Question from campbell biology chapter 16:
36) studies of nucleosomes have shown that histone...
Biology, 26.08.2019 18:30, sarahnd6907
Question from campbell biology chapter 16:
36) studies of nucleosomes have shown that histones (except h1) exist in each nucleosome as two kinds of tetramers: one of 2 h2a molecules and 2 h2b molecules, and the other as 2 h3 and 2 h4 molecules. which of the following is supported by this data?
a) dna can wind itself around either of the two kinds of tetramers.
b) the two types of tetramers associate to form an octamer.
c) dna has to associate with individual histones before they form tetramers.
d) only h2a can form associations with dna molecules.
e) the structure of h3 and h4 molecules is not basic like that of the other histones.
Answers: 1
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Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.
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