you know?
Excessive alcohol use costs the country approximately $235 billion every year.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.