Peptide Formation

Q. The bonds present between amino acids of a polypeptide chain are called

1. peptide bonds
2. metallic bonds
3. glycosidic bonds
4. phosphodiester bonds

Q.

How does the formation of peptide bond take place?

Q. If mass percentage of iron in an enzyme is 0.4, then the minimum molecular weight of an enzyme Will be (atomic weight of Fe= 56) .

Q. Primary precursor of IAA is

1. lucine
2. phenylalanine
3. tyrosine
4. tryptophan

Q. Which of the following biomolecules contain nitrogen?

1. Proteins
2. Carbohydrates
3. Fats
4. None of these

Q.

What is a pentapeptide?

Q. In a polypeptide, the carboxyl group of one amino acid is bound to the amino group of the next amino acid by .

1. peptide bond
2. glycosidic bond
3. disulfide bond
4. H-bond

Q. Illustrate a glycosidic, peptide and phosphodiester bond.

Q.

The chemical reaction between an amino group and the carboxylic group is called a ___.

1. Decondensation

2. Peptide bond formation

3. Condensation (dehydration) reaction

4. Oxidation

Q. Proteins on hydrolysis, break down into __________.

1. Dicarboxylic acids
2. Hydroxy acids
3. Amino acids
4. Aromatic acids

Q. The peptide linkage is :

1. ether
2. anhydride
3. ester
4. amide

Q. Define peptide linkage.

Q. Define glycosidic, peptide and a phosphodiester bond.

Q. What is meant by peptide linkage and biocatalysts?

Q. What is peptide linkage? How is dipeptide formed?

Q. Illustrate a glycosidic, peptide and a phosphodiester bond. What is meant by the tertiary structure of proteins?

Q. Define the following as related to proteins :
(i) Peptide linkage
(ii) Primary structure
(iii) Denaturation

Q.

Peptide bond between two amino acids is formed by __(i)__ reaction which releases __(ii)__ and forms __(iii)__.

1. Esterification H₂O Polypeptides

2. Phosphorylation O₂ Polypeptides

3. Hybridisation O₂ Polypeptides

4. Condensation H₂O Polypeptides

Q. Calculate the bond order of ClO3 using resonance concept(caution:this is clo3 not clo3-)

Q. Peptide bond is formed between two amino acids through

1. Addition of water
2. Loss of water
3. Decarboxylation
4. Deamination

Q. A bond formed between carboxyl group of one amino acid and amino group of adjacent amino acid, is called

1. peptide bond
2. hydrogen bond
3. covalent bond
4. all of these

Q. A dipeptide has two peptide bonds.

1. True
2. False

Q. What is a peptide bond?

Q. Write the name of linkage joining two amino acids.

Q. Proteins on hydrolysis, break down into __________.

1. Dicarboxylic acids
2. Hydroxy acids
3. Amino acids
4. Aromatic acids

Q. Carbohydrates are broadly divided into monosaccharides, oligosaccharides and polysaccharides.
(a) Write one example each of monosaccharide and oligosaccharide.
(b) (i) Write any one method for the preparation of glucose.
(ii) What is peptide linkage?

Q. Which of the following characteristics is not related to the amphoteric nature of amino acids?

1. Maintenance of pH of body fluids
2. Zwitter ion formation
3. Response of amino acids to electric field
4. Formation of peptide linkage

Q. Which one of the following is a modified amino acid?

1. Epinephrine
2. Progesterone
3. Prostaglandin
4. Estrogen

Q.

Kindly provide me the information that which protease cut peptide bond after which amino acid .

Q. The bacteria grown in the medium containing $S^{35}$ as a sole source of sulphur show its incorporation into

1. DNA
2. Protein
3. RNA
4. None of the above