In organisms, the ability to control osmosis depends on the properties of the plasma membranes of individual cells. Based on their ability to permit the free movement of water and some solutes, these membranes are described as:
a. impermeable.
b. permeable.
c. selectively permeable.
d. diffusible.
e. impervious.

creative diagnostics provides a protocol for total protein extraction based on ripa which is widely used.

nucleus

would be most reasonable answer tbh

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.