The reducing end of the glycogen molecule:
1. is the end of the molecule containing a free carbon number one on glucose
2. are the end of the molecule other than containing a free carbon number one on glucose
3. are the ends of the alpha (1-6) branches
4. glycogen does not have a reducing end
Which structure of protein organization is not disrupted during denaturation of a protein?
1. | Quaternary | 2. | Tertiary |
3. | Secondary | 4. | Primary |
The number of peptide bonds in a protein molecule made of 120 amino acids will be:
1. | 60 | 2. | 119 |
3. | 120 | 4. | 240 |
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Which of the following organic compounds is the main constituent of Lecithin?
1. | Arachidonic acid | 2. | Phospholipid |
3. | Cholesterol | 4. | Phosphoprotein |
Prosthetic groups differ from co-enzymes in that
1. they require metal ions for their activity.
2. they (prosthetic groups) are tightly bound to apoenzymes.
3. their association with apoenzymes is transient.
4. they can serve as co-factors in a number of enzyme-catalyzed reactions.
Identify the substances having a glycosidic bond and peptide bond, respectively in their structure:
1. | Glycerol, trypsin | 2. | Cellulose, lecithin |
3. | Inulin, insulin | 4. | Chitin, cholesterol |
Enzymes are biochemical catalysts that:
1. can change the equilibrium position of the reaction it catalyses by lowering the energy of activation of that reaction.
2. can lower the energy of activation of the reaction it catalyses by increasing the molecular collisions between the molecules.
3. lower the free energy difference between substrate(s) and product(s) but it cannot change the equilibrium position of the reaction it catalyses.
4. cannot change the equilibrium position of the reaction it catalyses but it lowers the energy of activation of that reaction.
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Which of the following is not an example of dehydration synthesis in the structure of a biomolecule?
1. linking of individual monosaccharides in a polysaccharide
2. nitrogenous base pairing in a double stranded DNA helix
3. synthesis of triglycerides from fatty acids and glycerol
4. formation of the primary structure of a polypeptide
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Identify the zwitter ion configuration of alanine:
1. | 2. | ||
3. | 4. |
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All the following are examples of competitive enzyme inhibition except:
1. Sulfa drugs used as antibacterial agents
2. Ethyl alcohol used in methyl alcohol poisoning
3. Malonate inhibiting succinic dehydrogenase enzyme
4. Glucose 6 phosphate inhibiting hexokinase in brain