1. Inositol triphosphate? a) is a water-insoluble messenger molecule b) binds to

ID: 3476412 • Letter: 1

Question

1. Inositol triphosphate?

a) is a water-insoluble messenger molecule

b) binds to the calcium channel of the endoplasmic reticulum

c) is involved in the release of calcium into the cytosol

d) B and C

e) all of the above

2. Which of the following is NOT a method of hormone action?

a) control of ion or molecule transport across cell membranes

b) control of electrical signaling pathways

c) control of enzymatic reaction rates

d) control of gene expression and protein synthesis

e) all of the above are methods of hormone action

3. When stimulated by a particular hormone, there is a marked increase in the activity of G proteins in the membrane. The hormone is probably?

a) a peptide

b) testosterone

c) aldosterone

d) estrogen

e) steroid

4. Peptide bonds are found in?

a) proteins

b) inorganic compounds

c) carbohydrates

d) lipids

e) any type of molecule

1.(e) All of the above

2.(e) All of the above are methods of hormone action.

3.(e) steroid

4.(a) proteins

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