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STATEMENT-1 : Primary structure of prote...

STATEMENT-1 : Primary structure of proteins is determined by amino acid sequence.
and
STATEMENT-2 Intramolecular hydrogen bonding between carbonyl group and `-overset(|)N-H` group is responsible for the folding of polypeptide chain.

A

Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1

B

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a corrèct explanation for Statement-1

C

Statement-1 is True, Statement-2 is False

D

Statement-1 is False, Statement-2 is True

Text Solution

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The correct Answer is:
B
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Statement-1 O-nitrophenol is steam volatile because of intramolecular hydrogen bonding Statement-2 It has high melting point because of intramolecular hydrogen bonding.

STATEMENT -I : Low molecualr weight carbonyl compounds are more soloble in water then the corresponding alkanes STATEMENT -2 : H- bonding between carbonyl oxygen and water makes carbonyl compounds more water soluble then hydrocarbon .

Knowledge Check

  • STATEMENT - 1 :Boiling point of ethanol is more than ethylene glycol. STATEMENT - 2 : Ethylene glycol forms intramolecular H-bonding.

    A
    Statement - 1 is true, Statement - 2 is Ture, Statement-2 is a correct explanation for Statement-1.
    B
    Statement -1 is True , Statement -2 is False.
    C
    Statement -1 is False , Statement -2 is True.
    D
    Statement -1 and Statement -2 both are False.

  • In alpha- helix secondary structure, hydrogen bonds lie between indie group of one amino

    A
    2nd amino acid
    B
    3rd amino acids
    C
    Fourth amino acid
    D
    Fifth amino acid.

  • During chain elongation, peptide bond is formed between carboxyl group of first and amino group of second amino acid by

    A
    Peptidyl transferase
    B
    DNA ligase
    C
    Taq polymerase
    D
    Helicase

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    In alpha -helix secondary structure, hydrogen bonds lie between amide group of one amino acid and carbonyl group of

    Proteins are high molecular mass complex biomolecules of amino acids. The important proteins required for our body are enzymes, hormones, antibodies, transport proteins, structural proteins, contractile proteins etc. Except for glycine, all alpha -amino acids have chiral carbon atom and have L-configuration. The amino acids exists as dipolar ion called zwitter ion, in which a proton goes from the carboxyl group to the amino group. A large number of alpha -amino acids are joined by peptide bonds forming polypeptides. The peptides having very large molecular mass (more than 10,000) are called proteins. The structure of proteins is described as primary structure giving sequence of linking of amino acids, secondary structure giving manner in which polypeptide chains are arranged and folded, tertiary structure giving folding, coiling or bonding polypeptide chains producing three dimensional structures and quaternary structure giving arrangement of sub-units in an aggregate protein meolecule. Which of the following statements is not correct?

    Proteins are high molecular mass complex biomolecules of amino acids. The important proteins required for our body are enzymes, hormones, antibodies, transport proteins, structural proteins, contractile proteins etc. Except for glycine, all alpha -amino acids have chiral carbon atom and have L-configuration. The amino acids exists as dipolar ion called zwitter ion, in which a proton goes from the carboxyl group to the amino group. A large number of alpha -amino acids are joined by peptide bonds forming polypeptides. The peptides having very large molecular mass (more than 10,000) are called proteins. The structure of proteins is described as primary structure giving sequence of linking of amino acids, secondary structure giving manner in which polypeptide chains are arranged and folded, tertiary structure giving folding, coiling or bonding polypeptide chains producing three dimensional structures and quaternary structure giving arrangement of sub-units in an aggregate protein meolecule. Which of the following alpha -amino acid does not form optical isomers?

    Proteins are high molecular mass complex biomolecules of amino acids. The important proteins required for our body are enzymes, hormones, antibodies, transport proteins, structural proteins, contractile proteins etc. Except for glycine, all alpha -amino acids have chiral carbon atom and have L-configuration. The amino acids exists as dipolar ion called zwitter ion, in which a proton goes from the carboxyl group to the amino group. A large number of alpha -amino acids are joined by peptide bonds forming polypeptides. The peptides having very large molecular mass (more than 10,000) are called proteins. The structure of proteins is described as primary structure giving sequence of linking of amino acids, secondary structure giving manner in which polypeptide chains are arranged and folded, tertiary structure giving folding, coiling or bonding polypeptide chains producing three dimensional structures and quaternary structure giving arrangement of sub-units in an aggregate protein meolecule. All proteins on hydrolysis give

    STATEMENT-1 : Glycine is an achiral amino acid. STATEMENT-2 : pH of alanine is less than 7 STATEMENT-3: Almost all proteins are polypeptides

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