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#Question id: 4718


All the following statements about destruction of cyclins are true, except:

#Section 3: Genetics, Cellular and Molecular Biology
  1. Destruction is carried out by proteasomes.

  2. Destruction is preceded by polyubiquitination.

  3. Ubiquitination occurs at specific sites on target molecules.

  4. Ubiquitin targets Cdks.


Answer:- Option(s): 4


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#Question id: 602

#Section 2: General Biology

An inhibitor binds to a site other than the active site of the enzyme. Which statement below correlates with this observation?

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#Question id: 603

#Section 2: General Biology

Nonclassical competitive inhibition involves ________.

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#Question id: 604

#Section 2: General Biology

An enzyme is irreversibly inhibited by diisopropylfluorophosphate (DFP). What does this show?

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#Question id: 605

#Section 2: General Biology

Which statement is false about allosteric regulation?

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#Question id: 606

#Section 2: General Biology

Which statement is false about regulatory enzymes that are controlled allosterically?

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#Question id: 607

#Section 2: General Biology

In E. coli ________ is an activator and ________ is a negative allosteric modulator of the enzyme phosphofructokinase-1. 

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