Gelatin and Cod Liver Oil Quiz

What color indicates a positive result for the Biurette test when gelatin is combined with copper sulfate and sodium hydroxide?

Which of the following is NOT a use of gelatin?

What is the primary constituent of gelatin?

Which component is mixed with gelatin to conduct the Biurette test?

What is a characteristic property of gelatin when tested with sodium hydroxide?

What type of precipitate is formed when one percent solution is mixed with picric acid?

Which combination produces a buff precipitate?

Which of the following combinations results in a white precipitate?

What gas is produced when gelatin is heated with soda lime or concentrated sodium hydroxide?

Which of the following is NOT a precipitate formed when one percent solution is mixed with any of the substances mentioned?

Gelatin

A 1% solution of gelatin forms a yellow precipitate when mixed with picric acid.
A 1% solution of gelatin forms a buff precipitate when mixed with tannic acid.
A 1% solution of gelatin forms a white precipitate when mixed with lead subacetate.
Heating gelatin with soda lime or concentrated NaOH produces ammonia gas.
Adding a few drops of CuSO4 and excess 20% NaOH to gelatin results in a violet color (Biurette test), indicating the presence of peptide bonds.
Gelatin's main constituent is protein (glutin).
Gelatin is used as a nutrient, in the preparation of pharmaceutical dosage forms (e.g., soft gelatin capsules), as a base for glycerin suppositories, and as a solidifying agent in bacterial cultural media.

Cod Liver Oil

Cod liver oil is extracted from the fresh liver of cod fish (Gadus callarias and other species of Gadus) belonging to the Gadidae family.
Cod liver oil contains vitamins A and D.
It also contains wax acids, such as cerotic acid and its homologs, hydrocarbons, and cholesteryl esters.

White Beeswax

White beeswax is bleached and purified beeswax.
The bleaching process involves melting the wax and allowing it to flow slowly over revolving wetted cylinders.
The wax hardens on the cylinders as thin ribbon-like layers, which are then removed and exposed to sunlight and air until they are completely bleached.

Test your knowledge on the properties and uses of gelatin and cod liver oil. This quiz covers the chemical reactions of gelatin, its nutritional benefits, and the significance of cod liver oil in diet. Gain insights into their applications in pharmaceuticals and dietary supplements.