Q. No.The double helix model of DNA by Watson and Crick exhibits its:
1. Primary structure
2. Secondary structure
3. Tertiary structure
4. Quaternary structure
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The strands of the DNA double helix are:
| 1. identical | 2. coiled around each other |
| 3. parallel to each other | 4. complementary to each other |
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At each step of ascent, the helical strand of DNA turns
| 1. 36 degree | 2. 34 degree |
| 3. 20 degree | 4. 180 degree |
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In the absence of carbonic anhydrase in the human body, the reaction between carbon dioxide and water leading to the formation of carbonic acid:
| 1. Will not occur | 2. Will slow down considerably |
| 3. Will get faster | 4. Will remain unaltered |
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Enzymes speed up the chemical reactions by:
1. Getting used up in the reaction
2. Formation of different products
3. Converting endothermic reactions to exothermic
4. Lowering activation energy
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The substrate concentration at which the enzyme catalyzed reaction achieves ½ Vmax is its ____ value.
| 1. Km | 2. Kcat |
| 3. pKa | 4. Q10 |
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In general, with every 10oC rise in the temperature [in the range 0oC to 40oC], the rate of enzyme catalyzed reaction:
1. Becomes half
2. Gets doubled
3. Remains same
4. There is no such correlation in general
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