Isoelectric Focusing

question 37

Multiple Choice

Isoelectric focusing

• A)separates proteins based on the pH at which they are electrically neutral.
• B)separates proteins based on their size and shape.
• C)directly reveals the identity of unknown proteins in a complex mixture.
• D)none of the choices

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Definitions:

Revolving Nosepiece

A part of a microscope that holds multiple objective lenses and can rotate to change magnification.

Objective Lens

An objective lens is the part of a microscope or telescope that gathers light from the sample being observed and focuses it to create an image.

Ocular Lens

The lens inside the eye that focuses light on the retina to create clear images.

Oil-immersion

A technique used in light microscopy where an oil with a high refractive index is placed between the specimen slide and objective lens to increase resolution.