Which Molecular Model Best Describes the Structure of the DNA

question 81

Multiple Choice

Which molecular model best describes the structure of the DNA molecule?

• A) Single-stranded,with varying shapes
• B) Straight and antiparallel
• C) Triple-stranded,with varying shapes
• D) Helical,double-stranded,and parallel
• E) Helical,double-stranded,and antiparallel

---

Definitions:

Conditioned Stimulus

A stimulus that initially has no effect but becomes able to provoke a specific response through association with an unconditioned stimulus.

Extinction

In psychology, the process through which a conditioned response decreases or disappears as a consequence of repeated exposure to the conditioned stimulus without the unconditioned stimulus.

Stimulus Discrimination

The learned ability to distinguish between a conditioned stimulus and other stimuli that have not been paired with an unconditioned stimulus.

Conditioned Stimulus

A previously neutral stimulus that, after being repeatedly paired with an unconditioned stimulus, elicits a conditioned response.