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Olympiad Test: Components of Food - Class 6 MCQ


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20 Questions MCQ Test Science Class 6 - Olympiad Test: Components of Food

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Olympiad Test: Components of Food - Question 1

Which mineral is essential for strong bones and teeth?

Detailed Solution for Olympiad Test: Components of Food - Question 1

Calcium is an essential mineral for the development and maintenance of strong bones and teeth. It helps in the formation of bone structure and also plays a vital role in muscle function, nerve transmission, and blood clotting.

  • Iodine is important for thyroid function.
  • Sodium is essential for fluid balance and nerve function.
  • Iron is necessary for oxygen transport in the blood.

So, the mineral that is essential for strong bones and teeth is Calcium.

Olympiad Test: Components of Food - Question 2

Which of the following statements is/are correct with regard to our diet?

Detailed Solution for Olympiad Test: Components of Food - Question 2

All the statements are correct with regard to our diet:

  • A: Eat a diet rich in carbohydrates and proteins.
    Carbohydrates provide energy, while proteins are essential for growth, repair, and maintaining muscle mass.
  • B: Drink plenty of water.
    Water is crucial for hydration, digestion, and various body functions.
  • C: Eat green vegetables every day.
    Green vegetables are packed with vitamins, minerals, and fiber, which are important for overall health.

Therefore, the correct answer is D) All of these.

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Olympiad Test: Components of Food - Question 3

Priya placed two drops of a liquid on cooked rice which turned the rice blue- black. What could be the liquid?

Detailed Solution for Olympiad Test: Components of Food - Question 3

When iodine solution is applied to starch, it turns blue-black. Cooked rice contains starch, and iodine reacts with it to produce this color change.

  • Vegetable oil does not cause any color change in rice.
  • Benedict's solution is used to test for reducing sugars, and it would not turn rice blue-black.
  • Nitrate solution is used to test for the presence of nitrate ions, and it does not cause a color change with rice.

Therefore, the liquid that caused the rice to turn blue-black is Iodine solution.

Olympiad Test: Components of Food - Question 4

Match the following vitamins and minerals with their sources.

Detailed Solution for Olympiad Test: Components of Food - Question 4

The correct option is B

(i) - c, (ii) - d, (iii) - a, (iv) - b

Vitamins are nutrients that are required in very small amounts for the body metabolism. They cannot be produced in required amounts and need to be consumed as a part of our food. When one's diet does not contain sufficient amount of certain vitamins, a person can suffer from deficiency diseases.

  • Amla - Vitamin C
  • Carrot - vitamin A
  • Milk - Calcium
  • Salt - Iodine
Olympiad Test: Components of Food - Question 5

Which one of the following Vitamins deficiency leads to bleeding of gums, slow healing of wounds and aching limbs?

Detailed Solution for Olympiad Test: Components of Food - Question 5

A deficiency in Vitamin C leads to a condition known as scurvy. The symptoms of scurvy include:

  • Bleeding of gums
  • Slow healing of wounds
  • Aching limbs and joints

Vitamin C is essential for the production of collagen, which is necessary for healthy skin, blood vessels, and tissues. Without enough Vitamin C, the body's tissues weaken, leading to the symptoms mentioned above.

  • Vitamin A deficiency leads to night blindness and skin issues.
  • Vitamin B deficiency can lead to various problems like fatigue, nerve damage, and anemia.
  • Vitamin D deficiency leads to bone weakness, rickets in children, and osteomalacia in adults.

Therefore, the correct answer is (C) Vitamin C.

Olympiad Test: Components of Food - Question 6

Which of the following vitamins and their deficiency disease is NOT correctly paired?

Detailed Solution for Olympiad Test: Components of Food - Question 6
  • Vitamin A → Night blindness: Correct. Vitamin A deficiency can lead to night blindness, a condition where individuals struggle to see in low light.
  • Vitamin B1 → Scurvy: Incorrect. Vitamin B1 (Thiamine) deficiency leads to beriberi, not scurvy. Scurvy is caused by a deficiency in Vitamin C.
  • Iron → Anaemia: Correct. Iron deficiency leads to iron-deficiency anemia, where the body cannot produce enough healthy red blood cells.
  • Vitamin D → Rickets: Correct. A deficiency in Vitamin D can cause rickets in children, a condition characterized by weak bones.

So, the incorrect pairing is (B) Vitamin B1 → Scurvy.

Olympiad Test: Components of Food - Question 7

Nutrient is defined as__________.

Detailed Solution for Olympiad Test: Components of Food - Question 7

A nutrient is any substance that the body needs for growth, maintenance, and repair of tissues, and for regulating body processes. Nutrients are found in food and are essential for proper body functioning.

  • A is correct because nutrients are substances found in food that are essential for the body's proper functioning, including providing energy, supporting metabolism, and aiding in growth and repair.
  • B is incorrect because nutrients are not substances that alter body functioning in a negative way. They are essential for normal body functions.
  • C and D are incorrect because nutrients are specifically helpful to the body, unlike substances that are not useful for body functioning.

Thus, the correct answer is (A) Constituent of food that helps in body functioning.

Olympiad Test: Components of Food - Question 8

Which of the following nutrients is called “energy giving food”?

Detailed Solution for Olympiad Test: Components of Food - Question 8

Both fats and carbohydrates are classified as energy-giving foods because they provide the body with the energy required for various functions:

  • Carbohydrates are the body's primary source of energy. They are broken down into glucose, which provides immediate energy.

  • Fats are also an important source of energy, especially for long-term energy storage. They provide more energy per gram compared to carbohydrates.

Therefore, the correct answer is (C) both (a) and (b).

Olympiad Test: Components of Food - Question 9

The food items given below belongs to which of the following groups?

Beans, Peas, Pulses and Meat 

Detailed Solution for Olympiad Test: Components of Food - Question 9
  • Beans, peas, pulses, and meat are all rich in proteins. Proteins are essential for building and repairing tissues, and they are also important for immune function and enzyme production.

  • Fats are found in foods like oils, butter, and nuts.

  • Vitamins are found in fruits, vegetables, and dairy products.

  • Carbohydrates are mainly found in foods like bread, rice, and potatoes.

Thus, the correct answer is B) Proteins.

Olympiad Test: Components of Food - Question 10

White of an egg turns violet when two drops of copper sulphate and ten drops of caustic soda are added to it. This indicates the presence of which of the following components of food?

Detailed Solution for Olympiad Test: Components of Food - Question 10

The reaction described—where the white of an egg turns violet upon adding copper sulphate and caustic soda—is a test for the presence of proteins. This is known as the biuret test, which turns violet in the presence of proteins due to the chemical reaction between copper ions and the peptide bonds in proteins.

  • Starch is tested using iodine solution, which turns blue-black in the presence of starch.
  • Fats are tested using Sudan III dye, which stains fats red.
  • Vitamins are not detected in this manner.

Therefore, the correct answer is (B) Proteins.

Olympiad Test: Components of Food - Question 11

Which of the following vitamins are produced in our body when exposed to sunlight in the morning?

Detailed Solution for Olympiad Test: Components of Food - Question 11

When the skin is exposed to sunlight, specifically ultraviolet (UV) rays, the body produces Vitamin D. This vitamin is essential for the absorption of calcium and phosphorus, which are necessary for strong bones and teeth.

  • Vitamin A is obtained from foods like carrots and leafy vegetables.
  • Vitamin B includes a group of vitamins such as B1, B2, B6, and B12, which are obtained from various foods.
  • Vitamin K is important for blood clotting and is found in foods like leafy greens.

Thus, the correct answer is (C) Vitamin D.

Olympiad Test: Components of Food - Question 12

Which of the following food components is present in banana?

Detailed Solution for Olympiad Test: Components of Food - Question 12

Bananas are a good source of several vitamins and minerals, especially potassium, vitamin B6, and vitamin C ( 1 ). Potassium. Bananas are a good source of potassium

Olympiad Test: Components of Food - Question 13

Match the following pairs and choose the correct answer.

Detailed Solution for Olympiad Test: Components of Food - Question 13
  1. Spinach → Iron (c): Spinach is rich in iron, which is essential for producing hemoglobin in the blood.

  2. Milk → Calcium (d): Milk is an excellent source of calcium, which is vital for strong bones and teeth.

  3. Salt → Iodine (b): Salt, especially iodized salt, is a common source of iodine, necessary for proper thyroid function.

  4. Whole grain → Roughage (a): Whole grains are rich in fiber (roughage), aiding digestion and preventing constipation.

Thus, the correct matching is:
(i) Spinach → c
(ii) Milk → d
(iii) Salt → b
(iv) Whole grain → a

This corresponds to Option D.

Olympiad Test: Components of Food - Question 14

Which of the following vitamins is lost by heating?

Detailed Solution for Olympiad Test: Components of Food - Question 14

Vitamin C (Ascorbic acid) is water-soluble and highly sensitive to heat, light, and air. It is easily destroyed during cooking, especially when foods are exposed to high temperatures or long cooking times. This is why it's recommended to eat some fruits and vegetables raw to retain their Vitamin C content.

  • Vitamin A is fat-soluble and more stable during cooking.
  • Vitamin D is also fat-soluble and not easily destroyed by heat.
  • Vitamin K is relatively heat-stable and is not lost easily during cooking.

Therefore, the correct answer is (B) Vitamin C.

Olympiad Test: Components of Food - Question 15

Which of the following is a fat free and rich source of Vitamin A?

Detailed Solution for Olympiad Test: Components of Food - Question 15

Carrots are a rich source of Vitamin A in the form of beta-carotene, which the body converts into Vitamin A. Beta-carotene is a plant-based compound and is known for its antioxidant properties. Additionally, carrots are fat-free, making them a healthy option for boosting Vitamin A intake.

  • Potato contains some vitamins and minerals but is not a significant source of Vitamin A.
  • Honey does not contain Vitamin A in substantial amounts.
  • Eggs are rich in Vitamin A but also contain fats, especially in the yolk.

Therefore, the correct answer is (A) Carrot.

Olympiad Test: Components of Food - Question 16

Which of the following symptoms is shown by a person whose diet is deficient in proteins?

Detailed Solution for Olympiad Test: Components of Food - Question 16

A protein deficiency can lead to a condition called kwashiorkor, which is characterized by symptoms such as:

  • Swelling of the face (due to edema, which is the accumulation of fluid)
  • Edema in the legs, arms, and abdomen
  • Stunted growth and weak muscles

Protein is essential for growth, tissue repair, and maintaining fluid balance in the body. Without enough protein, the body cannot maintain this balance, leading to swelling.

  • Obesity is related to an imbalance in calorie intake (especially fats and carbohydrates), not protein deficiency.
  • Bent bones could be a sign of a deficiency in Vitamin D or calcium, not proteins.
  • Poor vision is generally associated with a deficiency in Vitamin A, not proteins.

Thus, the correct answer is (A) Swelling of face.

Olympiad Test: Components of Food - Question 17

How is roughage important to humans?

Detailed Solution for Olympiad Test: Components of Food - Question 17

Roughage, also known as fiber, is an important component of the diet that comes from plant-based foods like fruits, vegetables, whole grains, and legumes. It plays a crucial role in:

  • Preventing constipation by adding bulk to the stool and aiding in its movement through the digestive tract.
  • Maintaining digestive health, helping to regulate bowel movements and prevent conditions like diverticulosis.

While roughage is essential for digestive health, it does not directly build or repair tissues, produce hemoglobin, or maintain overall body health in the same way that proteins, iron, and other nutrients do.

Therefore, the correct answer is (A) Prevents constipation.

Olympiad Test: Components of Food - Question 18

Which of the following vitamins is present in the given substances? 

 

Detailed Solution for Olympiad Test: Components of Food - Question 18

Vitamin D is essential for helping the body absorb calcium, which is vital for maintaining strong bones and teeth. It can be obtained through exposure to sunlight and is also present in foods like eggs, butter, and milk.

  • Vitamin E is an antioxidant that helps protect cells from damage and is found in foods like nuts, seeds, and vegetable oils.
  • Vitamin K is important for blood clotting and is found in green leafy vegetables, broccoli, and certain oils.
  • Vitamin C is essential for the growth and repair of tissues and is found in fruits like oranges, strawberries, and bell peppers.

As per the solution, Vitamin D helps the body use calcium for bones and teeth, and it is found in sunlight, eggs, butter, and milk.

Thus, the correct answer is (B) Vitamin D.

Olympiad Test: Components of Food - Question 19

Nutrients are classified into________ types.

Detailed Solution for Olympiad Test: Components of Food - Question 19

Nutrients are classified into 5 types based on their functions and the role they play in maintaining good health. These include:

  1. Carbohydrates – Provide energy.
  2. Proteins – Help in growth and repair of tissues.
  3. Fats – Provide energy and support cell functions.
  4. Vitamins – Regulate body functions and help in various biochemical processes.
  5. Minerals – Help in the formation of bones, teeth, and other body functions.
Olympiad Test: Components of Food - Question 20

Which of the following classes of food is present in pulses?

Detailed Solution for Olympiad Test: Components of Food - Question 20

Pulses (such as lentils, beans, chickpeas, and peas) are a rich source of proteins. They are an important part of a vegetarian diet and help in building and repairing tissues, making enzymes and hormones, and supporting overall growth.

  • Vitamins are present in fruits, vegetables, and dairy products, not primarily in pulses.
  • Fats are present in oils, nuts, and seeds, but pulses contain very little fat.
  • Carbohydrates are also present in pulses, but their primary nutrient content is protein.

Therefore, the correct answer is (D) Proteins.

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