As the time passes during the nucleosome assembly then, which of the following fig. is correctly representing the different state of circular DNA

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#Question id: 371

#Unit 1. Molecules and their Interaction Relevant to Biology

How many milliliters of a 2.0 M solution of boric acid must be added to 600 mL of a solution of 10 mM sodium borate in order for the pH to be 9.45? (pKa of boric acid = 9.24)

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#Question id: 372

#Unit 1. Molecules and their Interaction Relevant to Biology

Carbon dioxide in the atmosphere dissolves with the raindrops. The pH of raindrops is ________.

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#Question id: 373

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the hydroxyl ion (OH-) concentration of a solution of pH 8?

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#Question id: 374

#Unit 1. Molecules and their Interaction Relevant to Biology

The pH of a sample of blood is 7.4, while gastric juice is pH 1.4.  The blood sample has:

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#Question id: 375

#Unit 1. Molecules and their Interaction Relevant to Biology

The aqueous solution with the lowest pH is:

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#Question id: 376

#Unit 1. Molecules and their Interaction Relevant to Biology

Phosphoric acid is tribasic, with pKa of 2.14, 6.86 and 12.4. The ionic form that predominates at pH 3.2 is