A metric prefix is a shorthand

notation used to denote very large or vary small values of a basic unit as an

alternative to expressing them as powers of 10. Basic units frequently used in the biological

sciences include meters, grams, moles, and liters.Because of their simplicity, metric

prefixes have found wide application in molecular biology. The following table lists

the most frequently used prefixes and the values they represent.

notation used to denote very large or vary small values of a basic unit as an

alternative to expressing them as powers of 10. Basic units frequently used in the biological

sciences include meters, grams, moles, and liters.Because of their simplicity, metric

prefixes have found wide application in molecular biology. The following table lists

the most frequently used prefixes and the values they represent.

**Metric Prefix**

1 nanogram (ng) is equivalent to

1*10^-9 grams. There are, therefore, 1*10^9 nanograms per gram

(the reciprocal of 1*10^-9; 1/1*10^9 = 1*10^-9). Likewise, since

one microliter (uL) is equivalent to 1*10^-6 liters, there are

1 x 10^6 uL per liter.

1*10^-9 grams. There are, therefore, 1*10^9 nanograms per gram

(the reciprocal of 1*10^-9; 1/1*10^9 = 1*10^-9). Likewise, since

one microliter (uL) is equivalent to 1*10^-6 liters, there are

1 x 10^6 uL per liter.

When expressing quantities with metric

prefixes, the prefix is usually chosen so that the value can be

written as a number greater than 1.0 but less than 1000. For

example, it is conventional to express 0.00000005 grams as 50 ng

rather than 0.05 ug or 50,000 pg.

prefixes, the prefix is usually chosen so that the value can be

written as a number greater than 1.0 but less than 1000. For

example, it is conventional to express 0.00000005 grams as 50 ng

rather than 0.05 ug or 50,000 pg.

**Reference**:

Mathematics in molecular biology and biotechnology

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