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
Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
(a) Thymine, Uracil - Pyrimidines
(b) Uracil, Cytosine - Pyrimidines
(c) Guanine, Adenine - Purines
(d) Adenine, Thymine - Purines
A competive inhibitor of succinic dehydrogenase is
(a) malonate (b) oxaloacetate
(c) -ketoglutarate (d) malate
An organic substance bound to an enzyme and essential for its activity is called:
(a) coenzyme (b) holoenzyme
(c) apoenzyme (d) isoenzyme