The cytoplasmic membrane of both eukaryotes and prokaryotes functions to
A. form endoplasmic reticulum.
B. produce energy.
C.
regulate movement of molecules that enter and leave the cell.
D.
form lysosomes and Golgi apparatus.
A striking feature of Clostridium tetani that differentiates it from other pathogenic species of Clostridium is its ability to
A. produce a greenish pigment.
B. form spores.
C. form terminally located, spherical spores.
D. grow aerobically
Which is not true of the cytoplasmic membrane?
A. It defines the boundaries of the cell.
B. It is a semipermeable barrier.
C.
It consists mainly of a fixed, static, phospholipid bilayer.
D. It uses proteins as selective gates and sensors.
E. All of the choices are true.
Which is true of simple diffusion of water?
A. Water usually enters a cell and produces a tremendous osmotic pressure.
B. Water usually leaves the cell and produces negative osmotic pressure.
C. Water tends to enter and leave the cell equally, resulting in no pressure in the cell.
D. The diffusion ultimately relies on the selectively permeable nature of the cell membrane.
E. Water usually enters a cell and produces a tremendous osmotic pressure AND the diffusion ultimately relies on the selectively permeable nature of the cell membrane.
Which of the following virulence factors has been associated with Pseudomonas aeruginosa?
A.
Endotoxin A
B.
Exoenzyme S
C.
Pyogenic exotoxin
D.
Endoenzyme T
Quick Reply
