Question

what r steroids explain​

Answer 1

ANSWER

explanation

A steroid is a biologically active organic compound with four rings arranged in a specific molecular configuration. Steroids have two principal biological functions: as important components of cell membranes which alter membrane fluidity; and as signaling molecules. Hundreds of steroids are found in plants, animals and fungi. All steroids are manufactured in cells from the sterols lanosterol (opisthokonts) or cycloartenol (plants). Lanosterol and cycloartenol are derived from the cyclization of the triterpene squalene.

The steroid core structure is composed of seventeen carbon atoms, bonded in four "fused" rings: three six-member cyclohexane rings (rings A, B and C in the first illustration) and one five-member cyclopentane ring (the D ring). Steroids vary by the functional groups attached to this four-ring core and by the oxidation state of the rings. Sterols are forms of steroids with a hydroxy group at position three and a skeleton derived from cholestane .Steroids can also be more radically modified, such as by changes to the ring structure, for example, cutting one of the rings. Cutting Ring B produces secosteroids one of which is vitamin D3.

Examples include the lipid cholesterol, the sex hormones estradiol and testosterone and the anti-inflammatory drug dexamethasone

hope it is helpful..............................

Answer 2

Answer :-

In general terms, Steroids can be defined as the derivatives of a four-membered ring compound called "Phenanthrene".

Extra Information :-

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• Cholesterol is one of the most important animal steroids.

• Cholesterol is useful since it is a structural component of cells.

• Cholesterol is synthesized from acetyl CoA or acetate (C₂) in the liver and thus, is not considered as an essential dietary substance.

• Hormones like Androgens, Estrogens, Progestins, Glucocorticoids, Mineralcorticoids and bile acids are steroids derived from cholesterol in animals.

• "Ergosterol" is the principal plant sterol present in high concentration in yeast which upon irradiation, gets converted into "Vitamin D".

• Bile acids are derivatives of cholesterol which are synthesized in the Liver.

• Bile acids (derivatives of cholesterol) are the major components of Bile juice.

• Bile acids (derivatives of cholesterol) help in the emulsification of fats in the small intestine.