When Casey Opens the Closet Door to Get Some Dog

question 175

Multiple Choice

When Casey opens the closet door to get some dog food,her dog salivates.What is the conditioned stimulus in this example?

• A)dog food
• B)the cat running
• C)the sound of the closet door opening
• D)the dog

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Definitions:

Chymotrypsin

A digestive enzyme classified as a serine protease, which hydrolyzes proteins to form smaller peptides, playing a critical role in protein digestion.

Peptide Structure

The sequence and chemical bonding of amino acids in a peptide, which dictates its three-dimensional shape and function.

Phenylthiohydantoin

An aromatic compound derived from the reaction of amino acids with phenylisothiocyanate, used in sequencing peptides.

Phenylisothiocyanate

An organic compound used in the Edman degradation method for sequencing amino acids in peptides.