Understanding Vitamins and Minerals

Which of the following is a water-soluble vitamin?

• Vitamin A

• Vitamin C

• Vitamin D

• Vitamin E

Answer explanation

Vitamin C is a water-soluble vitamin, essential for various bodily functions, including collagen synthesis and immune support. In contrast, Vitamins A, D, and E are fat-soluble vitamins.

Which vitamin is fat-soluble?

• Vitamin B12

• Vitamin C

• Vitamin K

• Vitamin B6

Answer explanation

Vitamin K is a fat-soluble vitamin, meaning it dissolves in fats and oils. In contrast, Vitamin B12, C, and B6 are water-soluble vitamins, which do not store in the body in the same way.

Which mineral is essential for the formation of haemoglobin in red blood cells?

• Calcium

• Iron

• Potassium

• Sodium

Answer explanation

Iron is essential for the formation of haemoglobin, the protein in red blood cells that carries oxygen. Without sufficient iron, the body cannot produce enough healthy haemoglobin, leading to anemia.

A deficiency in which vitamin can lead to scurvy?

• Vitamin A

• Vitamin B12

• Vitamin C

• Vitamin D

Answer explanation

A deficiency in Vitamin C leads to scurvy, a disease characterized by weakness, anemia, and skin problems. Vitamin C is essential for collagen synthesis, and its lack results in the symptoms associated with scurvy.

Which mineral is crucial for maintaining healthy bones and teeth?

• Magnesium

• Zinc

• Calcium

• Phosphorus

Answer explanation

Calcium is essential for maintaining healthy bones and teeth, as it provides the structural component necessary for their strength and density. While magnesium, zinc, and phosphorus are important, calcium is the primary mineral for bone health.

Which vitamin is primarily obtained from sunlight exposure?

• Vitamin A

• Vitamin B12

• Vitamin C

• Vitamin D

Answer explanation

Vitamin D is primarily obtained from sunlight exposure, as the skin synthesizes it when exposed to UV rays. Unlike vitamins A, B12, and C, which are obtained from food, vitamin D's main source is sunlight.

Which of the following is a good dietary source of Vitamin E?

• Citrus fruits

• Leafy green vegetables

• Nuts and seeds

• Dairy products

Answer explanation

Nuts and seeds are excellent sources of Vitamin E, which is important for immune function and skin health. In contrast, citrus fruits, leafy greens, and dairy products contain lower levels of this vitamin.

Which vitamin deficiency can lead to night blindness?

• Vitamin A

• Vitamin B6

• Vitamin C

• Vitamin D

Answer explanation

Vitamin A deficiency can impair the production of rhodopsin, a pigment in the retina essential for low-light vision, leading to night blindness. Therefore, the correct answer is Vitamin A.

Which mineral helps in the regulation of blood pressure?

• Sodium

• Iron

• Iodine

• Zinc

Answer explanation

Sodium plays a crucial role in regulating blood pressure by helping to maintain fluid balance in the body. High sodium intake can lead to increased blood pressure, making it a key mineral in blood pressure regulation.

Which vitamin is essential for blood clotting?

• Vitamin A

• Vitamin B12

• Vitamin K

• Vitamin D

Answer explanation

Vitamin K is essential for blood clotting as it plays a crucial role in the synthesis of proteins required for this process. Without sufficient vitamin K, the body cannot effectively form blood clots.