A typical fat molecule is made up of
(a) One glycerol and three fatty acid molecules
(b) One glycerol and one fatty acid molecule
(c) Three glycerol and three fatty acid molecules
(d) Three glycerol molecules and one fatty acid molecule
Which one of the following statement is incorrect ?
(a) A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor.
(b) In competitive inhibition the inhibitor molecule is not chemically changed by the enzyme.
(c) The competative inhibitor does not affect the rate of breakdown of the enzyme-substrate complex.
(d) The presence of the competitive inhibitor decreases the km of the enzyme for the substrate.
A phosphoglyceride is always made up of
(a) only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
(b) only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
(c) a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
(d) a saturated or unsaturated fatty acid esterified to a phosphate group, which is also attached to a glycerol molecule.
Macromolecule chitin is
(a) nitrogen containing polysaccharide.
(b) phosphorus containing polysaccharide
(c) sulphur containing polysaccharide
(d) simple polysaccharide
The essential chemical components of many coenzymes are
(b) Nucleic acids
Given below is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one blank component X in it
(a) Cholesterol Guanin
(b) Amino acid NH2
(c) Nucleotide Adenine
(d) Nucleoside Uracil
Which one is the most abundant protein in the animal world?
(a) Trypsin (b) Haemoglobin
(c) Collagen (d) Insulin
Which one out of A-D given below correctly represents the structural formula of the basic amino acid?
Which one of the following structural formulae of two organic compounds is correctly identified with its related function?
(a) A - triglyceride major - a source of energy
(b) A - Lecithin - a component of cell membrane
(c) B - Adenine - forms nucleotides of the nucleic acids
(d) Both b and c
Which one of the following pairs is wrongly matched?
(a) Detergents - Lipase
(b) Alcohol - Nitrogenase
(c) Fruit juice - Pectinase
(d) Textile - Amylase