Q. No.
Hydrolytic enzymes that act on low pH are called:
| 1. | Protease | 2. | α-Amylase |
| 3. | Hydrolases | 4. | Peroxidase |
Role of enzyme in reactions is to:
1. Decrease activation energy
2. Increase activation energy
3. Act as an inorganic catalyst
4. None of the above
Phospholipids are esters of glycerol with:
| 1. | Three carboxylic acid residues |
| 2. | Two carboxylic acid residues and one phosphate group |
| 3. | One carboxylic acid residue and two phosphate groups |
| 4. | Three phosphate groups |
The major portion of the dry weight of plants comprises of:
1. Nitrogen, phosphorus, and potassium
2. Calcium, magnesium, and sulphur
3. Carbon, nitrogen, and hydrogen
4. Carbon, hydrogen, and oxygen
Which protein is found in the maximum amount:
1. Catalase
2. Zinc carbonic anhydrase
3. Transferase
4. RUBISCO
Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by -
1. Base-sugar-OH
2. Base-sugar-phosphate
3. Sugar-phosphate
4. (Base-sugar-phosphate)n
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. | Non-competitive inhibitors often bind to the enzyme irreversibly |
| 3. | Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme |
| 4. | Non-competitive inhibition of an enzyme can be overcome by adding large amounts of substrate |
Which of the following is the simplest amino acid?
1. Alanine
2. Asparagine
3. Glycine
4. Tyrosine
Which of the following are not secondary metabolites in plants?
| 1. | Vinblastin, curcumin | 2. | Rubber, gums |
| 3. | Morphine, codeine | 4. | Amino acids, glucose |
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