Mastering Biology: Cell Membrane Review – Flashcards

For a protein to be an integral membrane protein, it would have to be_________.

You have a planar bilayer with equal amounts of saturated and unsaturated phospholipids. After testing the permeability of this membrane to glucose, you increase the proportion of unsaturated phospholipids in the bilayer. What will happen to the membrane's permeability to glucose?

According to the fluid mosaic model of cell membranes, phospholipids___________.

The membranes of winter wheat are able to remain fluid when it is extremely cold by_________.

Some regions of the plasma membrane, called lipid rafts, have a higher concentration of cholesterol molecules. At higher temperatures, these regions__________.

What kinds of molecules pass through a cell membrane most easily?

Which of the following most accurately describes selective permeability?

Which of the following is a characteristic feature of a carrier protein in a plasma membrane?

Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly?

Which of the following allows water to move much faster across cell membranes?

You are working on a team that is designing a new drug. For this drug to work, it must enter the cytoplasm of specific target cells. Which of the following would be a factor that determines whether the molecule selectively enters the target cells?

Three lab groups carried out an experiment to identify the correct molarities for five solutions. Each unknown contained one of the following sucrose concentrations: From the data given, which statement most accurately describes what is occurring in response to a particular unknown solution?

When a plant cell, such as one from a rose stem, is submerged in a very hypotonic solution, what is likely to occur?

In which of the following would there be the greatest need for osmoregulation?

Which of the following statements correctly describes the normal tonicity conditions for typical plant and animal cells? the animal cell is in________.

What will happen to a red blood cell (RBC), which had an internal ion concentration of about 0.9 percent, if it is placed into a beaker of pure water?

Celery stalks that are immersed in fresh water for several hours become stiff. Similar stalks left in a 0.15 M salt solution become limp. From this we can deduce that the fresh water__________.

Which of the following is true of osmosis?

Frye and Edidin labeled the membrane proteins of a mouse cell and a human cell with two different markers and fused the cells. In the accompanying diagram, these different markers are indicated with different colors. Based upon the results shown in the diagram, which of the following scientific questions below provided conclusive evidence through its investigation?

Suppose the cell shown in this figure is secreting insulin, a protein hormone, via exocytosis. Which statement most accurately describes why this mechanism of transport is ideal for insulin secretion?

What would be observed by live-cell fluorescence immediately after HIV entry if HIV is endocytosed first, and then later fuses with the endocytotic vesicle membrane?

In an HIV-infected cell producing HIV virus particles, the viral glycoprotein is expressed on the plasma membrane. How do the viral glycoproteins get to the plasma membrane? They are synthesized________.

A bacterium engulfed by a white blood cell through phagocytosis will be digested by enzymes contained in_______.

In receptor-mediated endocytosis, receptor molecules initially project to the outside of the cell. Where do they end up after endocytosis?

The difference between pinocytosis and receptor mediated endocytosis is that_______.

White blood cells engulf bacteria using________.

A sodium-potassium pump_________.

Which of the following membrane activities required energy from ATP?

The sodium-potassium pump is called an electrogenic pump because it_________.

The voltage across a membrane is called the_________.

Ions diffuse across membranes through specific ion channels down_______.

Which of the following would increase the electrochemical gradient across a membrane?

The solutions in the two arms of this U-tube are separated by a membrane that is permeable to water and glucose but not to sucrose. Refer to the figure. After the system reaches equilibrium, what changes are observed?

A patient was involved in a serious accident and lost a large quantity of blood. In an attempt to replenish body fluids, distilled water equal to the volume of blood lost is added to the blood directly via one of his veins. What will be the most probable result of this transfusion?