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

What are carbohydrates?

  1. A type of sugar

  2. A type of fat

  3. A type of protein

  4. A type of vitamin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbohydrates are a type of sugar that is made up of carbon, hydrogen, and oxygen atoms.

Multiple choice

What is the chemical formula for glucose?

  1. C6H12O6

  2. C12H22O11

  3. C18H32O16

  4. C24H42O21
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glucose is a simple sugar with the chemical formula C6H12O6.

Multiple choice

What is the difference between simple and complex carbohydrates?

  1. Simple carbohydrates are made up of one sugar unit, while complex carbohydrates are made up of two or more sugar units.

  2. Simple carbohydrates are found in fruits and vegetables, while complex carbohydrates are found in grains and legumes.

  3. Simple carbohydrates are digested quickly, while complex carbohydrates are digested slowly.

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

Simple carbohydrates are made up of one sugar unit, while complex carbohydrates are made up of two or more sugar units. Simple carbohydrates are found in fruits and vegetables, while complex carbohydrates are found in grains and legumes. Simple carbohydrates are digested quickly, while complex carbohydrates are digested slowly.

Multiple choice

Which of the following is a complex carbohydrate?

  1. Glucose

  2. Fructose

  3. Starch

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

Starch is a complex carbohydrate that is found in grains, legumes, and potatoes.

Multiple choice

What is the glycemic index?

  1. A measure of how quickly a food raises blood sugar levels

  2. A measure of how much sugar a food contains

  3. A measure of how many calories a food contains

  4. A measure of how much fat a food contains
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The glycemic index is a measure of how quickly a food raises blood sugar levels.

Multiple choice

What is the primary target of the immune system in celiac disease?

  1. Gluten proteins

  2. Lactose sugar

  3. Fructose sugar

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

Celiac disease is an autoimmune disease triggered by gluten proteins found in wheat, barley, and rye. The immune system mistakenly attacks the lining of the small intestine when gluten is consumed, leading to inflammation and damage.

Multiple choice

What type of sugar is commonly used in ice cream?

  1. Sucrose

  2. Glucose

  3. Fructose

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

Sucrose, also known as table sugar, is the most common type of sugar used in ice cream.

Multiple choice

What is the approximate sugar content of honey?

  1. 60-70%

  2. 70-80%

  3. 80-90%

  4. 90-100%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Honey typically contains around 70-80% sugar, primarily fructose and glucose.

Multiple choice

What is the difference between simple and complex carbohydrates?

  1. Simple carbohydrates are broken down more quickly than complex carbohydrates

  2. Complex carbohydrates are broken down more quickly than simple carbohydrates

  3. Simple carbohydrates provide more energy than complex carbohydrates

  4. Complex carbohydrates provide more energy than simple carbohydrates
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Simple carbohydrates are broken down more quickly than complex carbohydrates because they have a simpler structure. This means that they can be absorbed into the bloodstream more quickly and provide a faster source of energy.

Multiple choice

Which of the following is a simple carbohydrate?

  1. Glucose

  2. Fructose

  3. Sucrose

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

Glucose is a simple carbohydrate because it is a monosaccharide, which means that it cannot be broken down into smaller molecules. Fructose and sucrose are also simple carbohydrates, but they are disaccharides, which means that they can be broken down into two monosaccharides.

Multiple choice

Which of the following is a complex carbohydrate?

  1. Starch

  2. Cellulose

  3. Glycogen

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

Starch, cellulose, and glycogen are all complex carbohydrates because they are polysaccharides, which means that they are made up of many monosaccharides linked together. Starch is a storage form of carbohydrates in plants, cellulose is a structural component of plant cell walls, and glycogen is a storage form of carbohydrates in animals.

Multiple choice

What is the difference between net carbohydrates and total carbohydrates?

  1. Net carbohydrates are the total carbohydrates minus the fiber

  2. Net carbohydrates are the total carbohydrates minus the sugar

  3. Net carbohydrates are the total carbohydrates minus the starch

  4. Net carbohydrates are the total carbohydrates minus the protein
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Net carbohydrates are the total carbohydrates minus the fiber. Fiber is a type of carbohydrate that cannot be digested by the body, so it does not provide any calories or energy.

Multiple choice

What is the glycemic index of a food?

  1. A measure of how quickly a food raises blood sugar levels

  2. A measure of how much sugar a food contains

  3. A measure of how many calories a food contains

  4. A measure of how much fat a food contains
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The glycemic index is a measure of how quickly a food raises blood sugar levels. Foods with a high glycemic index cause blood sugar levels to rise quickly, while foods with a low glycemic index cause blood sugar levels to rise slowly.

Multiple choice

What is the primary sugar found in milk?

  1. Glucose

  2. Fructose

  3. Lactose

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

Lactose is a disaccharide composed of glucose and galactose, and it is the main sugar found in milk.

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 fruit juices, accounting for about half of their total sugar content.