A. DNA is wrapped 1.67 times around the histone octamer.

B. The structure of the DNA is altered so that it has an increased number of base pairs/turn in the middle, but a decreased number at the ends.

C. 0.6 negative turns of DNA are absorbed by the change in bp/turn from 10.5 in solution 

D. 10.2 bp/turn on the nucleosomal surface is linking-number paradox.

Find true and false

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#Question id: 4700

#Unit 11. Evolution and Behavior

Which of the following is not an observation or inference on which natural selection is based?

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#Question id: 15748

#Unit 5. Developmental Biology

In Drosophila, if there is four X chromosome and three sets of autosomes then the fly is:

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#Question id: 12980

#Unit 10. Ecological Principles

The following questions refer to Figure which depicts the age structure of three populations.

Which population is in the process of decreasing?

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#Question id: 31111

#Unit 2. Cellular Organization

Arp2/3 needs to be activated by interacting with a nucleation promoting factor (NPF). Although there are many different NPFs, The major NPF family is characterized by the presence of a region called:

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#Question id: 33983

#Unit 2. Cellular Organization

Which of the protein hold heterochromatin region attached to nuclear wall