Exam 3: Cells: the Living Units

Which of the following describes the plasma membrane?

Lipid rafts, found in the cell outer membrane surface, are concentrating platforms for certain receptor molecules or for protein molecules needed for cell signaling..

Figure 3.1Using Figure 3.1, match the following: -Packages proteins for insertion in the cell membrane or for exocytosis.

Cholesterol helps to stabilize the cell membrane while decreasing the mobility of the phospholipids.

Figure 3.1Using Figure 3.1, match the following: -How are the products of free ribosomes different from membrane- bound ribosomes?

A red blood cell placed in pure water would .

Caveolae are closely associated with all of the following except .

Riboswitches are folded RNAs that act as switches to turn protein synthesis on or off in response to )

Passive membrane transport processes include _ .

Peroxisomes _.

A process by which large particles may be taken into the protection of the body by invaders like bacteria, or for disposing of old or dead cells is called phagocytosis.

In osmosis, movement of water occurs toward the solution with the lower solute concentration.

If cells are placed in a hypertonic solution containing a solute to which the membrane is impermeable, what could happen?

In their resting state, all body cells exhibit a resting membrane potential ranging from - 50 to about +50 millivolts.

In which stage of mitosis do the identical sets of chromosomes uncoil and resume their chromatin form?

Research shows that neurofibrillary tangles associated with the disintegration of microtubules are the primary cause of Alzheimer's disease. If microtubules disintegrate, what then might happen to brain cells?

Why can we say that a cell without a nucleus will ultimately die?

is the division of the cytoplasmic mass into two parts.

Briefly name the subphases of interphase and tell what they do.

Your patient has a respiratory disease that has literally paralyzed the cilia. Explain why this patient would be at an increased risk for a respiratory infection.