Quiz 9 |
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An answer may be used more than once for each section.
1-2. Classify each carrier as a/n (A) antiport; (S) symport; or (U) uniport.
GLUT1 (glucose transporter) |
Ca2+ ATPase |
Na+–K+ ATPase |
Na+–glucose carrier |
HCO3−–Cl− carrier |
3-4. Classify the same carriers as performing (R) primary active transport;
(E) secondary active transport; (D) diffusion, not active transport.
GLUT1 (glucose transporter) |
Ca2+ ATPase |
Na+–K+ ATPase |
Na+–glucose carrier |
HCO3−–Cl− carrier |
5-6. Answer with (C) acetylcholine receptor; (E) epinephrine receptor; (I) insulin receptor; or (L) all three receptors.
a gated ion channel |
an integral membrane protein |
an enzyme (a kinase) |
has helices that rotate |
activates an enzyme indirectly |
desensitized by β-arrestin |
7-10. Answer with (A) adenylyl cyclase; (G) Gα; (P) protein kinase A; or (R) 7tm receptor.
converts ATP to cAMP |
activated by binding the receptor |
converts GTP to GDP |
activated by binding epinephrine |
converts ATP to ADP |
activated by binding cAMP |
not an enzyme |
activated by binding Gsα |
an integral membrane protein |
Its inactive form is heterotrimeric. |
a lipid-anchored membrane protein |
Its inactive form has 4 subunits. |
a protein in the cytosol |
inactivated when cAMP → AMP |
synthesizes a second messenger |
inactivated when GTP → GDP |