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 compounds is stored as glycogen in animals and starch in plants?

  1. Alcohol

  2. Ribose

  3. Glucose

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

Starch and glycogen both are ways of storing glucose, the energy source for the most cells. They both are polymers of glucose, produced by repeated condensation reactions between glucose molecules. When the glucose is needed, they can be broken down by hydrolysis reactions to release the glucose.

Multiple choice

Which of the following carbohydrates is associated with plants?

  1. Glycogen

  2. Chitin

  3. Amylopectin

  4. L-Glucose
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Amylopectin is a soluble polysaccharide and highly branched polymer of glucose found in plants. It is one of the two components of starch, the other being amylose and is associated with plants.

Multiple choice

Which of following statements is correct about carbohydrate portion of cell membrane?

  1. It provides to polycationic charge on extracellular surface.

  2. It has a symmetrical distribution.

  3. It is present primarily in kind of free saccharides groups.

  4. It produces glycocalyx composed of glycolipids and glycoproteins.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbohydrate portion of cell membrane produces glycocalyx composed of glycolipids and glycoproteins.

Multiple choice

Which polysaccharide is the major constituent of fungal cell wall?

  1. Lignin

  2. Cellulose

  3. Pectin

  4. Chitin

  5. Hemicellulose
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fungi possess cell walls made of the glucosamine polymer 'chitin'. It is a polymer of nitrogen-containing polysaccharide rendering a tough protective covering or structural support in certain organisms.

Multiple choice

Which is the most common hemicellulose present in the primary cell wall of plants?

  1. Xyloglucan

  2. Xylan

  3. Glucuronarabinoxylan

  4. Cutin

  5. Suberin

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Xyloglucans are the main hemicellulosic polysaccharides found in the primary cell walls of dicots and non-graminaceous monocots. Xyloglucan and cellulose together make up about two-thirds of the dry weight of primary cell walls and is the major tension bearing components of the matrix. 

Multiple choice

Which of the following is not a property of Lacasses?

  1. Lacasses are glycoproteins which are ubiquitous in nature

  2. Lacasses are a group of reductive enzymes

  3. Lacasses produce dimers and oligomers as reaction products when they are used in organic synthesis with substrates like phenols and amines

  4. Their uses extend from the textile to pulp and paper industry
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This option is correct because Lacasses are a group of oxidative enzymes as they catalyze monoeletronic oxidation of substrates as the expense of molecular oxygen.

Multiple choice

Nowadays, artificial sweetener is injected into raw fruits to maintain the sugar level. Which of the following types of sugar can be used as artificial sweetener(s)?

  1. Fructose
  2. Sucrose
  3. Glucose
  4. Lactose

  1. Only (1)

  2. Only (2)

  3. Only (2) and (4)

  4. Only (1) and (3)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fructose and glucose are simple carbohydrates - simple sugars which are responsible for generation of cellular energy, energy storage and are used as intermediates for the production of more complex biological molecules.

Lactose is a natural sugar, which is present in milk and dairy products. Sucrose, an organic compound, provides the taste of sweetness to fruits and other eatables.