In protein structure the α-helix and βpleated sheets are example of (A) Primary structure (B) Secondary structure (C) Tertiary structure (D) Quaternary structure

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Answer :

Answer : B

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Description : In proteins the α-helix and β-pleated sheet are examples of (A) Primary structure (B) Secondary structure (C) Tertiary structure (D) Quaternary structure

Last Answer : Answer : B

Description : The α-Helix is a common form of (a) Primary structure (b) Tertiary structure (c) Secondary structure (d) None of these

Last Answer : Secondary structure

Description : The _______ structure of a protein is the sequence of amino acids. a. primary b. secondary c. tertiary d. quaternary

Last Answer : a. primary

Description : During denaturation of proteins, all of the following are disrupted except (A) Primary structure (B) Secondary structure (C) Tertiary structure (D) Quaternary structure

Last Answer : Answer : B

Description : Which of the following protein structures does “denaturation” destroy? (a) primary and secondary structures (b) secondary and tertiary structures (c) tertiary and quaternary structures (d) secondary, tertiary, and quaternary structures

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Description : The linear arrangement of amino acid units in proteins is called : (a) primary structure (b) secondary structure (c) tertiary structure (d) quaternary structure

Last Answer : primary structure

Description : Which of the following may characterize the “secondary structure” of proteins? (a) conformation of the protein backbone (b) α-Helix (c) parallel β-pleated sheet (d) all of the above

Last Answer : all of the above

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Last Answer : Primary

Description : The primary structure of a protein refers to : (a) whether the protein is fibrous or globular (b) the amino acid sequence in the polypeptide chain (c) the orientation of the amino acid side chains in space (d) the presence or absence of an α-helix

Last Answer : the amino acid sequence in the polypeptide chain

Description : Protein present in hemoglobin has the structure known as (A) Primary (B) Secondary (C) Tertiary (D) Quarternary

Last Answer : Answer : D

Description : Denaturation refers to the loss of the ______ structure of a ______ molecule. a. primary; carbohydrate b. molecular; fat c. secondary; starch d. tertiary; protein

Last Answer : d. tertiary; protein

Description : Which are the forces that maintain the second- ary, tertiary and quaternary structures of a pro- tein?

Last Answer : Hydrogen bonds, Electrostatic bonds, Van der Waalís forces and Hydrophobic bonds.

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Last Answer : Answer : B

Description : Which of the following structures can polypeptides have? (a) primary structure (b) secondary structure (c) tertiary structure (d) all of the these

Last Answer : all of the these

Description : Denaturation of proteins involves breakdown of (A) Secondary structure(B) Tertiary structure (C) Quarternary structure(D) All of these

Last Answer : Answer : D

Description : The hydrogen bonds in the secondary and tertiary structure of proteins are directly attacked by (A) Salts (B) Alkalies (C) Detergents (D) All of these

Last Answer : Answer : B

Description : The products received by exploiting natural resources come under which one of the following sectors? (a) Quaternary (b) Tertiary

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Description : What bonds hold together the Quaternary structure of protein? -Biology

Last Answer : answer:

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Description : Which of the following is the quaternary structure of proteins concerned with? (a) sequence of amino acids in the peptide chain (b) description of the way the peptide chains are arranged with ... (c) location of the disulfide bridges in the peptide chain (d) conformation of the protein backbone

Last Answer : description of the way the peptide chains are arranged with respect to each other

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Last Answer : (B) Hemoglobin

Description : In many proteins the hydrogen bonding produces a regular coiled arrangement which is called as (A) β-Helix (B) α-Helix (C) Both (A) and (B) (D) Spiral

Last Answer : Answer : B

Description : α-helix is stabilized by (A) Hydrogen bonds (B) Disulphide bonds (C) Salt bonds (D) Non-polar bonds

Last Answer : Answer : A

Description : α-helix is disrupted by certain amino acids like (A) Proline (B) Arginine (C) Histidine (D) Lysine

Last Answer : Answer : A

Description : The distance travelled per turn of α-helix in nm is (A) 0.34 (B) 0.44 (C) 0.54 (D) 0.64

Last Answer : Answer : C

Description : Each turn of α-helix contains the number of amino acids (A) 2.8 (B) 3.2 (C) 3.4 (D) 3.6

Last Answer : Answer : D

Description : In many proteins the hydrogen bonding produces a regular coiled arrangement called (A) α-helix (B) β-helix (C) Both (A) and (B) (D) None of these

Last Answer : Answer : A

Description : α-Helix is formed by (A) Hydrogen bonds (B) Hydrophobic bonds (C) Electrostatic bonds (D) Disulphide bonds

Last Answer : Answer : A

Description : An amino acid that does not take part in α helix formation is (A) Histidine (B) Tyrosine (C) Proline (D) Tryptophan

Last Answer : Answer : C

Description : Both α-helix and β-pleated sheet conformation of proteins were proposed by (A) Watson and Crick (B) Pauling and Corey (C) Waugh and King (D) Y.S.Rao

Last Answer : Answer : B

Description : At the lowest energy level α-helix of polypeptide chain is stabilised (A) By hydrogen bonds formed between the H of peptide N and the carbonyl O of the residue (B) Disulphide bonds (C) Non polar bonds (D) Ester bonds

Last Answer : Answer : A

Description : Along the α-helix each amino acid residue advances in nm by (A) 0.15 (B) 0.10 (C) 0.12 (D) 0.20

Last Answer : Answer : A

Description : Each turn of α-helix contains the amino acid residues (number): (A) 3.6 (B) 3.0 (C) 4.2 (D) 4.5

Last Answer : Answer : A

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Last Answer : Answer : D

Description : What is meant by tertiary structure of a protein?

Last Answer : The tertiary structure denotes three dimensional structure of the whole protein. It defines the steric relationship of amino acids which are far apart from each other in the linear sequence.

Description : In quaternary structure, subunits are linked by (A) Peptide bonds (B) Disulphide bonds (C) Covalent bonds (D) Non-covalent bonds

Last Answer : Answer : D

Description : What is meant by quaternary structure of a pro- tein?

Last Answer : Certain polypeptides will aggregate to form one functional protein. This is referred to as the qua- ternary structure.

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Last Answer : Give 3 methods to distinguish primary amine from secondary and tertiary.

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Last Answer : Need answer