Which the following statements is/are true about the stacking gel?

i. The stacking gel solution contains acrylamide.

ii. It is on the top of the separating gel.

iii. It is used to dilute the protein sample before it enters the main separating gel.

iv. It is into this gel that the wells are formed and the proteins loaded.

#Question id: 1123

#Section 3: Genetics, Cellular and Molecular Biology

Epinephrine can be what kind of signaling molecule?

a. autocrine      b. direct contact  c. endocrine d. paracrine

#Question id: 1124

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following is (are) intracellular second messengers?

a. Ca2+                        b. cAMP          c. epinephrine             

d. protein kinase A      e. protein kinase C

#Question id: 1125

#Section 3: Genetics, Cellular and Molecular Biology

Examples of G protein–coupled receptors include

a. rhodopsin receptor.             b. β-adrenergic receptor.

c. insulin receptor.                   d. acetylcholine receptor.

#Question id: 1126

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following statement(s) is (are) true of the α subunit of a G protein?

a. It physically associates with the receptor.              

b. It binds GDP.

c. It binds GTP.                     

d. It is a transmembrane protein.

#Question id: 1127

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following steps does not occur after acetylcholine binds to the muscarinic acetylcholine receptor in heart muscle cells?

#Question id: 1128

#Section 3: Genetics, Cellular and Molecular Biology

During the epinephrine stimulated conversion of glycogen to glucose 1-phosphate, which of the following steps involves protein phosphorylation?

a. inactivation of glycogen synthase               b. activation of protein kinase A

c. activation of adenylyl cyclise                      d. activation of glycogen phosphorylase