Quiz 1 Module 4 Midterms PPCHEM

What are tannins primarily composed of?

• Simple sugars

• Amino acids

• Polyphenols

• Fatty acids

Which of the following is a property of tannins?

• They crystallize easily.

• They have a sweet taste.

• They form colloidal solutions in water.

• They are insoluble in water.

Tannins are known to precipitate which of the following?

• Proteins

• Sugars

• Gelatin and alkaloids

• Vitamins

Hydrolyzable tannins are also known as:

• Catechol tannins

• Pyrogallol tannins

• Proanthocyanidins

• Phlobaphenes

Which of the following is a use of tannins?

• As a sweetener

• In the manufacture of ink

• As a preservative for fruits

• In the production of plastics

Non-hydrolyzable tannins are also known as:

• Hydrolyzable tannins

• Condensed tannins

• Simple tannins

• Aromatic tannins

Which plant is a source of nutgall?

• Hamamelis virginiana

• Quercus infectoria

• Fagaceae

• All of the above

What is the active constituent found in Hamamelis leaves?

• Tannic acid

• Hamamelitannin

• Gallic acid

• Ellagic acid

Tannic acid is primarily obtained from which source?

• Oak bark

• Nutgall

• Witch hazel

• Green tea

Which of the following statements about tannic acid is true?

• It is insoluble in water.

• It has a sweet taste.

• It is used in the treatment of bed sores.

• It is a synthetic compound.