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

The major component of honey is

  1. glucose

  2. sucrose

  3. maltose

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

Honey is primarily composed of simple sugars, with fructose being the most abundant sugar, followed by glucose. The option 'frustose' is a typo for fructose.

Multiple choice

General formula for Disaccharide is ____.

  1. C6 H22O6

  2. C12 H22O10

  3. C12 H22O11

  4. C6 H10O5
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Disaccharides are formed by two monosaccharides joined together. The general formula for a disaccharide like sucrose, lactose, or maltose is C12H22O11.

Multiple choice

Glucose, fructose and lactose are the examples of ________

  1. Proteins

  2. Carbohydrates

  3. Lipids

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

Foods rich in carbohydrates include bread, potatoes, dried peas and beans, rice, pasta, fruits, and vegetables. The digestible carbohydrates—starch and sugar—are broken into simpler molecules by enzymes in the saliva, in juice produced by the pancreas, and in the lining of the small intestine. Starch is digested in two steps. Sugars are digested in one step. An enzyme in the lining of the small intestine digests sucrose, into glucose and fructose, which are absorbed through the intestine into the blood. Milk contains another type of sugar, lactose, which is changed into absorbable molecules by another enzyme in the intestinal lining.

Multiple choice

Sucrose is also known as

  1. trible sugar

  2. double sugar

  3. single sugar

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sucrose is a disaccharide, meaning it is composed of two monosaccharides (glucose and fructose), hence it is called a double sugar.

Multiple choice

Which of the following changes occurs during strenuous exercise?

  1. Glucose is converted into glycogen.

  2. Glucose is converted into pyruvic acid.

  3. Starch is converted into glucose.

  4. Pyruvic acid is converted into lactic acid.

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

When sufficient oxygen is not present in the muscle cells for further oxidation of pyruvate and NADH produced in glycolysis, NAD+ is regenerated from NADH by the reduction of pyruvate to lactic acid.

Multiple choice

Which of the following is the most common respiratory substrate?

  1. Glucose

  2. Sucrose

  3. Maltose

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

Glucose is the most common respiratory substrate.Respiratory substrate is just any organic substance that can be broken down in respiration to release energy - so carbohydrates, lipids and proteins essentially.

Multiple choice

Table sugar is

  1. glucose

  2. sucrose

  3. maltose

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

Sucrose is commonly known as table sugar.