Which one of the following statements is correct with reference to enzymes?
1. Apoenzyme = Holoenzyme + Coenzyme
2. Holoenzyme = Apoenzyme + Coenzyme
3. Coenzyme = Apoenzyme + Holoenzyme
4. Holoenzyme = Coenzyme + Co-factor
Which of the following are not polymeric?
1. | nucleic acids | 2. | proteins |
3. | polysaccharides | 4. | Lipids |
Cellulose, the most important constituent of plant cell wall, is made of
1. | Unbranched chain of glucose molecules linked by α 1, 4 glycosidic bond |
2. | Branched chain of glucose molecules linked by β 1, 4 glycosidic bond in straight chain and β 1, 6 glycosidic bond at the site of branching |
3. | Unbranched chain of glucose molecules linked by β 1, 4 glycosidic bond |
4. | Branched chain of glucose molecules linked by α 1, 6 glycosidic bond at the site of branching |
Which of the following bio-molecules is strictly not a polymer?
1. | Carbohydrates | 2. | Proteins |
3. | Fats | 4. | Nucleic acids |
Most of the polymerization reactions result from:
1. | Redox reactions | 2. | Dehydration synthesis |
3. | Hydrolysis | 4. | Isomerization |
The R group in a proteinaceous amino acid is hydroxymethyl. This amino acid:
1. is not an essential amino acid
2. is not genetically coded for
3. is involved in disulfide linkage
4. is acidic in nature
The given compound:
1. | is a storage product in archaea |
2. | is the source of energy in fungi |
3. | is present in the cell walls of gram negative bacteria |
4. | is a structural component of plasma membrane |
Identify the given nitrogenous base:
1. | Adenine | 2. | Guanine |
3. | Thymine | 4. | Cytosine |
Which of the following components is found in least amounts in an average cell?
1. | Carbohydrates | 2. | Fats |
3. | Nucleic acids | 4. | Proteins |
Most abundant protein in the whole of the biosphere is:
1. | Collagen | 2. | Cellulose |
3. | RuBisCO | 4. | Keratin |