Statement I ; All proteins are poly peptidesStatement II ; All poly peptides are proteins

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Statements I and II are correct

Statement I is correct and statement II is incorrect

Statement I is incorrect and statement II is correct

Statements I and II are incorrect

answer is B.

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Detailed Solution

Peptide bond formation;-COOH+H2N-→-H2O-CO-NH-peptide linkage;Condensation of α-amino acids involves loss of water molecules ; -OH from -COOH and -H from -NH2 lose as water;Number of peptide linkages= n-1 (n=number of amino acid residues)Thus condensation ofa) two amino acids(one peptide bond) gives a dipeptideb) three amino acids(two peptide bonds) gives a tripeptidec) 2-10 amino acids gives oligo peptidesd) >10 amino acids gives a poly peptidese) If the molecular weight of a poly peptide is equal to greater than 10,000u containing a minimum of 100 amino acid residues, it is a protein;f) Thus all proteins are poly peptides but the reverse is not always true

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