Biology

Deficiency Diseases and Disorders

722 Questions

Deficiency diseases and disorders are caused by a lack of essential nutrients, vitamins, and minerals in the diet or environment. This includes conditions like anemia, goitre, and night blindness. Practice these questions to prepare for general science exams.

Vitamin deficiency symptomsMineral deficiency disordersMalnutrition conceptsHormonal and specific diseases

Deficiency Diseases and Disorders Questions

Multiple choice

The deficiency of Niacin causes

  1. pellagra

  2. marasmus

  3. kwashiorkar

  4. goitre
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Niacin (vitamin B3) deficiency causes pellagra, characterized by the 3 Ds: dermatitis, diarrhea, and dementia. Marasmus and kwashiorkor are protein-energy malnutrition disorders, while goitre results from iodine deficiency.

Multiple choice

The deficiency of vitamin A in the diet leads to

  1. beriberi

  2. blindness

  3. rickets

  4. typhoid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vitamin A deficiency leads to night blindness initially, which can progress to complete blindness (xerophthalmia) if untreated. Beriberi is caused by thiamine deficiency, rickets by vitamin D deficiency, and typhoid is a bacterial infection, not a deficiency.

Multiple choice

Diabetes is caused by the deficiency of

  1. glucose

  2. insulin

  3. vitamin C

  4. vitamin A
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Diabetes mellitus involves problems with insulin - either insufficient production (Type 1) or insulin resistance (Type 2), not a deficiency of glucose or vitamins A or C. Insulin is the hormone that regulates blood glucose levels.

Multiple choice

Which of the following is the main reason of SCID?

  1. Deficiency of ptylin

  2. Malnutrition

  3. Anemia

  4. Deficiency of ascorbic acid

  5. Deficiency of adenosine deaminase
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

It is an immunity disorder which causes SCID [Severe Combined Immunodeficiency].

Multiple choice

Deficiency of iron causes

  1. decrease in protein synthesis

  2. interveinal chlorosis on young leaves

  3. bending of stem tip

  4. reduced leaves and stunted growth
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Iron is essential for the synthesis of chlorophyll. Because iron is immobile within the plant, its deficiency first appears as interveinal chlorosis (yellowing between the veins) on young, developing leaves.

Multiple choice

In plants, a common symptom caused by deficiency of P, K, Ca and Mg is

  1. formation of anthocyanin

  2. shedding of leaf

  3. bending of leaf tip

  4. development of necrotic areas on leaves
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Necrosis refers to the localized death of plant tissue, often appearing as brown or black spots on leaves. Deficiencies in mobile macronutrients like Potassium (K) and Magnesium (Mg), as well as Calcium (Ca), frequently manifest as necrotic areas.

Multiple choice

Rickets disease is caused due to deficiency of

  1. vitamin A

  2. vitamin B

  3. vitamin C

  4. vitamin D

  5. none of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rickets is a skeletal disorder that results in soft and weak bones in children. It is most commonly caused by a prolonged and severe deficiency of Vitamin D, which is essential for calcium absorption. Vitamins A, B, and C are associated with different deficiency diseases like night blindness or scurvy.

Multiple choice

The disease caused by the deficiency of vitamin A:

  1. Xerophthalmia

  2. Scurvy

  3. Rickets

  4. Beri beri
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Xerophthalmia is a condition where the eyes fail to produce tears, often leading to corneal damage and blindness, caused by Vitamin A deficiency. Scurvy is caused by Vitamin C deficiency, Rickets by Vitamin D, and Beriberi by Vitamin B1.

Multiple choice

Lack of which vitamin is responsible for lack of sight and night blindness?

  1. A

  2. B

  3. C

  4. D
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vitamin A is essential for the health of the retina and the production of rhodopsin, a pigment that helps the eyes see in low light. A deficiency in Vitamin A leads to night blindness, where the individual struggles to see in the dark. Prolonged deficiency can lead to more severe vision loss.