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

Subtopic:  Nucleic Acid | The DNA |
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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
Subtopic:  Nucleic Acid | The DNA |
 80%
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The pitch of DNA helix is:

1. 0.34 nm 2. 3.4 nm
3. 34 nm 4. 340 nm
Subtopic:  Nucleic Acid | The DNA |
 71%
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Almost all enzymes are:

1. Polysaccharides 2. Proteins
3. Nucleic acids 4. Lipids
Subtopic:  Enzymes |
 92%
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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
Subtopic:  Enzymes |
 83%
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Which of these can have catalytic activity?

1. RNA 2. DNA
3. Prostaglandins 4. Sterols
Subtopic:  Enzymes |
 83%
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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

Subtopic:  Enzymes | Factors Affecting Enzyme Catalysis Reaction |
 91%
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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

Subtopic:  Enzyme Catalysis | Factors Affecting Enzyme Catalysis Reaction |
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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

Subtopic:  Enzyme Catalysis |
 84%
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Low temperature:
1. Preserves enzyme in a temporary inactive state
2. Denatures the enzyme
3. Makes enzyme more active
4. Does not have any affect on enzyme activity

Subtopic:  Enzyme Catalysis | Factors Affecting Enzyme Catalysis Reaction |
 86%
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