Enzymology - Part I
Test your knowledge and understanding ! May be Little tough to answer. . . . .
- 1.Select the Serine protease(s)
- A.
Chymotrypsin
- B.
Trypsin
- C.
Elastase
- D.
Thrombin
- E.
All of the above
- 2.Select the mismatched pair regarding enzymes and co-factor
- A.
Manganese - isocitrate dehydrogenase
- B.
Copper - cytochrome oxidase
- C.
Zinc - Carbonic anhydrase
- D.
Cobalt - vitamin B12
- E.
Selenium - glutathione peroxidase
- F.
Molybdenum - xanthine oxidase
- G.
All are correctly matched.
- 3.Which is an enzyme with low specificity ?
- A.
Glucokinase
- B.
Tyrosinase
- C.
Hexokinase
- D.
None of the above
- 4.False regarding Km
- A.
Km = concentration of substrate at ½ Vmax
- B.
Km is inversely proportional to the affinity
- C.
Km is increased in non-competitive inhibition.
- D.
Km is increased in competitive inhibition.
- 5.False regarding Lineweaver-Burk plot
- A.
1/Vo is plotted against 1/[S]
- B.
1/[S] is plotted against 1/Vo
- C.
Km and Vmax can be found.
- D.
Mechanism of action of enzyme inhibitors can be found
- 6.Chemical nature of enzyme
- A.
Proteins
- B.
RNA
- C.
Both
- D.
None
- 7.
In the graph shown below, increasing the substrate concentration does not increase the rate of reaction at a certain point because- A.
All of the enzymes are occupied by substrates
- B.
All of the enzymes have been denatured
- C.
Both are correct
- D.
None are correct
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