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#1
By TheQuizWire
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Hard
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Fact Checked
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16 Jun 2026
Why does high phytate intake in cereal grains often lead to mineral deficiencies in some populations?
💡 Explanation:Phytates act as antinutrients by chelating essential minerals like iron, zinc, and calcium, forming insoluble salts that significantly reduce their intestinal absorption and bioavailability.
#2
By Zain
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Hard
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Fact Checked
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29 Jan 2026
What nutrient significantly enhances the bioavailability and intestinal absorption of non-heme iron when consumed concurrently?
💡 Explanation:Vitamin C (Ascorbic Acid) is a powerful reducing agent. It converts ferric iron (Fe3+), the form most commonly found in plant-based (non-heme) sources, into the more soluble and readily absorbed ferrous iron (Fe2+) state in the acidic environment of the stomach, significantly increasing its uptake.
#3
By Zain
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Medium
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Fact Checked
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27 Jan 2026
Vitamin B12 deficiency impairs DNA synthesis, primarily manifesting as which hematological condition?
💡 Explanation:Vitamin B12 (cobalamin) is a crucial cofactor for DNA synthesis. A deficiency leads to defective DNA production, which disproportionately affects rapidly dividing cells, such as red blood cell precursors in the bone marrow. This results in the formation of abnormally large, immature red blood cells (megaloblasts), a condition known as megaloblastic anemia. Iron-deficiency anemia is microcytic, hemolytic anemia is due to RBC destruction, and aplastic anemia is total bone marrow failure.
#4
By Zain
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Easy
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Fact Checked
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22 Jan 2026
Bleeding gums and poor wound healing are classic symptoms of a deficiency in which vitamin?
💡 Explanation:Bleeding gums, easy bruising, and impaired wound healing are the hallmark symptoms of scurvy, a disease caused by a severe deficiency of Vitamin C (ascorbic acid). Vitamin C is necessary for the synthesis of collagen, a protein vital for the health of connective tissues, blood vessels, and gums.
#5
By Zain
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Medium
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Fact Checked
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20 Jan 2026
Which vitamin class must be consumed regularly due to limited body storage and easy excretion?
💡 Explanation:Water-soluble vitamins (e.g., Vitamin C and B-complex) dissolve in water and are not stored in significant amounts by the body, leading to their rapid excretion via urine. Consequently, they must be consumed regularly. Fat-soluble vitamins (A, D, E, K) are absorbed and stored in the body's fatty tissues and liver, meaning they do not require daily intake.
#6
By The Quiz Wire
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Medium
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Fact Checked
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07 Dec 2025
Which essential macronutrient’s primary function is to serve as the building block for structural tissue and enzymatic reactions?
💡 Explanation:Proteins are composed of amino acids, often called the 'building blocks of life,' and their primary roles include the growth, repair, and maintenance of body tissues (like muscles and organs) and forming enzymes and hormones. Carbohydrates and Fats are primarily energy sources.
#7
By The Quiz Wire
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Medium
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18 Nov 2025
Which fat-soluble vitamin is crucial for the liver to synthesize the proteins necessary for normal blood coagulation (clotting)?
💡 Explanation:Vitamin K is essential for activating clotting factors, such as prothrombin, which are produced in the liver. A deficiency can lead to excessive bleeding.
#8
By The Quiz Wire
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Easy
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11 Nov 2025
What unit measures the energy humans obtain from food?
💡 Explanation:The Calorie (kcal) is the standard unit used to quantify the energy provided by food.
#9
By The Quiz Wire
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Medium
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09 Nov 2025
How many standard amino acids are classified as ‘essential’ for humans?
💡 Explanation:Nine of the 20 standard amino acids are essential, meaning the human body cannot synthesize them and they must be obtained from food.
#10
By The Quiz Wire
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Medium
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09 Nov 2025
Which fat-soluble vitamin is unique because the human body can synthesize it in the skin upon sufficient exposure to ultraviolet B (UVB) radiation from sunlight?
💡 Explanation:Vitamin D, often called the 'sunshine vitamin,' is the only vitamin that the human body can produce endogenously (internally) when the skin absorbs UVB radiation. It is crucial for calcium absorption and maintenance of healthy bones.
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