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.

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Macromolecule chitin is

(a) nitrogen containing polysaccharide.

(b) phosphorus containing polysaccharide

(c) sulphur containing polysaccharide

(d) simple polysaccharide

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The essential chemical components of many coenzymes are

(a) Proteins

(b) Nucleic acids

(c) Carbohydrates

(d) Vitamins

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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

Category              Component

(a) Cholesterol       Guanin

(b) Amino acid       NH2

(c) Nucleotide        Adenine

(d) Nucleoside       Uracil

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Which one is the most abundant protein in the animal world?

(a) Trypsin                     (b) Haemoglobin

(c) Collagen                    (d) Insulin

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Which one out of A-D given below correctly represents the structural formula of the basic amino acid?

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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

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Which one of the following pairs is wrongly matched?

(a) Detergents - Lipase

(b) Alcohol - Nitrogenase

(c) Fruit juice - Pectinase

(d) Textile - Amylase

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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

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A competive inhibitor of succinic dehydrogenase is

(a) malonate                 (b) oxaloacetate

(c) α-ketoglutarate        (d) malate

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