Nutrition MCQs

Question 1

#1

By TheQuizWire

•

Hard

•

Fact Checked

•

29 Jan 2026

What nutrient significantly enhances the bioavailability and intestinal absorption of non-heme iron when consumed concurrently?

Answer

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.

Question 2

#2

By TheQuizWire

•

Medium

•

Fact Checked

•

27 Jan 2026

Vitamin B12 deficiency impairs DNA synthesis, primarily manifesting as which hematological condition?

Answer

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.

Question 3

#3

By TheQuizWire

•

Easy

•

Fact Checked

•

22 Jan 2026

Bleeding gums and poor wound healing are classic symptoms of a deficiency in which vitamin?

Answer

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.

Question 4

#4

By TheQuizWire

•

Medium

•

Fact Checked

•

20 Jan 2026

Which vitamin class must be consumed regularly due to limited body storage and easy excretion?

Answer

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.

Question 5

#5

By TheQuizWire

•

Medium

•

Fact Checked

•

07 Dec 2025

Which essential macronutrient’s primary function is to serve as the building block for structural tissue and enzymatic reactions?

Answer

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.

Question 6

#6

By TheQuizWire

•

Medium

•

18 Nov 2025

Which fat-soluble vitamin is crucial for the liver to synthesize the proteins necessary for normal blood coagulation (clotting)?

Answer

Vitamin K is essential for activating clotting factors, such as prothrombin, which are produced in the liver. A deficiency can lead to excessive bleeding.

Question 7

#7

By TheQuizWire

•

Easy

•

11 Nov 2025

What unit measures the energy humans obtain from food?

Answer

The Calorie (kcal) is the standard unit used to quantify the energy provided by food.

Question 8

#8

By TheQuizWire

•

Medium

•

09 Nov 2025

How many standard amino acids are classified as ‘essential’ for humans?

Answer

Nine of the 20 standard amino acids are essential, meaning the human body cannot synthesize them and they must be obtained from food.

Question 9

#9

By TheQuizWire

•

Medium

•

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?

Answer

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.

Question 10

#10

By TheQuizWire

•

Medium

•

07 Nov 2025

Which group of water-soluble vitamins functions primarily as coenzymes for metabolism?

Answer

The B-complex vitamins act as essential coenzymes, helping the body convert food into energy.

Nutrition MCQs

🧠 Interactive Daily Quiz

✅ Why Practice with Our MCQs?

❓ Frequently Asked Questions

How often are the MCQs updated?

Where are these questions sourced from?

Can I practice on mobile devices?

Nutrition MCQs

Related Topics

🧠 Interactive Daily Quiz

✅ Why Practice with Our MCQs?

❓ Frequently Asked Questions

How often are the MCQs updated?

Where are these questions sourced from?

Can I practice on mobile devices?