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TLS Online TPP Program

#Question id: 40234

Assertion (A): In the absence of beta-mercaptoethanol, a multimeric protein linked by disulfide bridges will migrate as a single large band.

Reason (R): beta-mercaptoethanol acts by oxidizing the thiol groups of cysteine residues to form stable covalent bonds.

#Applied Microbiology
  1. Both (A) and (R) are true, and (R) is the correct explanation of (A).
  2. Both (A) and (R) are true, but (R) is NOT the correct explanation of (A).
  3. (A) is true, but (R) is false
  4. (A) is false, but (R) is true.
More Questions
TLS Online TPP Program

#Question id: 559

#Biochemistry

In competitive inhibition, an inhibitor:
TLS Online TPP Program

#Question id: 560

#Biochemistry

Vmax for an enzyme-catalyzed reaction:
TLS Online TPP Program

#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:
TLS Online TPP Program

#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?
TLS Online TPP Program

#Question id: 564

#Biochemistry

A good transition-state analog:
TLS Online TPP Program

#Question id: 565

#Biochemistry

A transition-state analog: