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 |
Enzymes, vitamins, and hormones can be classified into a single category of biological chemicals because all of these:
1. | Are exclusively synthesized in the body of a living organism as at present |
2. | enhance oxidative metabolism |
3. | Are conjugated proteins |
4. | Help in regulating metabolism |
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
The catalytic efficiency of two different enzymes can be compared by the:
1. The Km value
2. The pH optimum value
3. Molecular size of the enzyme
4. Formation of the product
Carbohydrates, the most abundant biomolecules on earth, are produced by:
1. Some bacteria, algae, and green plant cells
2. All bacteria, fungi, and algae
3. Fungi, algae, and green plants cells
4. Viruses, fungi, and bacteria
True statement for cellulose molecule:
1. β–1–4 linkage, unbranched
2. β–1–4 linkage, branched
3. α–1–4 linkage, branched
4. β–1–6 linkage, unbranched
In which one of the following enzymes, is copper necessarily associated as an activator:
1. Tryptophanase
2. Lactic dehydrogenase
3. Tyrosinase
4. Carbonic anhydrase
Pantothenic acid & Biotin are associated with:
1. Vitamin D
2. Vitamin B complex
3. Vitamin K
4. Vitamin E
Which protein is found in the maximum amount:
1. Catalase
2. Zinc carbonic anhydrase
3. Transferase
4. RUBISCO
The secondary structure of protein, which is attached to lipid layer and lining the pores of cell membrane will be:
1. α-Helix
2. β-Strand
3. β-Chain
4. Random