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प्रश्न
Define α-amino acids.
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उत्तर
α-Amino acids are carboxylic acids having an amino (–NH2) group bonded to the α-carbon, that is, the carbon next to the carboxyl (–COOH) group.
संबंधित प्रश्न
Give scientific reasons:
On boiling egg albumin becomes opaque white.
Write the names and schematic representations of all the possible dipeptides formed from alanine, glycine and tyrosine.
Draw a neat diagram for the following:
Secondary structure of protein
Draw a neat diagram for the following:
Enzyme catalysis
The optically inactive α-amino acid among the following is _____________
The chemical nature of peptide bond in proteins is ____________
Write the number of chiral carbon atoms present in fructose.
Complete the following reaction.
\[\ce{H2N - CH2 - COOH + H2N - CH2 - CH2 - COOH ->[-H2O] ?}\]
Define peptide bond.
Write types of proteins depending upon molecular shape.
Explain denaturation of proteins.
Draw the structure of Haworth formula of sucrose.
Purine and pyrimidine bases are placed regularly along the DNA molecules at a distance of ______
Read the following statements and select the correct option.
- In quaternary structure, the peptide chains are much looped, twisted, and folded back on themselves due to formation of hydrogen bonds.
- When a protein has more than two polypeptide subunits their arrangement in space is called secondary structure.
Identify the option that correctly describes the amphoteric nature of proteins.
Identify 'P' and 'Q' in the following table.
| Proteins | Role |
| immunoglobulin | P |
| Q | Blood clotting |
Choose the WRONG statement from the following.
Identify (i) and (ii) and select the correct option.
i. Protein portion of the enzyme is called the ____________.
ii. Non-protein constituent binding to the enzyme is called as the ____________.
Which of the following contains keratin?
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 ______.
β-pleated sheets of polypeptide chains are present in ______.
The side chain R in cysteine is ____________.
The enzyme which converts maltose to glucose is ______.
Which of the following amino acid is an essential amino acid?
The most abundant cellular protein is ______.
Which of the following molecules from a zwitter ion?
Which of the following amino acids has –CH2OH group in its side chain?
Which among the following amino acids has the lowest molecular mass?
Which among the following is a globular protein?
Identify the side chain –R present in amino acid lysine.
Which among the following is basic amino acid?
In a protein, various amino acids linked together by ____________.
Among the following the achiral amino acid is:
In aqueous solution of amino acids mostly exists in, ____________.
Which of the following amino acids is achiral?
Write a short note on peptide bond.
Write the structure of all possible dipeptides which can be obtained from glycine and alanine.
Which of the following amino acid is basic in nature?
Which among the following enzymes hydrolysis starch?
Amino acids in a protein molecule, are linked by a peptide bond. Which of the following correctly shows the reaction of forming peptide bonds?
Peptide and hydrogen bonds are present in the primary structure of the protein which is due to ______.
The tightly bound non-proteinaceous organic compound in enzyme is ______.
Write a short note on peptide bond.
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 a short note on peptide bond.
Write the Zwitter ion structure of alanine.
Write a short note on a peptide bond.
Write the Zwitter ion structure of alanine.
Write a short note on peptide bond.
Write the Zwitter ion structure of alanine.
Write a short note on peptide bond.
Write a short note on peptide bond.
Given below are two statements.
Statement I- Most of the blood proteins are acidic proteins.
Statement II - Derived proteins are not found in nature.
In the light of above statements, Select the correct option given below.
Which from following is an essential amino acid?
Which from following amino acids contains heterocyclic ring at a side chain (R) group?
