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प्रश्न
Explain globular and fibrous proteins with example.
उत्तर
Globular proteins:
- Molecules of globular proteins have a spherical shape. This shape results from coiling around the polypeptide chain of the protein.
- Globular proteins are usually soluble in water.
For example: Insulin, egg albumin, serum albumin, legumelin (protein in pulses)
Fibrous proteins:
- Molecules of fibrous proteins have elongated rod-like shape. This shape is the result of holding the polypeptide chains of protein parallel to each other.
- Hydrogen bonds and disulfide bonds are responsible for this shape.
- Fibrous proteins are insoluble in water.
For example: Keratin (present in hair, nail, wool), myosin (protein of muscles).
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संबंधित प्रश्न
Draw a neat diagram for the following:
Secondary structure of protein
Write the structure of Zwitterion of alanine.
Define α-amino acids.
From the following identify the INCORRECT match with respect to the different structures of proteins.
Purine and pyrimidine bases are placed regularly along the DNA molecules at a distance of ______
Identify 'P' and 'Q' in the following table.
| Proteins | Role |
| immunoglobulin | P |
| Q | Blood clotting |
The optically inactive amino acid is ____________.
Which of the following is NOT a protein?
Complete the analogy and select the correct option.
α-helix structure : Keratin :: β-pleated sheet : ____________.
Identify the enzyme that catalyses the reaction of CO2 with water in huma body.
For the conversion of oxygen to ozone in the atmosphere, nitric oxide in gaseous phase acts as ______.
Which of the following amino acids has \[\ce{Me - S - CH2 - CH2 -}\] group in the side chain?
The amino acid having −CH3 as side chain is ____________.
The molecular weight of hemoglobin is ______ Daltons.
Identify basic amino acid from following.
Which of the following molecules from a zwitter ion?
Which among the following is a globular protein?
Identify the side chain –R present in amino acid lysine.
The central dogma of molecular genetics states that the genetic information flows from:
Amino acids in a protein molecule, are linked by a peptide bond. Which of the following correctly shows the reaction of forming peptide bonds?
Write a short note on peptide bond.
Write a short note on peptide bond.
Define the term Protein.
Write a short note on peptide bond.
Write the Zwitter ion structure of alanine.
Write a short note on peptide bond.
Short Answer Question.
Write the Zwitter ion structure of alanine.
