Selina Concise Class 9 Biology Chapter 10 Nutrition Solutions
Nutrition
[Nutrition in general]
A.
1. Solution:
Answer: c) Fructose and glucose.
Explanation- The monosaccharides are simple sugars. The types of simple sugar includes glucose, fructose and galactose.
2. Solution:
Answer: d) Potassium – Banana.
Explanation- Potassium mineral is needs for nerve cells and cell permeability. Its source include banana, table sugar etc.
3. Solution:
Answer: b) Carbohydrates, Fats and proteins.
Explanation- Marasmus affects infants. Deficiency of carbohydrate, fat and protein in the meal or diet causes Marasmus.
4. Solution:
Answer: a) A, D and E.
Explanation- Some vitamins are naturally present in the foods. Some of them are synthesized in our body. Vitamins such as A, D, E, and K are fat soluble vitamins.
5. Solution:
Answer: c) Carrots
Explanation- Vitamins A is good for eye. Rich sources of vitamin A includes Butter, Liver, milk, Carrots, Yellow fruits etc.
6. Solution:
Answer: a) C
Explanation- Vitamin C promotes functioning of capillary walls and is Ascorbic acid.
B.
1. Solution:
a) True.
b) False.
c) False.
d) False.
e) True.
2. Solution:
i)Fluorine
ii) Iodine
iii) Iron
3. Solution:
i) Vitamin B12
ii) Vitamin B3
iii) Vitamin A
iv) Iodine (Mineral)
v) Proteins
4. Solution:
i)Marasmus- Marasmus causes due to proteins deficiency. Other are related to vitamin deficiency.
ii)Iodine- Iodine is mineral salt and other ones are vitamins.
C. Solution:
1.
i) Monosaccharides:
Glucose, fructose and galactose are simple sugars. Glucose and fructose are sources of ATP or energy.
ii) Disaccharide:
Maltose and sucrose are the examples of Double sugars. Maltose is an essential intermediate in the digestion of starch. Sucrose provides energy and keeps healthy.
iii) Polysaccharide:
Glycogen and cellulose are examples of polysaccharides. Cellulose is fibre and prevents constipation. Glycogen is a stored source of glucose.
2.
Answer:
A balanced diet includes all the principle constituents of food in appropriate quantity.
Example- Combination of food items that we eat in meal is diet. It includes proper amount of carbohydrates, fats, vitamins, minerals and proteins. Balanced diet of an individual depends upon Age, sex and needs of a person.
3.
Answer:
A doctor advises a bone patient to include more milk in everyday food because calcium and iron are responsible for making up bone. Milk and milk products contains calcium and vitamin A. Milk products or milk will make bone and teeth more strong.
D. Solution:
1.
Answer:
All the organism which are living requires food and following are the six main purposes behind the need of food:
- Growth- Food is required to build new cells for growth.
- Repair- Food provide the material to repair damaged or injured cells.
- Energy- To carry out various life processes, body needs energy and energy is provided by food items.
- Maintaince – Food maintains chemical composition cells.
- Provision of raw material
- Protection- If we eat healthy food then it will protects us against diseases and infections.
2.
Answer:
Protein contains carbon, hydrogen, oxygen, nitrogen, Sulphur and phosphorus. Nitrogen is one the essential element in the proteins. It provides chemical elements for the growth and it helps to repair body cells. In the emergency, proteins provides some amount of energy. Deficiency of proteins can cause Kwashiorkor disease.
This disease is also known for Sookha Rog and it affects young children.
3.
Answer:
Roughage are useful in our diet because of following:
- Roughage is important for the functioning of gut.
- Roughage remains undigested in our body.
- Roughage helps to remove cholesterol and toxins.
- Roughage prevents constipation.
- It absorbs water.
- Roughage mixes with intestinal waste and makes it bulky.
- It helps in stool formation.
E.
1.
- Thiamine
- Pellagra
- Ascorbic acid
- Citrus fruit
- Fish liver oil
- Rickets
- Retinol
- Night blindness
2. Solution:
i) Answer:
Iodine
Function- It is required for the proper functioning of thyroids.
Rich source- Mineral water and vegetables.
ii) Answer:
Iron
Rich source- Green leafy, liver and vegetables.
iii) Answer:
Calcium
Function- Helps in strengthening of bones and teeth.
Rich source- Milk, Meat, Eggs etc.
iv) Answer:
Potassium
Function- It is needed for the cell permeability.
Rich source- Table sugar, potato, Banana.
Here is your solution of Selina Concise Class 9 Biology Chapter 10 Nutrition
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