(a)(i) What is a deficiency disease? (ii) C..

Question 1 Report

(a)(i) What is a deficiency disease?

(ii) Complete the table below by naming five nutrient deficiency diseases in humans and stating one remedy for each of the diseases.

(b) Outline a chemical test for (i) Starch in a tuber of yam (ii) Glucose in orange fruit

Nutrient deficiency disease	Remedy

Answer

(a)(i) A deficiency disease is a medical condition caused by the lack of a specific nutrient in the diet, which results in symptoms or illness.

(a)(ii)

Nutrient deficiency disease	Remedy
Iron-deficiency anemia	Increase iron-rich foods in the diet or iron supplements
Vitamin C deficiency (Scurvy)	Increase consumption of fruits and vegetables high in vitamin C or vitamin C supplements
Vitamin D deficiency (Rickets)	Exposure to sunlight or vitamin D supplements
Iodine deficiency (Goiter)	Increase consumption of iodine-rich foods or iodine supplements
Vitamin A deficiency (Night blindness)	Increase consumption of vitamin A-rich foods or vitamin A supplements

(b)(i) Chemical test for starch in a tuber of yam:

Take a small piece of yam and add a few drops of iodine solution (iodine in potassium iodide). If the yam contains starch, it will turn blue-black in color.

(b)(ii) Chemical test for glucose in orange fruit:

Add a few drops of Benedict's reagent to a small amount of orange juice. Heat the mixture for a few minutes in a water bath. If glucose is present in the orange juice, the mixture will turn from blue to orange-red. The intensity of the color indicates the amount of glucose present.

Read lesson note on Evolution (Recombination DNA) (WAEC)

Answer Details

(a)(i) A deficiency disease is a medical condition caused by the lack of a specific nutrient in the diet, which results in symptoms or illness.

(a)(ii)

Nutrient deficiency disease	Remedy
Iron-deficiency anemia	Increase iron-rich foods in the diet or iron supplements
Vitamin C deficiency (Scurvy)	Increase consumption of fruits and vegetables high in vitamin C or vitamin C supplements
Vitamin D deficiency (Rickets)	Exposure to sunlight or vitamin D supplements
Iodine deficiency (Goiter)	Increase consumption of iodine-rich foods or iodine supplements
Vitamin A deficiency (Night blindness)	Increase consumption of vitamin A-rich foods or vitamin A supplements

(b)(i) Chemical test for starch in a tuber of yam:

Take a small piece of yam and add a few drops of iodine solution (iodine in potassium iodide). If the yam contains starch, it will turn blue-black in color.

(b)(ii) Chemical test for glucose in orange fruit:

Read lesson note on Evolution (Recombination DNA) (WAEC)

Evolution (Recombination DNA)

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(a)(i) What is a deficiency disease? (ii) Complete the table below by naming five nutrient deficiency diseases in humans and stating one remedy for each of ...

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