In animal cells microtubules grow from which structure?
A. origination centers in the plasma membrane
B. outer membrane of the nuclear envelope
C. centrosomes containing centrioles
D. dimerization centers located throughout the cytosol
E. the tips of the chromosomes
C. centrosomes containing centrioles
You might also like to view...
Why is morphological convergence not a good explanation for vertebrate forelimbs? What will be an ideal response?
Genetic information carried by a(n) __________
directs the synthesis of a __________ chain during translation. Fill in the blank(s) with the appropriate word(s).
Cells of the outer surface of a sponge obtain nutrients
by a. absorbing food that diffuses from the central cavity. b. capturing food in their microvilli. c. absorbing food distributed by amoeboid cells. d. phagocytosing bacteria and other small food items. e. poisoning small fish that contact them
During the urination reflex, voluntary control is directed at the ____
a. bladder b. external urethral sphincter c. internal urethral sphincter d. internal ureter sphincter e. renal cortex