Buffers Which Lack Biological Activity and Are Unlikely to Interfere

question 20

Multiple Choice

Buffers which lack biological activity and are unlikely to interfere with any biochemical reactions include:

• A) Tris.
• B) Hepes.
• C) Phosphate.
• D) Both Tris and HEPES.
• E) All of these.

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Definitions:

API Gravity Degrees

A measurement system used to determine the density of petroleum liquids compared to water.

Price Per Barrel

The cost or price unit for crude oil and other commodities, measured per barrel, a standard unit for volume in the oil industry.

Standard Error of Estimate

The standard error of the estimate is a measure of the accuracy of predictions made with a regression line, quantifying the dispersion of observed values around the predicted values.

API Gravity Degrees

A measure of how heavy or light a petroleum liquid is compared to water, used in the oil industry to characterize crude oil.