Which of the Following Regions on Calf-Thymus Poly(A)polymerase Has Been

question 7

Multiple Choice

Which of the following regions on calf-thymus poly(A) polymerase has been shown experimentally not to be necessary for its activity in vitro?

• A)RNA binding domain
• B)polymerase module
• C)nuclear localization signals
• D)serine/threonine rich regions
• E)All domains are necessary.

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Definitions:

Wet-Mount

A simple microscopic slide preparation technique where a drop of liquid sample is placed between a slide and a cover slip.

Coarse Adjustment Knob

Part of a microscope used for making the initial, rough focusing of the lens on the specimen.

Coverslip

A thin piece of glass or plastic placed over specimens on a microscope slide, holding the specimen in place and providing a clear viewing surface.

Magnification

The process of enlarging the appearance of an object through optical instruments such as microscopes.