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

Glycosidic linkage is found in

  1. proteins

  2. fructose

  3. sucrose

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

In sucrose two monosaccharides are joined together by glycosidic linkage between C1 of α-glucose and C2 of β-fructose.

Multiple choice

Why are patients given glucose solution?

  1. Glucose gives instant energy.

  2. It is sweet in taste.

  3. It helps them to heal their wounds.

  4. It can easily be digested.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Yes, it is correct. Carbohydrates are source of energy. The glucose burns to release energy. It can be added directly into blood stream through intravenous drip. This enables patients to gain energy immediately and recovers at a faster rate.

Multiple choice

The backbone of sugar in RNA is

  1. deoxyribose

  2. ribose

  3. maltose

  4. sucrose

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

The sugars that are found in nucleic acids are pentose sugars. A pentose sugar has five carbon atoms. In RNA, ribose is found.

Multiple choice

Bacterial cell wall consists of which of the following?

  1. NAG

  2. NAM

  3. NAG and NAM

  4. Cellulose

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

The major structural component of the cell wall is peptidoglycan, which is a complex molecule that is composed of alternating units of N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) and is cross-linked by short peptides.

Multiple choice

Food is transported in plants in which of the following forms?

  1. Sucrose

  2. Fructose

  3. Glucose

  4. Lactose

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sucrose and starch are more efficient in energy storage as compared to glucose and fructose, but starch is insoluble in water. So, it cannot be transported via phloem. Sucrose, being water soluble and energy efficient, is chosen to be the carrier of energy from leaves to different parts of a plant.

Multiple choice

Cell wall in fungi is made up of

  1. glucans

  2. chitin

  3. hemicelluose

  4. Both 1 and 2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fungi possess cell walls that are made of the glucosamine polymer chitin and glucans.

Multiple choice

Which of the following is the most resistant known biological material?

  1. Lignin

  2. Hemicellulose

  3. Sporopollenin

  4. Lignocellulose
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sporopollenin is one of the most chemically inert biological polymers. It is a major component of the tough outer (exine) walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments.

Multiple choice

Starch is stored in potato tuber because sugar is

  1. synthesised in the leaf

  2. changed to starch in tuber

  3. transported from leaf to tuber

  4. produced in tuber

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

Food is formed in the form of sugar during photosynthesis in plants. Finally, the sugar is converted into starch as it is the storage form of food in plants.