Cytochalasin D is a drug that prevents actin polymerization. A cell treated with cytochalasin D will still be able to _____
A) divide in two
B) contract muscle fibers
C) extend pseudopodia
D) move vesicles within a cell
D
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The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane
â€"more acidic outside the cell than inside the cell. Phosphate transport is an example of _____. A) passive diffusion B) facilitated diffusion C) active transport D) osmosis E) cotransport
Genetic maps are constructed by estimating the distances between linked genes based on the calculation of
____________________. Fill in the blank(s) with the appropriate word(s).
Cnidarians typically obtain food by:
A) forming cooperative arrangements with photosynthetic organisms. B) amoeboid-like engulfing of prey. C) stinging and pulling prey to the mouth with tentacles. D) filter feeding.
Some groups of chemical elements react similarly to one another. For example, the chemistries of sodium and of lithium are similar, as are the chemistries of chlorine and of iodine. These similarities in chemistry result when different elements have similar __________.
Fill in the blank(s) with the appropriate word(s).