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Biochemistry - Enzymes

Exercise : Enzymes - Section 1
  • Enzymes - Section 1
6.
The proteolysis rate enhancement by chymotrypsin (~1010 folds) corresponds to a reduction in activation energy of about
40 kJ/mol
49 kJ/mol
58 kJ/mol
88 kJ/mol
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Which of the following is false statement with regard to comparison between Serine and HIV proteases?
Both use nucleophilic attack to hydrolyze the peptide bond
Both require water to complete the catalytic cycle
Both forms an acyl-enzyme intermediate
Both show specificity for certain amino acid sequences
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
In the enzyme-catalyzed reaction shown below, what will be the effect on substances A, B, C, and D of inactivating the enzyme labeled E2?

A ---(E1)---> B ---(E2)---> C ---(E3)--->

A, B, C, and D will all still be produced
A, B, and C will still be produced, but not D
A and B will still be produced, but not C or D
A will still be produced, but not B, C, or D
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
The nucleophile in serine proteases is
Serine
water
both (a) and (b)
Asparagine
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
The role of Asp 102 and His 57 during trypsin catalysis is to
neutralize the charge on the other's side chain
keep the specificity pocket open
function as a proton shuttle
clamp the substrate into the active site
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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