Deficiency of vitamin D in children leads to: MCQ with Answer and Explanation

Deficiency of vitamin D in children leads to:
A. Scurvy
B. Beri-beri
C. Pellagra
D. Rickets
Answer: Option D
Solution (By JKExamLibrary)
Rickets is characterized by defective mineralization of bones, leading to bowed legs, soft skull, and skeletal deformities due to vitamin D deficiency in children. In adults, deficiency causes osteomalacia. Scurvy is vitamin C deficiency, pellagra is niacin deficiency, beri-beri is thiamine deficiency. Vitamin D (calciferol) promotes calcium and phosphorus absorption from the gut. Sunlight exposure helps synthesize vitamin D in skin.

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Practice More Biology Questions

Question #1
Which of the following is a correct match regarding vitamin and its deficiency disease?
A. Vitamin C - Scurvy
B. Vitamin D - Pellagra
C. Vitamin B₁ - Scurvy
D. Vitamin A - Beriberi

Correct Answer: Option A


Explanation:
Vitamin C deficiency causes scurvy, marked by bleeding gums, poor wound healing, and anemia. Vitamin A deficiency causes night blindness. Vitamin B₁ deficiency causes beriberi. Vitamin D deficiency causes rickets/osteomalacia. Pellagra is due to niacin deficiency. Thus, the correct match is Vitamin C - Scurvy.

This question belongs to: Science Biology
Question #2
Identify the correct statement about plant water relations:
A. Osmosis is the movement of solutes.
B. Turgor pressure keeps plant cells rigid.
C. Water potential is higher in concentrated solutions.
D. Plasmolysis occurs in hypotonic solutions.

Correct Answer: Option B


Explanation:
Turgor pressure from water in the vacuole pushes the cell membrane against the wall, maintaining rigidity. Plasmolysis occurs in hypertonic solutions; osmosis is water movement; high solute concentration lowers water potential.

This question belongs to: Science Biology
Question #3
The forelimbs of humans, whales, bats, and cats are examples of:
A. Analogous organs
B. Homologous organs
C. Connecting links
D. Vestigial organs

Correct Answer: Option B


Explanation:
Homologous organs are structures that have a similar fundamental anatomical plan and evolutionary origin but may perform different functions. The forelimbs of humans (for grasping), whales (for swimming), bats (for flying), and cats (for running) all have the same basic bone structure (humerus, radius, ulna, carpals, metacarpals, phalanges), indicating divergent evolution from a common ancestor.

This question belongs to: Science Biology