The voltage across a membrane is called the ____
a. electrochemical gradient
b. turgor pressure
c. membrane potential
d. chemical gradient
e. electron potential
C
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Membrane proteins serve many functions. One of the functions is transportation of substances across the membrane. If a cell biologist placed cells into an environment in which a chemical has been added that blocks the function of only carrier proteins, the process that will be affected is
A. active transport. B. osmosis. C. simple diffusion. D. phagocytosis. E. pinocytosis.
Explain why the viral genome of the MS2 phage can be immediately translated. What type of genome must it have for this to be the case?
What will be an ideal response?
A nerve impulse travels times faster when it leaps between nodes of Ranvier than when it travels along an unmyelinated axon.
A. 5 B. 10 C. 20 D. 100 E. 50
If the mitosomes of Giardia contain no DNA, yet are descendants of what were once free-living organisms, then where are we likely to find the genes that encode their structures, and what accounts for their current location there?
A) plasmids; conjugation B) plasmids; transformation C) nucleus; horizontal gene transfer D) nucleus; S phase