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#Question id: 1439


Indirect-acting carcinogens are those that:

#Life Sciences
  1. chemically react with nitrogen and oxygen atoms in DNA.

  2. can modify bases in DNA so as to distort the normal pattern of base pairing.

  3. are mainly reactive electrophiles.

  4. generally unreactive, often water-insoluble compounds that can act as potent cancer inducers only after the introduction of electrophilic centers.


Answer:- Option(s): 4


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#Question id: 560

#Biochemistry

Vmax for an enzyme-catalyzed reaction:

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#Question id: 561

#Biochemistry

Enzyme X exhibits maximum activity at pH = 6.9.  X shows a fairly sharp decrease in its activity when the pH goes much lower than 6.4.  One likely interpretation of this pH activity is that:

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#Question id: 562

#Biochemistry

Phenyl-methane-sulfonyl-fluoride (PMSF) inactivates serine proteases by binding covalently to the catalytic serine residue at the active site; this enzyme-inhibitor bond is not cleaved by the enzyme.  This is an example of what kind of inhibition?

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#Question id: 564

#Biochemistry

A good transition-state analog:

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#Question id: 565

#Biochemistry

A transition-state analog:

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#Question id: 566

#Biochemistry

The role of the metal ion (Mg2+) in catalysis by enolase is to

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