Which of the following is responsible for the stability of secondary polypeptide?

(A)peptide bond

(B)Hydrogen bonding

(C)Di-sulphide bond

(D) Ionic bond

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How many of the following bonds is present in tertiary structure of protein

Hydrophobic Interaction, Hydrogen bonding, Di-sulphide bond, Ionic bond, peptide bond

(A)5

(B)4

(C)3

(D)2

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Majority of the enzymes and proteins exist in which type of structure of proteins?

(A)Primary

(B)Secondary

(C)Tertiary

(D)Quaternary

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Which of the following is the strongest bond in protein?

(A)peptide bond

(B)Hydrogen bonding

(C)Di-sulphide bond

(D) Ionic bond

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Quaternary structure of proteins are formed by

(A)primary structure of proteins

(B)Secondary structure of proteins

(C)Tertiary structure of proteins

(D)Quaternary structure of proteins

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Which of the following proteins exist in their quaternary structure

(A)Myoglobin

(B)Haemoglobin

(C)Globulin

(D)Both A and B

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How many heme groups are present in Haemoglobin

(A)2

(B)1

(C)4

(D)3

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How many heme groups are present in Myoglobin

(A)2

(B)1

(C)4

(D)3

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How many polypeptide subunits are present in Haemoglobin

(A)2

(B)1

(C)3

(D)None of these

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Which of the following subunits are present in adult Haemoglobin

(A)2α & 2β type subunits

(B)2α & 2µ type subunits

(C)2β & 2µ type subunits

(D)2α & 2α  type subunits

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