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

Which of the following sets represents disaccharides?

  1. Sophorose, turanose, ribose

  2. Furanose, gentiobiose, sucrose

  3. Sophorose, rutinose, mannose

  4. Furanose, glucose, ribose

  5. Turanose, rutinose, sophorose
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

A disaccharide is the carbohydrate formed when two monosaccharides undergo a condensation reaction which involves the elimination of a small molecule, such as water and from the functional groups only. The common examples of disaccharides are- sucrose, lactose, maltose, sophorose, turanose, rutinose etc.

Multiple choice

Which of the following statements is/are false?

a. Cellulose is a polymer that is made up of a large number of small glucose molecules joined one after the other. b. Wood contains a very less amount of cellulose polymer. c. The small molecules that join together to form a polymer are called monomers.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option as this statement is false. Wood contains a large amount of cellulose polymer.

Multiple choice

Ripe grapes contain

  1. fructose

  2. sucrose

  3. galactose

  4. glucose
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fructose is the primary sugar in ripe grapes, comprising about equal parts with glucose. While glucose is present, fructose is the dominant simple sugar that gives grapes their characteristic sweetness. Sucrose is common in sugarcane, galactose in milk.

Multiple choice

Which of the following is called a disaccharide?

  1. Sucrose

  2. Fructose

  3. Glucose

  4. Starch
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sucrose (table sugar) is a disaccharide composed of one glucose molecule and one fructose molecule bonded together. Fructose is a monosaccharide (single sugar unit). Glucose is also a monosaccharide, the most common simple sugar. Starch is a polysaccharide made of many glucose units linked together.

Multiple choice

The number of -OH groups in glucose is:

  1. 6

  2. 5

  3. 9

  4. 10
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glucose (C6H12O6) has five hydroxyl (-OH) groups - one on each carbon except the sixth carbon which has a -CH2OH group. The molecular formula shows 6 oxygens: 5 are in -OH groups and 1 is in the aldehyde group. Glucose does not have 6, 9, or 10 -OH groups.