Two types of transport of molecules across a cell membrane are: transport 1: solute molecules move across the cell membrane along their concentration gradient; requires no energy expenditure. transport 2: solute molecules move across the cell membrane against their concentration gradient; requires expenditure of energy. which statement is correct? a) transport 1 describes passive transport by diffusion. b) transport 2 describes passive transport by the na+/k+ pump. c) transport 2 describes passive transport by a carrier protein. d) transport 1 describes facilitated transport of substances through the membrane.
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Which group of molecules are targeted by the kinases in order to control this movement
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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.
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Two types of transport of molecules across a cell membrane are: transport 1: solute molecules move...
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