Ch5 Revision: Carbohydrates, protein & lipids

Which of the following is formed from joining two glucose molecules together?

• Maltose

• Sucrose

• Lactose

• Starch

What are the products formed from the breakdown of a sucrose molecule?

• glucose

• galactose

• fructose

• maltose

What is the major form of carbohydrates stored in animals?

(a)  

Which of the following will NOT produce brick-red precipitate in Benedict's test?

• Lactose

• maltose

• sucrose

• starch

Which of the following carbohydrates is also a source of dietery fibre in our body?

• Starch

• Glycogen

• Cellulose

• All of above

Which of the following about Benedict's test is correct?

• Add equal volume of food sample and Benedict's solution.

• Add the food sample to Benedict's solution drop by drop.

• Boil the mixture of food sample and Benedict's solution in a hot water bath for 5 min.

• More brick-red precipitate will be formed if the food sample contains more reducing sugars.

Which of the following is the commonest type of lipids?

• Trisaccharides

• Triglycerides

• Glycerol

• Phospholipid

Triglyceride is formed from joining __________ + __________.​

• glycogen

• glycerol

• phosphate

• fatty acid

Which of the following about oil is NOT correct?

• They are liquid at room temperature.

• They mainly come from animals.

• They have a H:O ratio greater than 2:1.

• Nuts are rich in oils.

Each gram of lipid provides about _________ that of carbohydrates.

• half of

• the same as

• 1.5 times of

• more than twice