#Question id: 2252
#Unit 2. Cellular Organization
The generation and maintenance of a membrane electric potential requires which of the following:
a. active pumping of ions
b. ion-specific membrane channel proteins
c. ATP
d. a generally permeable membrane
#Question id: 2253
#Unit 2. Cellular Organization
Match the following lipid linked proteins (column I) with their function (Column II).
|
Column I |
Column II |
|
A. prenylated proteins |
i. These proteins are located in a number of subcellular compartments, including the cytosol, the endoplasmic reticulum, the inner face of the plasma membrane, and the nucleus. |
|
B. fatty acylated proteins |
ii. The core structure of these proteins consists of phosphatidylinositol glycosidically linked to a linear tetrasaccharide composed of three mannose residues and one glucosaminyl residue. |
|
C. glycosylphosphatidylinositol-linked proteins |
iii. The proteins that have covalently attached lipids that are built from isoprene units |
#Question id: 2253
#Unit 1. Molecules and their Interaction Relevant to Biology
Match the following lipid linked proteins (column I) with their function (Column II).
|
Column I |
Column II |
|
A. prenylated proteins |
i. These proteins are located in a number of subcellular compartments, including the cytosol, the endoplasmic reticulum, the inner face of the plasma membrane, and the nucleus. |
|
B. fatty acylated proteins |
ii. The core structure of these proteins consists of phosphatidylinositol glycosidically linked to a linear tetrasaccharide composed of three mannose residues and one glucosaminyl residue. |
|
C. glycosylphosphatidylinositol-linked proteins |
iii. The proteins that have covalently attached lipids that are built from isoprene units |
#Question id: 2254
#Unit 2. Cellular Organization
If the intracellular [Ca2+] is 10−7 mol/L and the extracellular [Ca2+] is 2 × 10−3 mol/L, at what potential difference across the cell membrane will Ca2+ be at electrochemical equilibrium?
#Question id: 2255
#Unit 2. Cellular Organization
Following statements are regarding to the Na+/K+ ATPase maintains the intracellular Na+ and K+ concentrations in animal cells. Which of the following statement is incorrect?
#Question id: 2256
#Unit 2. Cellular Organization
Match the following inhibitors (Column I) with their effect (Column II).
|
Column I |
Column II |
|
A. A23187 |
I. endoplasmic reticulum Ca2+ ATPase inhibitor |
|
B. valinomycin |
II. Na+/K+ ATPase inhibitor |
|
C. thapsigargin |
III. K+ ionophore |
|
D. ouabain |
IV. Ca2+ ionophore |