How are proteins normally transported into the mitochondrial matrix, if they were originally synthesized on ribosomes present in the cytosol (not on the rough endoplasmic reticulum)? they are packaged into vesicles with v-SNARES for fusion with their target organelles they can pass freely through large pores in the inner mitochondrial membrane they are secreted by the golgi, captured by receptors, and absorbed by endosomes they must pass through the nuclear envelope by means of nuclear pores they are unfolded in the translocation channel, then refolded by chaperones

Cancer cells treated with vitamin E succinate are generally more vulnerable to rupture of their lysosomal membranes (and subsequent apoptosis) than are normal cells, because: cancer cells often have an acidic cytosol, and their lysosomes have an acidic pH too cancer cells often have an acidic cytosol, but their lysosomes have an alkaline pH cancer cells often have an alkaline cytosol, and their lysosomes have an alkaline pH too cancer cells often have an alkaline cytosol, but their lysosomes have an acidic pH all of the above

IN the figure for D: The organization of a protein that normally resides in the plasma membrane in shown in the figure below. The boxes labeled 1,2 3 and 4 represent membrane-spanning sequences and the arrow represents a site of action of signal peptidase. Given this diagram, which of the following statements must be true? (C) (D) oplasmic Reticulum The N-terminus of this protein is in the ER lumen The mature version of this protein will span the membrane twice, with both the N- and C-terminus in the cytoplasm. Two of the answers are correct The C-terminus of this protein is in the ER lumen

Animal cells need both oxygen and nutrients to survive is it more likely that a Cell would have a plasma membrane receptor for O2 or for sugar? Explain