When rhodamine-dyed mouse proteins were first mixed with fluorescein-dyed human proteins (in mouse/human hybrid cell fusions), these proteins appeared to exhibit:  restricted movement, based on confinement by diffusion barriers restricted movement, based on tethering to extracellular molecules unrestricted movement, similar to membrane phospholipids restricted movement, based on anchoring to intracellular proteins restricted movement, based on attachment to other cells

A single celled, prokaryote organism has the ability to use the Na+/K+ pump in their cell membrane to move Na+ out of the cell and K+ into the cell. The Na+ /K+ pump is an example of a functional protein because it a) is a Polypeptide presents specific shapes that interact with (binds with) specific molecules, b) uses electrical interactions with these molecules to produce change in its shape or motion. C) interacts with specific molecules based on the fit of the molecule into specific active sites in the protein, d) As a result of the interaction with specific molecules, it can bind with ATP and use the bond energy in the ATP molecule to move the target molecule(s). e) all the answers are true.

Q48

What is Anchorage Dependence? Describe the different Cell Junctions in Animal cells. What is the only Cell Junction in Plant cells?  Why do Plant cells only have one type of Cell Junction? Explain Cell-Cell signaling involving Signal Transduction and G-Proteins.