Q. Consider a transmembrane protein complex that forms a hydrophilic pore across the plasma membrane of a eukaryotic cell. The pore is made of five similar protein subunits, each of which contributes a membrane-spanning alpha-helix to form the pore. Each alpha helix has hydrophilic amino acid side chains on one […]

The Waldorf family was caught in a fire but escaped. Unfortunately, the father and daughter suffered burns. The father had second-degree burns on his entire chest, abdomen, and both arms, and third-degree burns on his entire left lower extremity. The daughter suffered first-degree burns on her whole head and neck […]

1. The development of genetic engineering has been hailed as a second Industrial Revolution. Do you believe this label is justified? How many products or applications of genetic engineering can you think off? 2. Geneticists are transplanting bacterial genes into tomato plants. One gene in particular delays production of ethylene […]

The sodium-potassium pump in animal cells requires cytoplasmic ATP to pump ions across the plasma membrane. When the proteins of the pump are first synthesized in the rough ER, what side of the ER membrane will the ATP binding site be on? A) It will be on the side facing […]