During molecules like glucose, use a protein channel to enter or leave the cell. a. active transport b. facilitated transport c. ionic pump mechanisms

Which blood cell spend most of their time in the lymphatic system?

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.