Q. No.Which of the following statements regarding enzyme inhibition is correct?
1. Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein
2. Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme
3. Non-competitive inhibition of an enzyme can be overcome by adding large amounts of substrate
4. Non-competitive inhibitors often bind to the enzyme irreversibly
1. Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein
2. Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme
3. Non-competitive inhibition of an enzyme can be overcome by adding large amounts of substrate
4. Non-competitive inhibitors often bind to the enzyme irreversibly
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Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these
1. help in regulating metabolism
2. are exclusively synthesized in the body of a living organism
3. are conjugated proteins
4. enhance oxidative metabolism
The catalytic efficiency of two different enzymes can be compared by the
1. formation of the product
2. pH optimum value
3. Km value
4. molecular size of the enzyme
Telomerase is an enzyme which is a
1. repetitive DNA
2. RNA
3. simple protein
4. ribonucleoprotein
An organic substance bound to an enzyme and essential for its activity is called
1. holoenzyme
2. apoenzyme
3. isoenzyme
4. coenzyme
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An enzyme that can stimulate germination of barley seeds is
1. α-amylase
2. lipase
3. protease
4. invertase
Antibodies in our body are complex
1. Steroids
2. prostaglandins
3. Glycoproteins
4. Lipoproteins
Antiparallel strands of a DNA molecule means that
| 1. | the phosphate groups of two DNA strands, at their ends, share the same position |
| 2. | the phosphate groups at the start of two DNA strands are in opposite position (pole) |
| 3. | one strand turns clockwise |
| 4. | one strand turns anti-clockwise |
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One turn of the helix in a B-form DNA is approximately of the length
| 1. | 0.34 nm | 2. | 3.4 nm |
| 3. | 2 nm | 4. | 20 nm |
The two polynucleotide chains in DNA are
1. parallel
2. discontinuous
3. antiparallel
4. semi - conservative
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