MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Enzyme Technology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If Ka for acetic acid is 1.78*10-5, the pKa of acetic acid is _________ |
| A. | 0.475 |
| B. | 4.75 |
| C. | 2.5 |
| D. | 0.25 |
| Answer» C. 2.5 | |
| 2. |
The pH at which half the groups of a compound are ionized is referred to as _________ |
| A. | pK<sub>a</sub> |
| B. | pI |
| C. | I |
| D. | K<sub>m</sub> |
| Answer» B. pI | |
| 3. |
What is the rate of denaturation kd, if the half-life of an enzyme catalyzed reaction is 15.6 mins? |
| A. | 4.4*10<sup>-2</sup>/sec |
| B. | 0.4*10<sup>2</sup>/min |
| C. | 4.4*10<sup>-2</sup>/min |
| D. | 0.4*10<sup>2</sup>/sec |
| Answer» D. 0.4*10<sup>2</sup>/sec | |
| 4. |
If the rate of denaturation of enzyme Y is 1.5*10-4/min, then the half-life of enzyme Y is ______ mins. |
| A. | 0.462*10<sup>3</sup> |
| B. | 4.62*10<sup>3</sup> |
| C. | 46.2*10<sup>3</sup> |
| D. | 0.0462*10<sup>3</sup> |
| Answer» C. 46.2*10<sup>3</sup> | |
| 5. |
The equation (t_{1/2}= frac{0.693}{k_d} ) represents ___________ |
| A. | Arrhenius equation |
| B. | Lineweaver Burk equation |
| C. | Half-life |
| D. | Gibbs-Helmholtz equation |
| Answer» D. Gibbs-Helmholtz equation | |
| 6. |
For every, 1000 fold increase in pressure, the Km is _____________ |
| A. | reduced to half |
| B. | doubled |
| C. | reduced to zero |
| D. | increased by 10 folds |
| Answer» B. doubled | |
| 7. |
What does the equation, k = (Ae^{ frac{- G}{RT}} ) represent? |
| A. | Arrhenius equation |
| B. | Miachelis Menton equation |
| C. | Lineweaver Burk equation |
| D. | Half-life |
| Answer» B. Miachelis Menton equation | |
| 8. |
The rate of enzyme catalyzed reaction decreases with an increase in ionic strength if the charges are identical. |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Calculate the ionic strength of 0.2 M solution of Calcium chloride? |
| A. | 0.9 M |
| B. | 0.06 M |
| C. | 0.6 M |
| D. | 6.0 M |
| Answer» D. 6.0 M | |
| 10. |
The pH at which the net charge on the enzyme molecule is zero is called __________ |
| A. | pK<sub>a</sub> |
| B. | Half-life |
| C. | Isoelectric point |
| D. | K<sub>m</sub> |
| Answer» D. K<sub>m</sub> | |
| 11. |
Enzymes are amphoteric molecules. |
| A. | True |
| B. | False |
| Answer» B. False | |