Biology · Chemistry

Carbohydrates and Biomolecules

986 Questions

Carbohydrates and biomolecules questions test your understanding of sugars, monosaccharides, and metabolic substrates. The topic covers food transportation in plants and the biochemical properties of sweeteners. Practicing these questions builds a strong foundation for exam preparation.

Disaccharides and monosaccharidesArtificial sweetenersGlycogen storagePlant food transportGlycoprotein hormones

Carbohydrates and Biomolecules Questions

Multiple choice

Match the following

  1. Starch A. It is stored in the liver of animals
  2. Dextrans B. It is found in roots and tubers of onions, garlic, dahlias and dandelions
  3. Glycogen C. It is found in amyloplasts and chloroplasts ofplant cells
  4. Chitin D. It is found in yeast and bacteria
  5. Inulin E. It occurs in insects and arthropods like crabsand also in fungi.

  1. 1 - C, 2 - E, 3 - A, 4 - B, 5 - D

  2. 1 - E, 2 - D, 3 - A, 4 - B, 5 - C

  3. 1 - B, 2 - D, 3 - E, 4 - C, 5 - A

  4. 1 - C, 2 - D, 3 - A, 4 - E, 5 - B

  5. 1 - D, 2 - C, 3 - A, 4 - E, 5 - B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Starch is found in amyloplasts and chloroplast of plant cells in higher plants in the form of compact and insoluble granules. Dextrans occur in yeast and bacteria in the form of a stock polysaccharide. Glycogen is found in abundance in the liver of animals and forms the most essential food reserve in animals. It is also called animal starch. Chitin is found in abundance in insects and arthropods like crabs. Vertebrates cannot digest chitin. Inulin occurs in roots and tubers of onions, garlic, dahlias and dandelion. It is white powdery in nature and can be used to determine the functioning of kidney by measuring Glomerular Filtration Rate.

Multiple choice

The polysaccharide mentioned in the passage in question 19 exhibits which of the following linkages?

This fibrous structural polysaccharide is present in abundance in the plant cell walls but absent in animals.

  1. (β-1 -> 4) glycosidic linkage

  2. (β-1 -> 3) linkages

  3. (α-1 -> 6) glycosidic linkage

  4. (β-2 -> 1) fructosidic linkages

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cellulose (a fibrous structural polysaccharide) is an unbranched and linear polymer of β-D-glucose attached with a (β-1 -> 4) glycosidic linkage. It is also known as anhydride of β-D-glucose.

Multiple choice

Simple sugar of blood is

  1. galactose

  2. glucose

  3. glycerol

  4. sucrose

  5. lactose
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is the main sugar of blood, it also contains 6 carbon atoms. The normal blood glucose level is 80-120 mgdl.

Multiple choice

Chitin, a polysaccharide cannot be digested by animals just like cellulose. But chitin possesses an acetyl-amino group at the second carbon unlike cellulose. What molecule is involved in the breaking of the beta-1,4-glycoside linkages of cellulose and chitin?

  1. Water

  2. Nitrogen

  3. Oxygen

  4. Alpha-1, 4- glycosidase

  5. Beta-1, 4- glycosidase
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Both alpha and beta linkages in polysaccharides are hydrolyzed by adding water.

Multiple choice

Which food component is present in sugar?

  1. Fats

  2. Proteins

  3. Vitamins

  4. Carbohydrates
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sugar is the generalised name for sweet, short-chain, soluble carbohydrates, many of which are used in food.