Biology · Chemistry

Carbohydrates and Biomolecules

1,073 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

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.

Multiple choice

Starch is a mixture of

  1. organic acids

  2. amino acids

  3. lipids

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

Starch is a polysaccharide carbohydrate composed of glucose units linked together. It is the primary storage form of energy in plants, found in grains, tubers, and other plant tissues. Chemically, starch consists of amylose and amylopectin, both of which are carbohydrates - not organic acids, amino acids, or lipids.