Q. Assertion (A): Chimaerism is more common in induced mutation breeding than in somaclonal variation.

Reason (R): Mutagenic treatments often affect only a few cells in multicellular tissues.

Choose the correct option:

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#Question id: 558

#Biochemistry

In a plot of l/V against 1/[S] for an enzyme-catalyzed reaction, the presence of a competitive inhibitor will alter the:

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#Question id: 559

#Biochemistry

In competitive inhibition, an inhibitor:

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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: