7.The APC protein- ----. a. is essential for degrading B-catenin. b. causes increased activation of B-catenin c. helps to regulate cell motility d. a and c e. b and c 8. Which of the following statements is NOT true of the pRb protein? a. pRb is functionally inactive when it is hyperphosphorylated. b. pRb is mostly unphosphorylated during the G0 phase of the cell cycle. c. pRb promotes growth during early Gl phase. d. RRb phosphorylation is initiated by D-type cyclins and CDK4/6. e. pRb is functionally inactivated at the R point.

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.