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Define the role of peptide linkage in the structure of proteins.

Important Questions on Biomolecules

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Chemistry>Organic Chemistry>Biomolecules>Proteins

The structure of protein that is unaffected by heating is :

EASY

Chemistry>Organic Chemistry>Biomolecules>Proteins

The correct sequence of amino acids present in the tripeptide given below is:
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Chemistry>Organic Chemistry>Biomolecules>Proteins

Stability of

α

- Helix structure of proteins depends upon

EASY

Chemistry>Organic Chemistry>Biomolecules>Proteins

Among the following compounds most basic amino acid is:

EASY

Chemistry>Organic Chemistry>Biomolecules>Proteins

What type of bonding helps in stabilising the -helix structure of proteins ?

EASY

Chemistry>Organic Chemistry>Biomolecules>Proteins

In a protein molecule various amino acids are linked together by:

EASY

Chemistry>Organic Chemistry>Biomolecules>Proteins

What is meant by primary structure of a protein?

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Chemistry>Organic Chemistry>Biomolecules>Proteins

Among the

α

-amino acid-threonine, tyrosine, methionine, arginine and tryptophan, those which contain an aromatic group in their side chain are

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Chemistry>Organic Chemistry>Biomolecules>Proteins

Assume a spherical mammalian cell has a diameter of 27 microns. If a polypeptide chain with alpha-helical conformation has to stretch across the cell, how many amino acids should it be comprised of?

HARD

Chemistry>Organic Chemistry>Biomolecules>Proteins

A protein has the amino acid sequence

Ala - Gly - Val - Gly - Leu - Ser

as a part of polypeptide chain. In

α

-Helix structure, the

- {NH}_{2}

group of which amino acid will form

H

-bond with the CO group of Alanine? What will happen to this hydrogen bond when the protein is denatured?

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Chemistry>Organic Chemistry>Biomolecules>Proteins

Which of the following tests cannot be used for identifying amino acids?

HARD

Chemistry>Organic Chemistry>Biomolecules>Proteins

A tripeptide is labelled as 'Gly- Ala- Phe' (One-letter code is

G - A - F) .

The correct structure of this tripeptide is:

HARD

Chemistry>Organic Chemistry>Biomolecules>Proteins

The correct structure of histidine in a strongly acidic solution

(pH = 2)

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Chemistry>Organic Chemistry>Biomolecules>Proteins

Given below are two statements:

Statement I: A protein is imagined as a line, the left end represented by first amino acid (C-terminal) and the right end represented by last amino acid (N-terminal).

Statement II: Adult human haemoglobin, consists of 4 subunits (two subunits of $α$ type and two subunits of $β$ type).

In the light of the above statements, choose the correct answer from the options given below:

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Chemistry>Organic Chemistry>Biomolecules>Proteins

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