Vitamins & Minerals — Set 4
Biology · विटामिन और खनिज · Questions 31–40 of 70
Osteoporosis is a condition characterized by brittle bones due to the deficiency of?
Correct Answer: A. Calcium
Calcium deficiency over a long period leads to a decrease in bone density. This makes the bones fragile and more prone to fractures, especially in older adults. Adequate intake of calcium and Vitamin D is necessary to prevent this.
Which of the following vitamins is found in golden rice?
Correct Answer: D. Vitamin A
Golden rice is a genetically modified variety produced to biosynthesize beta-carotene. Beta-carotene is the precursor that the body converts into Vitamin A. This crop was developed to tackle Vitamin A deficiency in developing nations.
The chemical name of Vitamin B1 is?
Correct Answer: D. Thiamine
Thiamine is essential for converting blood sugar into energy for the body. It is particularly important for the proper function of the heart and nervous system. It was the first of the B-vitamins to be discovered.
Which mineral is a part of the Vitamin B12 molecule?
Correct Answer: C. Cobalt
Cobalt is the central atom in the complex structure of Vitamin B12. This makes Vitamin B12 unique as the only vitamin containing a metal ion. The chemical name Cyanocobalamin reflects the presence of this mineral.
Which vitamin is produced by the body when exposed to the ultraviolet (UV) radiation of the sun?
Correct Answer: C. Vitamin D
The skin contains a precursor that turns into Vitamin D upon contact with sunlight. This vitamin is vital for maintaining normal blood levels of calcium and phosphorus. It is often referred to as the 'sunshine vitamin' for this reason.
Deficiency of Vitamin K leads to which of the following conditions?
Correct Answer: B. Difficulty in blood clotting
Vitamin K is a cofactor for enzymes that produce blood clotting factors. Its absence prevents the blood from thickening and sealing wounds effectively. Newborns are often given a Vitamin K injection to prevent bleeding issues.
Which mineral is essential for the production of red blood cells?
Correct Answer: A. Iron
Iron is necessary to produce heme, the part of red blood cells that carries oxygen. Low iron levels result in fewer red blood cells and lower hemoglobin levels. This leads to the medical condition known as iron-deficiency anemia.
Which vitamin is also known as Calciferol?
Correct Answer: C. Vitamin D
Calciferol is the chemical name for Vitamin D, which exists in several forms like D2 and D3. It promotes the mineralization of the bone matrix by aiding calcium absorption. It behaves more like a hormone than a traditional vitamin in the body.
Which mineral is the main component of the thyroid hormone 'Thyroxine'?
Correct Answer: D. Iodine
Iodine is a building block for thyroid hormones that regulate the body's metabolism. Without enough iodine, the thyroid cannot function properly, leading to metabolic issues. Seaweed and seafood are excellent natural sources of iodine.
Which vitamin is found in abundance in leafy green vegetables like spinach and kale?
Correct Answer: C. Vitamin K
Green vegetables are prime sources of Vitamin K1 (phylloquinone). This nutrient is necessary for bone health and proper blood coagulation. These vegetables also provide other vitamins and minerals like iron and Vitamin A.