Within a Double-Stranded DNA Molecule, Adenine Forms Hydrogen Bonds with Thymine

question 1

Multiple Choice

Within a double-stranded DNA molecule, adenine forms hydrogen bonds with thymine, and cytosine forms hydrogen bonds with guanine. What is the significance of the structural arrangement?

• A) It allows variable width of the double helix.
• B) It permits complementary base pairing.
• C) It determines the tertiary structure of a DNA molecule.
• D) It determines the type of protein produced.

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Definitions:

Just Noticeable Difference

The minimum difference in stimulation that a person can detect 50% of the time.

Absolute Threshold

The minimum intensity of a stimulus that one can detect 50% of the time, a concept central to the study of sensory processes.

Taste Constancy

The perception that the flavor of a food item remains consistent despite changes in the environment or context.

Proximal Stimulus

The stimulus registered by the sensory receptors, e.g., the pattern of light falling on the retina, as opposed to the actual object in the environment.