Science Quiz

Which of the following is considered an essential nutrient?

• Water

• Carbohydrate

• Plastic

• Metal

Answer explanation

Carbohydrates are essential nutrients that provide energy for the body. Water is also essential, but it is not classified as a nutrient in the same way carbohydrates are. Plastic and metal are not nutrients.

What is the atomic number of Iodine?

• 53

• 21

• 8

• 58

Answer explanation

Iodine has an atomic number of 53, which means it has 53 protons in its nucleus. The other options, 21, 8, and 58, correspond to different elements and are not correct for Iodine.

What is the role of essential nutrients in the body?

• To provide flavor to food

• To support nutrition and health

• To cause diseases

• To be stored as fat

Answer explanation

Essential nutrients are vital for supporting nutrition and health, as they provide the body with necessary substances for growth, repair, and overall functioning. They do not primarily serve to provide flavor, cause diseases, or be stored as fat.

How many types of carbohydrates are there?

• One

• Two

• Three

• Four

Answer explanation

Carbohydrates are classified into two main types: simple carbohydrates (sugars) and complex carbohydrates (starches and fibers). Therefore, the correct answer is two.

Which of the following is a source of complex carbohydrates?

• Sugar

• Fruit

• Pasta

• Dairy

Answer explanation

Pasta is a source of complex carbohydrates, which provide sustained energy. In contrast, sugar is a simple carbohydrate, while fruit and dairy contain both simple and complex carbs but are not primarily sources of complex carbohydrates.

Which of the following is NOT a starchy food?

• Grains

• Rice

• Vegetables

• Fruit

Answer explanation

Fruit is not considered a starchy food, as it primarily contains sugars and fibers. In contrast, grains, rice, and certain vegetables are high in starch, making them starchy foods.

Which of the following is a source of protein?

• Bread

• Meat

• Sugar

• Water

Answer explanation

Meat is a rich source of protein, essential for building and repairing tissues. In contrast, bread contains carbohydrates, sugar is a simple carbohydrate, and water has no protein content.

What type of nutrient are enzymes and hormones classified as?

• Carbohydrates

• Proteins

• Fats

• Vitamins

Answer explanation

Enzymes and hormones are classified as proteins because they are made up of amino acids and play crucial roles in biochemical reactions and regulation in the body.

Which vitamins are transported by lipids?

• B, C, D, E

• A, D, E, K

• A, B, C, D

• C, D, E, K

Answer explanation

Vitamins A, D, E, and K are fat-soluble vitamins, meaning they are transported by lipids in the body. In contrast, vitamins B and C are water-soluble and do not require lipids for transport.

What is the significance of water in chemical reactions inside the body?

• It acts as a catalyst

• It is a by-product

• It is used in many reactions

• It is not involved

Answer explanation

Water is essential in many biochemical reactions in the body, serving as a solvent and reactant. It participates in processes like hydrolysis and is crucial for maintaining cellular functions.