Q. No.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.
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 |
Which of the following organic compounds is the main constituent of Lecithin?
| 1. | Arachidonic acid | 2. | Phospholipid |
| 3. | Cholesterol | 4. | Phosphoprotein |
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 structure of protein organization is not disrupted during denaturation of a protein?
| 1. | Quaternary | 2. | Tertiary |
| 3. | Secondary | 4. | Primary |
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
In a typical cell, which of the following constitutes least % of the total cellular mass?
| 1. | Proteins | 2. | Nucleic acids |
| 3. | Carbohydrates | 4. | Lipids |
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Each step of ascent of a strand of DNA:
I. is represented by a pair of bases
II. the strand turns 360
III. the rise per base pair is 3.4 nm
1. Only II is correct
2. Only I and II are correct
3. only II and III are correct
4. I, II and III are correct
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Identify the incorrectly matched pair:
| 1. | Lecithin | Phospholipid |
| 2. | Aromatic amino acid | Threonine |
| 3. | Cytidine | Nucleoside |
| 4. | Trihydroxy propane | Glycerol |
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Identify the incorrect statement regarding enzyme action:
1. Formation of [Enzyme Substrate] complex is obligatory
2. Enzymes speed up a chemical reaction by lowering the requirement of activation energy
3. Substrate need not go through a transition state if the enzyme catalyzed reaction is endothermic
4. Enzymes are themselves not used up in the chemical reaction catalyzed by them
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