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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