The Rings in the Nitrogen-Containing Bases in DNA Are All

question 65

Multiple Choice

The rings in the nitrogen-containing bases in DNA are all flat with _____ electron-pair geometry around each atom.

• A) trigonal-planar
• B) tetrahedral
• C) trigonal bipyramidal
• D) linear
• E) octahedral

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Definitions:

Conditioning

A process of behavior modification by which a subject comes to associate a desired behavior with a previously unrelated stimulus.

Metronome

A device used to mark time at a selected rate by giving a regular tick sound.

Biscuit

A baked food item, typically flour-based, that varies significantly between regions; in the U.S., it refers to a soft bread roll, while in the U.K. it is akin to what Americans call a cookie.

Extinction

In psychology, the gradual weakening and eventual disappearance of a conditioned response when the conditioned stimulus is repeatedly presented without the unconditioned stimulus.