| 1 |
The active site of an enzyme |
- A. Never changes
- B. Forms no chemical bond with substrate
- C. Determines by its structur ethe specificity of the enzyme
- D. Looks like a lump projecting from the surface of an enzyme.
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| 2 |
What can happen if an enzyme is exposed to temperature that is highr than its optimal temperature. |
- A. Enzyme activity rate will increase
- B. Enzyme's shape will change potentially reducing its activity
- C. Enzyme will speed up the reaction and remain stable
- D. Enzyme will become a substrate itself
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| 3 |
The biochemical reactions in which larger molecules are synthesized are called. |
- A. Catabolism
- B. Metabolism
- C. Anabolism
- D. Digestive rections
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| 4 |
Changes in pH can alter the active site by affecting the |
- A. Shape of substrate
- B. Ionization of amino acids
- C. Ionization of cofactor
- D. Ionizaation of co enzyme
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| 5 |
Enzyme pepsin in the stomach has an optimum pH of about |
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| 6 |
The biochemical reactions in which larger molecules are synthesized are called. |
- A. Anabolism
- B. Catabolism
- C. Metabolism
- D. Digestive reactions
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| 7 |
An enzyme works best at a pH of 7.4. It is places in an acidic solution with a pH of 4.0.How will this affect the enzyme. |
- A. The substrate will become inactive in an acidic environment
- B. the enzyme wil gain additional active sites
- C. The enzyme will catalyse reactions faster due to increased H ions
- D. The activ esite will be modified reducing substrate binding
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| 8 |
ionization of amino acids at the activ esite is affected by. |
- A. Change in pH
- B. Change in temperature
- C. Change in substrate conceration
- D. Change is tempeaure and substrate concentration
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| 9 |
Lock and key hypothesis of enzyme action supports that |
- A. Active sites are rigid
- B. Active sites are flexible
- C. Active site efficiency increases
- D. Active site can change its shape
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| 10 |
Which of the followig are not changed during the biochemical reactions. |
- A. Substrate
- B. Enzymes
- C. Products
- D. ES complex
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