Differentiate between globular and fibrous proteins.
(N/A)
| Fibrous protein | Globular protein |
|---|---|
| $1.$ It is a fibre-like structure formed by the polypeptide chain. These proteins are held together by strong hydrogen and disulphide bonds. | $1.$ The polypeptide chain in this protein is folded around itself,giving rise to a spherical structure. |
| $2.$ It is usually insoluble in water. | $2.$ It is usually soluble in water. |
| $3.$ Fibrous proteins are usually used for structural purposes. For example,keratin is present in nails and hair; collagen in tendons; and myosin in muscles. | $3.$ All enzymes are globular proteins. Some hormones such as insulin are also globular proteins. |
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Proteins are hydrolysed by enzymes into
Medium
View SolutionFor $\alpha$-amino acids having the structure $R-CH(NH_2)-CO_2H$,which of the following statements are true?
$(a)$ Water solubility is maximum at a $pH$ when concentrations of anions and cations are equal.
$(b)$ They give ninhydrin test.
$(c)$ On reacting with nitrous acid,they give off $N_2$.
$(a)$ Water solubility is maximum at a $pH$ when concentrations of anions and cations are equal.
$(b)$ They give ninhydrin test.
$(c)$ On reacting with nitrous acid,they give off $N_2$.
Medium
View SolutionIdentify the acidic amino acid from the following list represented by three-letter symbols.
During the denaturation of proteins,which of these structures will remain intact?
Which of the following gives a positive test with ninhydrin?
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