Multiple Choice
Which two functional groups are present in all standard amino acids?
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3. Amino Acids
Amino Acid Groups
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Which of the following are examples of amine hormones?
A
Cortisol and aldosterone
B
Epinephrine and thyroxine
C
Testosterone and estradiol
D
Insulin and glucagon
Verified step by step guidance1
Step 1: Understand the classification of hormones. Hormones can be categorized into different types based on their chemical structure, such as amine hormones, peptide hormones, steroid hormones, etc.
Step 2: Recall the definition of amine hormones. Amine hormones are derived from amino acids, primarily tyrosine or tryptophan. Examples include epinephrine, norepinephrine, thyroxine, and melatonin.
Step 3: Analyze the options provided. Cortisol and aldosterone are steroid hormones derived from cholesterol. Testosterone and estradiol are also steroid hormones. Insulin and glucagon are peptide hormones composed of amino acid chains.
Step 4: Identify the correct examples of amine hormones. Epinephrine and thyroxine fit the definition of amine hormones because they are derived from tyrosine.
Step 5: Conclude that the correct answer is 'Epinephrine and thyroxine,' as they are examples of amine hormones derived from amino acids.
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