Ca2+ is released into the cytosol from the ER lumen through the operation of____

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#Question id: 33907

#Unit 2. Cellular Organization

A circular DNA molecule with 580,070 bp. Calculate the molecular weight and contour length (when relaxed) of this molecule. What is Lko for the Mycoplasma chromosome? If σ=-  0.06, what is Lk?

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#Question id: 33908

#Unit 2. Cellular Organization

How is the linking number altered if one DNA strand is broken

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#Question id: 33909

#Unit 2. Cellular Organization

What is the Lk of a 5,000 bp circular duplex DNA molecule with a nick in one strand?

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#Question id: 33910

#Unit 2. Cellular Organization

What is the Lk of a 5,000 bp circular duplex DNA molecule after eight enzymatic turnovers by a single molecule of DNA gyrase in the presence of ATP?

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#Question id: 33911

#Unit 2. Cellular Organization

What is the Lk of a 5,000 bp circular duplex DNA molecule after eight enzymatic turnovers by a single molecule of DNA gyrase in the presence of ATP followed by 8 enzymatic turnovers by a single molecule of bacterial type I topoisomerase

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#Question id: 33912

#Unit 2. Cellular Organization

A. When a DNA molecule is negatively supercoiled, it is underwound. 

B. Any structural change involving DNA strand separation becomes more likely in negatively supercoiled DNA. 

C. Negative supercoiling makes establishment of left-handed Z-DNA in a segment of DNA 

D. The formation of plectonemic or solenoidal supercoils is favored as a means of negative supercoiling.

Find true and false