Biology ยท 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

Rayon is chemically

  1. cellulose

  2. glucose

  3. amylase

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

Rayon is a regenerated cellulose fiber made by dissolving cellulose (from wood pulp or cotton linters) and then extruding it through a spinneret to form fibers. Chemically, it is still cellulose - the process only changes the physical form, not the chemical composition. Glucose is the monomer that makes up cellulose, amylase is an enzyme, and pectin is a different polysaccharide.

Multiple choice

Which of the following sets represents disaccharides sugar?

  1. Sophorose, turanose, rutinose

  2. Glucose, ribose, furanose

  3. Sucrose, furanose, gentiobiose

  4. Ribose, sophorose, turanose

  5. Mannose, sophorose, rutinose
Reveal answer Fill a bubble to check yourself
A 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 from the functional groups only. The common examples of disaccharides are- sucrose, lactose, maltose, sophorose, turanose, rutinose etc.

Multiple choice

Glucose and galactose are

  1. enantiomers

  2. epimers

  3. geometical isomers

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

Glucose and galactose form an epimeric pair as they differ with respect to carbon-4 only.

Multiple choice

Which carbohydrate is used in silvering of mirrors?

  1. Fructose

  2. Sucrose

  3. Glucose

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

Fructose is a reducing sugar that contains an aldehyde group which can reduce silver ions (Ag+) to metallic silver (Ag) in Tollens' reaction and similar silvering processes. This reduction property is exploited in the silvering of mirrors. Sucrose is a non-reducing sugar, glucose and starch are not typically used in this chemical process.

Multiple choice

Which of the following is/are transported into the intestinal cells by both Na-independent and Na-dependent facilitated diffusion?

  1. Glucose

  2. Fructose

  3. Galactose

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

Dipeptides are transported into the intestinal cells by both Na-dependent and Na-independent facilitated diffusion. The Na-independent process of transport involves hydrogen peptide co-transport along a hydrogen gradient. In most systems, dipeptide transport is coupled with sodium uptake.