Biology ยท Chemistry

Carbohydrates and Biomolecules

986 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

What is the Maillard reaction?

  1. A chemical reaction between amino acids and reducing sugars

  2. A chemical reaction between proteins and fats

  3. A chemical reaction between carbohydrates and water

  4. A chemical reaction between vitamins and minerals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Maillard reaction is a chemical reaction between amino acids and reducing sugars that occurs when food is heated.

Multiple choice

What is the primary source of carbohydrates in bread?

  1. Protein

  2. Fat

  3. Starch

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

Starch is a complex carbohydrate that is found in large quantities in wheat flour. When bread is consumed, the starch is broken down into glucose, which is used by the body for energy.

Multiple choice

What is the glycemic index (GI) of white bread?

  1. Low (55 or below)

  2. Medium (56-69)

  3. High (70 or above)

  4. It varies depending on the type of white bread
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

White bread has a high glycemic index (GI), which means that it can cause a rapid increase in blood sugar levels after consumption.

Multiple choice

What is the primary sugar found in most fruit juices?

  1. Glucose

  2. Fructose

  3. Sucrose

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

Fructose is the primary sugar found in most fruits and their juices.

Multiple choice

Which of the following is a key ingredient in many Indian sweets, responsible for their characteristic sweetness?

  1. Sucrose

  2. Glucose

  3. Fructose

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

Sucrose, commonly known as table sugar, is the primary sweetener used in Indian sweets. It is a disaccharide composed of glucose and fructose, providing a pleasant sweetness and energy source.

Multiple choice

Which chemical reaction is responsible for the characteristic browning and caramelization of certain Indian sweets, such as jalebi and Mysore pak?

  1. Maillard Reaction

  2. Caramelization

  3. Glycation

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

The Maillard Reaction is a complex chemical reaction between amino acids and reducing sugars that occurs when heated. This reaction is responsible for the browning and caramelization of Indian sweets, imparting their distinctive color and flavor.

Multiple choice

Which type of sugar is naturally occurring in fruits and vegetables?

  1. Sucrose

  2. Glucose

  3. Fructose

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

Fructose is the natural sugar found in fruits and vegetables.

Multiple choice

What is the typical sugar content of jams?

  1. 30-40%

  2. 50-60%

  3. 60-70%

  4. 70-80%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Jams typically contain a high sugar content, ranging from 60-70%, which helps to preserve the fruit and create a thick consistency.

Multiple choice

What is the role of sugar in jam making?

  1. Sweetening agent

  2. Preservative

  3. Thickening agent

  4. Coloring agent
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Sugar plays a dual role in jam making. It acts as a sweetener to enhance the flavor of the fruit, and it also acts as a preservative by inhibiting the growth of microorganisms.

Multiple choice

What is the primary carbohydrate in breast milk?

  1. Lactose

  2. Glucose

  3. Fructose

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

Lactose is the primary carbohydrate in breast milk and is an important source of energy for newborns.

Multiple choice

What is the primary carbohydrate in formula milk?

  1. Lactose

  2. Glucose

  3. Fructose

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

Lactose is the primary carbohydrate in formula milk and is an important source of energy for newborns.

Multiple choice

What is the role of sugar in jam making?

  1. To add sweetness

  2. To thicken the jam

  3. To preserve the jam

  4. To add color to the jam
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sugar is added to jams primarily to provide sweetness. It also helps to preserve the jam by inhibiting the growth of microorganisms.

Multiple choice

Which of the following is essential for the production of energy in cells?

  1. Glucose

  2. Fructose

  3. Sucrose

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

Glucose is the body's primary source of energy and is used by cells to produce energy.

Multiple choice

What is the main component of honey?

  1. Glucose

  2. Fructose

  3. Sucrose

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

Honey is primarily composed of fructose and glucose, two simple sugars. Fructose is sweeter than sucrose (table sugar) and gives honey its characteristic sweetness.

Multiple choice

Which of the following is a carbohydrate found in milk and yogurt?

  1. Lactose

  2. Casein

  3. Whey

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lactose is the primary carbohydrate found in milk and yogurt.