In the Following Pairs, Which Lists the First Messenger Followed

question 2

Multiple Choice

In the following pairs, which lists the first messenger followed by a second messenger?

• A) insulin; glucagon
• B) ACTH; cortisol
• C) TSH; thyroxin
• D) glucose; insulin
• E) peptide hormone; cAMP

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Definitions:

Methyl Glycoside

Glycosides formed by the reaction of a sugar with methanol, characterized by a methoxy group replacing the glycosidic hydroxyl group of the sugar.

Mutarotation

The change in optical rotation due to the change in equilibrium between two anomers of a sugar solution over time.

Methyl-β-D-Talopyranoside

A chemical compound that is a methyl glycoside derived from the β-anomer of D-talopyranose.

Chair Form

A specific, stable conformation of cyclohexane that minimizes steric strain, resembling a chair.