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Protein are nitrogeneous organic compoun...

Protein are nitrogeneous organic compound having very high molecular mass. They are polyamides formed from `alpha`-amino acid. The bond formed between two amino acid is called peptide bond `-underset(O) underset(||)C-NH-`. The product obtainded by this peptide bond formation are called peptide and they may be divided as di, tri ,tetra, penta peptide.
Consider following statements concerning protein
1. All amino acids which are constituents of proteins of `alpha`-amino acid.
2.`alpha`-amino acids are all optically active and have L-configuration
3. An especially favourable conformation for the peptide linkage in protein is the `alpha`-helix arrangement.
4.`alpha`-amino acids are connected by ester linkage.
Which of the following statement are correct?

A

1 and 3

B

1 and 2

C

2 and 3

D

2,3 and 4

Text Solution

Verified by Experts

The correct Answer is:
A
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Protein are nitrogeneous organic compound having very high molecular mass. They are polyamides formed from alpha -amino acid. The bond formed between two amino acid is called peptide bond -underset(O) underset(||)C-NH- . The product obtainded by this peptide bond formation are called peptide and they may be divided as di, tri ,tetra, penta peptide. The given structure of amino acid will exist at which pH?

Protein are nitrogeneous organic compound having very high molecular mass. They are polyamides formed from alpha -amino acid. The bond formed between two amino acid is called peptide bond -underset(O) underset(||)C-NH- . The product obtainded by this peptide bond formation are called peptide and they may be divided as di, tri ,tetra, penta peptide. Which statement are correct about peptide bond? 1. -overset(O)overset(||)C-NH- group is planar. 2. C-N bond length in protein is longer than usual bond length of C-N bond. 3. C-N bond length in protein is samller than usual bond length of C-N bond

Protein amino acids are

In a protein, amino acids are linked by

Peptide bonds are formed between which group of amino acids?

A peptide bond is formed between