Sugars are technically called carbohydrates, referring to the fact that their formulae are only multiples of C(H2O). Hexose therefore has six carbons, twelve hydrogen and six oxygen atoms. Glucose is a hexose. Choose from among the following another hexose.
1. | Fructose | 2. | Erythrose |
3. | Ribulose | 4. | Ribose |
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When we homogenize any tissues in an acid the acid soluble pool represents
1. | Cytoplasm | 2. | Cell membrane |
3. | Nucleus | 4. | Mitochondria |
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What level of protein organization structure explains the 3-D shape of an enzyme?
1. primary structure | 2. tertiary structure |
3. secondary structure | 4. quaternary structure |
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The graph shown below shows the effect of a certain factor on the rate of a reaction catalyzed by an enzyme. The X-axis would show the said factor and that will be:
1. substrate concentration | 2. pH |
3. enzyme concentration | 4. temperature |
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If an active-site directed inhibitor is present in the medium, the curve that will represent the progress of the chemical reaction will be shown by the letter:
1. D | 2. C |
3. A | 4. B |
A change in an amino acid located distantly from the active site of an enzyme can affect the specificity of the enzyme towards its substrate by:
1. | making the enzyme unstable |
2. | cause a relocation of the enzyme within a cell |
3. | changing the shape of the protein |
4. | changing the optimum pH and temperature values for the enzyme |
An amino acid that is negative charged amongst the following will be:
1. Glutamic acid | 2. Lysine |
3. Arginine | 4. Histidine |
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The metal ion that acts as a co-factor for both alcohol dehydrogenase and carbonic anhydrase is:
1. | Magnesium | 2. | Iron |
3. | Zinc | 4. | Nickel |
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The living state can be best described as a:
1. non equilibrium steady state
2. non equilibrium non steady state
3. equilibrium non steady state
4. equilibrium steady state
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The blood concentration of glucose in a normal healthy individual is:
1. 3.5 – 4.0 mM | 2. 4.0 – 4.5 mM |
3. 4.2 – 6.1 mM | 4. 5.0 – 5.5 mM |
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