Chaperones mediate nucleosome assembly. From the list below, what must happen first?
A. The CAF-1 chaperone binds an H3-H4 dimer and deposits it onto the DNA strand.
B. H3 and H4 form heterotetramers.
C. The NAP-1 chaperone assembles two H2A-H2B heterodimers with a H3-H4 tetramer.
D. The CAF-1 chaperone binds an H2A-H2B dimer and deposits it onto the DNA strand.
B
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a. pineal b. pituitary c. thyroid d. adrenal e. pancreas
Which feature of cycads makes them similar to many angiosperms?
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Below are two statements. Which (if any) applies to the law of segregation? Which (if any) applies to the law of independent assortment?
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A) reticular activating center B) cerebellum C) primary motor area D) postcentral gyrus