Assignmentno 2Bio202ID:MC170404186QNO:1Describe the structural difference of steroids and cholesterol?Answer: Steroids Cholesterol A steroid is a lipid whose structure is base on the tetracyclic structure. The steroid structure have four rings . it have three cyclohexane ring and 1 cyclopentane ring.

Cholesterol is the major sterol in the animal tissues.  sterol is also a form of steroid but with eight to ten carbon atoms in the chain at C-17 and a hydroxyl group at C-3. Cholesterol also has  four rings like steroid but it has an eight carbon branched hydrocarbon chain which is attached to C-17 of the D ring and the ring A has a hydroxyl group at C-3 and the ring B has a double bond between C-5 and C-6. Steroid      QNO:2 Differentiate between bileacids and bile salts?Answer: Bile                     Bile is a fluid that ismade and free by the liver and stored in the gallbladder. Bile also help in thelipid digestion. Bile consists of a dilute mixture of organic and inorganiccompounds.                                                                                       Bile acids Bile salts 1.

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Bile acids are steroid acids which are found mainly in the bile of mammals and other vertebrates. Bile acids are conjugated with taurine or glycine in the liver and the potassium and sodium salts of these conjugated bile acids are called bile salts. These are most significant organic compounds of bile. 2. The bile acids contain the 24 carbons with 2 or 3 hydroxyl groups. And a side chain that terminates in a carboxyl group. Bile acids are synthesized in the liver by the multistep. a multiorganelle pathway in which a hydroxyl groups are inserted specific positions on the steroid structure and the double bound of the cholesterol B ring is reduced.

And the hydrocarbon chain is reduced by three carbons. The most common resultant compounds are the cholic acid and the chenodeoxycholic acid called a primery bile acid. In the synthesis of bile salts, before leaving the liver the bile acids are conjugated to a molecule of glycine or tourine by an amide bond between the carboxyl group of the bile acid and the amino group of the other compound. These new structure are called bile salts and contain glycocholic acids and glycochenodeoxycholic acids.  Example cholic acids and chenodeoxycholic acid Example Glycine and tourine.  


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