Tag: simple test for nutrients

Questions Related to simple test for nutrients

Some fruits and raw vegetables should be included in the diet because 

evs food components simple test for nutrients test for nutrients energy from different food components

  1. Vitamin A is present in this fruits and vegetables.

  2. Minerals are present only in raw vegetables.

  3. Vitamin C present in this food gets destroyed on cooking.

  4. Starch is not present in this food.

Show answer
Correct Option: C
Explanation:
Vitamin C is a water-soluble vitamin. So it gets passed out of the body through urine and sweat. Even if it is taken as in cooked food, it gets destroyed on cooking. So it is required to include raw fruits and vegetables in the diet.
So the correct answer is 'Vitamin C present in this food gets destroyed on cooking'.

Which ones function as regulators?

evs food components simple test for nutrients test for nutrients energy from different food components

  1. Carbohydrates

  2. Lipids

  3. Proteins

  4. Vitamins and minerals

Show answer
Correct Option: D
Explanation:

Vitamins and minerals function as regulators in growth and development process in living being. They also act as catalyst for various processes. Vitamin D acts as regulator in mineral metabolism. Some forms of vitamin A acts as regulator in growth and differentiation process. Minerals are part of enzymes that are part of many physiological processes.

Thus, the correct answer is option D.

The food sources which are rich in vitamins are 

evs food components simple test for nutrients test for nutrients energy from different food components

  1. Eggs

  2. Lemon

  3. Fish oil

  4. All of the above

Show answer
Correct Option: D
Explanation:
Eggs also called as referred as nature's multivitamin due to the presence of vitamins. One large egg contain vitamin B like: B12, B2, B5 and vitamin A.  
Lemon is a good source of vitamin C which is also called ascorbic acid. Whereas fish oil contain vitamin A and D. 
So the correct answer is 'All of the above'.

Which of the following is/are incorrect statement(s)?
i. Fried food is good for health.
ii. Vitamins protect us from diseases.
iii. Water helps in digestion of food.
iv. Spices are obtained from animals.

evs - i food components simple test for nutrients test for nutrients energy from different food components

  1. i and iv

  2. ii and iii

  3. iv only

  4. i and iii

Show answer
Correct Option: A
Explanation:

Fried foods contain high fat, calories and salt. They are cooked in hydrogenated fats(transfats). Eating them can put at a higher risk of developing diseases like heart diseases, diabetes etc.

spices are the substances which are used for colouring, preserving and flavouring the food. They may be in the form of seeds, fruit, leaves, barks etc. They are naturally obtained from plants.
So, the correct option is 'i and iv'.

The compound which is added to able salt for maintaining proper health is 

biology constitutes of diet nutrients and foodstuffs simple test for nutrients test for nutrients

  1. KCI

  2. KBr

  3. Nal

  4. $MgBr _{2}$

Show answer
Correct Option: C
Explanation:

NaI.

Most table salt also has added iodine, an essential nutrient that helps maintain a healthy thyroid.

A green leaf is partially covered and placed in the light for several days. If it is then boiled and tested for starch with iodine, what will be the result? 

biology constitutes of diet nutrients and foodstuffs simple test for nutrients test for nutrients

  1. Starch will be found only in the part of the leaf exposed to light

  2. Starch will be found in the entire leaf

  3. Starch will be found only in the shaded part of the leaf

  4. Starch will not be found in the leaf at all

Show answer
Correct Option: A
Explanation:

A green leaf is partially covered and placed in the light for several days. If it is then boiled and tested for starch with iodine starch will be found only in the part of the leaf exposed to light. This is because starch is the end product of photosynthesis. The process of photosynthesis will take place only in the location of leaves where light is present. 

In the given question, the leaf is partially covered which means, no photosynthesis takes place in these areas. Thus, when iodine is introduced to these parts after boiling, it cannot give blue-black color. Whereas the other parts which were exposed to sunlight will give blue-black color.
So, the correct answer is option A.

The presence of starch in leaves can be tested with

biology constitutes of diet nutrients and foodstuffs simple test for nutrients test for nutrients

  1. Iodine solution.

  2. Copper sulphate solution.

  3. Lime water.

  4. Benedict's solution.

Show answer
Correct Option: A
Explanation:

Starch is an important food reserve present in the leaf of the plant. The Iodine test is used to test for the presence of starch. Iodine solution where the iodine dissolved in an aqueous solution of potassium iodide reacts with the starch, producing a purple-black color.

So, the correct answer is option A.