CIE iGCSE Co-Ordinated Science B7.1 Diet Exam Style Questions Paper 1
▶️ Answer/Explanation
Rickets is a disease caused by a deficiency of vitamin D in the diet. Vitamin D is essential for the absorption of calcium and phosphate from the gut, which are needed for the proper development and maintenance of strong bones. A lack of vitamin D leads to soft, weak bones that can become bowed or deformed.
Carbohydrate deficiency leads to lack of energy, protein deficiency causes kwashiorkor or marasmus, and vitamin C deficiency causes scurvy (bleeding gums, poor wound healing). Therefore, the nutrient deficient in a child with rickets is vitamin D.
✅ Answer: (D)
▶️ Answer/Explanation
Scurvy is a disease caused by a deficiency of vitamin C in the diet. Vitamin C is found in fresh fruits and vegetables, particularly citrus fruits like lemons. Bread, cheese, and eggs do not contain significant amounts of vitamin C. Therefore, consuming lemons helps prevent scurvy.
✅ Answer: (D)
✅ Answer: (D)
▶️ Answer/Explanation
Scurvy is caused by a deficiency of vitamin C in the diet. An increase in hospital admissions related to scurvy indicates that more people are suffering from this condition. Therefore, the diet must contain too little vitamin C, and the number of people affected has increased, which matches row C.
✅ Answer: (C)
✅ Answer: (C)
▶️ Answer/Explanation
Calcium is an essential mineral needed for the development and maintenance of strong bones and teeth.
Iron is needed to produce haemoglobin in red blood cells, which is the pigment responsible for carrying oxygen around the body.
✅ Answer: (C)
Iron is needed to produce haemoglobin in red blood cells, which is the pigment responsible for carrying oxygen around the body.
✅ Answer: (C)
▶️ Answer/Explanation
Dietary fibre is indigestible plant material (mainly cellulose) that adds bulk to the gut contents, stimulating the muscular contractions of peristalsis that move food through the intestine.
Without sufficient fibre, food moves too slowly through the large intestine, leading to constipation; fibre does not build tissue, bones, or supply iron — those are roles of protein, calcium/vitamin D, and iron minerals respectively.
✅ Answer: (C)
Without sufficient fibre, food moves too slowly through the large intestine, leading to constipation; fibre does not build tissue, bones, or supply iron — those are roles of protein, calcium/vitamin D, and iron minerals respectively.
✅ Answer: (C)