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प्रश्न
Write the names and schematic representations of all the possible dipeptides formed from alanine, glycine and tyrosine.
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उत्तर
- Glycylglycine: Gly-Gly
- Alanylalanine: Ala-Ala
- Tyrosyltyrosine: Tyr-Tyr
- Glycylalanine: Gly-Ala
- Alanylglycine: Ala-Gly
- Glycyltyrosine: Gly-Tyr
- Tyrosylglycine: Tyr-Gly
- Tyrosylalanine: Tyr-Ala
- Alanyltyrosine: Ala-Tyr
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संबंधित प्रश्न
Select the most correct choice.
A disulphide link gives rise to the following structure of a protein.
Give scientific reasons:
α-Amino acids have high melting points compared to the corresponding amines or carboxylic acids of comparable molecular mass.
Draw a neat diagram for the following:
Zwitter ion
Draw a neat diagram for the following:
Secondary structure of protein
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.
\[\ce{H2N - CH2 - COOH + H2N - CH2 - CH2 - COOH ->[-H2O] ?}\]
Write types of proteins depending upon molecular shape.
Explain denaturation of proteins.
Write industrial application of enzyme catalysis.
Define α-amino acids.
Explain the primary structure of proteins.
From the following identify the INCORRECT match with respect to the different structures of proteins.
Nucleotide differs from a nucleoside as it has ______
Histones are involved in packaging of DNA into structural units called ______.
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.
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 ____________.
The optically inactive amino acid is ____________.
Which of the following contains keratin?
Which of the following is NOT a protein?
Proteins are ______ of amino acids.
Proteins are polypeptides with linear chains of i ______ linked by ii ______ bonds.
Complete the analogy and select the correct option.
α-helix structure : Keratin :: β-pleated sheet : ____________.
Which among the following amino acids has lowest molar mass?
The bacteriostatic antibiotic from the following is ______.
Which of the following amino acids has \[\ce{Me - S - CH2 - CH2 -}\] group in the side chain?
The side chain R in cysteine is ____________.
Which of the following is not a broad spectrum antibiotics?
The basic amino acid is ____________.
The number of proteins in an average human cell is over ______.
The most abundant cellular protein is ______.
A protein is a sequence of amino acids. The end of the polypeptide chain of -NH2 end and at -COOH end are respectively called ______.
An iron-containing red protein is ______
If side-chain group-R for amino acid is -CH2OH, identify the amino acid from following?
Identify basic amino acid from following.
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.
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, ____________.
Among the following L-serine is:
Which of the following amino acids is achiral?
Give the differences between the primary and secondary structure of proteins.
Write a short note on peptide bond.
Define enzymes.
Denaturation of proteins leads to loss of their biological activity by:
Which of the following amino acid is basic in nature?
The amino acid, which is basic in nature is ______.
Tertiary structure of protein is stabilised by ______.
Peptide and hydrogen bonds are present in the primary structure of the protein which is due to ______.
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 peptide bond.
Write the Zwitter ion structure of alanine.
Write a short note on peptide bond.
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?
In large proteins, peptide chains are much looped, twisted and folded back on themselves. The folded structure is due to the formation of ______ bonds.
