Question

Which of these 5 proteins will elute first from the gel filtration (size exclusion) column? Serum albumin (68 kDa) a-lactalbumin (14.2 kDa) O Lactoferrin (87 kDa) k-casein (19 kDa) O b-lactoglobulin (18 kDa) O Glucagon activation of a G protein-coupled membrane receptor (GPCR) induces GTP binding to which of the following membrane anchored proleins? Gbg Phospdlipase A2 None of the mentioned options The GPCR itself Ga Which of the following sphingolipids is a phospholipid? Sphingomyelin Gangliosides None of the mentioned options Cerebroside Ceramide

Answer 1

1.d.b-lactiglobulin will elute first from the gel due to it's low molecular weights

2.glucagon bind to the Ga receptor anchored to the membrane of the cell

3.spingomyelin is the phospholipid