Browse exam-wise, subject-wise, and country-wise MCQs with explanations.
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Transpiration is the loss of water vapor through plant surfaces.
Most of it occurs through leaf stomata.
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Roots anchor the plant and absorb water and minerals.
Root hairs increase the absorbing surface.
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Mitochondria produce much of the cell's ATP through respiration.
ATP supplies usable energy for cellular work.
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Chlorophyll absorbs light energy for photosynthesis.
It gives most plant leaves their green color.
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Plants use carbon dioxide and water to make glucose during photosynthesis.
Oxygen is released as a by-product.
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Specialized cells in the pancreas produce insulin.
Insulin helps regulate blood glucose.
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Iron is a key component of hemoglobin.
Insufficient iron can lead to iron-deficiency anemia.
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Vitamin D deficiency can impair bone mineralization in children.
The resulting condition is called rickets.
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Severe vitamin C deficiency causes scurvy.
Symptoms include weak gums, bruising, and poor wound healing.
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Sunlight helps the skin produce vitamin D.
This vitamin supports calcium absorption and bone health.
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Human body cells normally contain 46 chromosomes in 23 pairs.
Reproductive cells contain 23 chromosomes.
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The cerebellum coordinates movement, posture, and balance.
It lies at the back of the brain.
