Nucleosome DNA wraps around the histone protein 1.65 times, so create a writhe of –1.65 and so DLk should be -1.65. But when the change in linking number associated with each nucleosome was measured, the number was lower than this, approximately –1.2 for each nucleosome added. This discrepancy is referred to as the 

TLS Online TPP Program

#Question id: 3966

#Unit 3. Fundamental Processes

You are studying a mutant protein that has a half-life of several weeks. The normal, wild-type version has a half-life of only a few minutes. What feature would you look for to account for the difference in half-life of your mutant compared to the wild-type?

TLS Online TPP Program

#Question id: 11624

#Unit 8. Inheritance Biology

The effect of gene interaction is that one gene masks (hides) the effect of another gene at a different locus, a phenomenon known as

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#Question id: 1506

#Unit 4. Cell Communication and Cell Signaling

An oncogene codes for a growth factor receptor that is constitutively active. Of the following statements about a culture of cells expressing this gene, which would you expect to be true?

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#Question id: 12211

#Unit 7. System Physiology – Animal

A 57-year-old man is admitted as an emergency for upper GI bleeding. Endoscopy reveals multiple ulcers in the duodenum. Serum gastrin levels are eight-fold higher compared to normal. Zollinger-Ellison syndrome (ZES, gastrinoma) is suspected. Administration of which of the following substances is useful in confirming the diagnosis?

TLS Online TPP Program

#Question id: 26368

#Unit 3. Fundamental Processes

shorter the doubling time indicates