CBSE Questions for Class 6 Biology Components Of Food Quiz 3 - MCQExams.com

• Essential nutrients are the ones that cannot be made by the body. They need to be derived from the food.
• The six essential nutrients are vitamins, minerals, protein, fats, water, and carbohydrates.
  
• Enzymes are biocatalysts, whereas alcohol is often formed as by-products in anaerobic respiration. These aren't related to nutrients and their types.

$$\textbf{Correct answer: C}$$  

$$\textbf{Option (C):}$$  

$$\bullet$$ Deficiency diseases do not occur due to the presence of any pathogen.

$$\bullet$$ It occurs due to the deficiency of a specific nutrient. The nutrients which are absent in the diet lead to deficiency in the body resulting in the condition of a disease.

$$\bullet$$ The diseases that can be passed on from one person to another are called communicable diseases.

$$\bullet$$ These are generally pathogenic disorders that can move from an infected individual to a healthy individual. 

$$\bullet$$ The level of nutrient intake varies from one person to another. This is why deficiency diseases are not communicable.

$$\bullet$$ Deficiency diseases can definitely be prevented by the intake of a balanced diet.

$$\bullet$$ If a person takes a balanced diet then they have all the nutrients that they require in the right amounts.

$$\bullet$$ This is why a person who has a balanced diet will never face the adversity of deficiency diseases.

Therefore, statements (ii) and (iv) true about deficiency diseases.

Hence, the correct answer is option (C).

$$\textbf{Correct answer: A}$$  

$$\textbf{Option (A):}$$  

$$\bullet$$ Nutrients form an essential part of life because it is metabolized to produce energy that is required by the sales in the system. 

$$\bullet$$ Energy is also required for the repair and growth of tissues in the system.

$$\textbf{Option (B):}$$  

$$\bullet$$ Money is not an essential commodity for life. This is because it is not part of the major necessities which are food, clothing and shelter. 

$$\textbf{Option (C):}$$  

$$\bullet$$ Plants are not essential for the maintenance of life. Plants are life forms that can be used as a source of nutrients.

$$\textbf{Option (D):}$$  

$$\bullet$$ Animals are not essential for the maintenance of life. Animals themselves need the supply of nutrients and shelter to survive.

Hence, the correct answer is option (A).

$$\textbf{Correct answer: C}$$  

$$\textbf{Option (A):}$$  

$$\bullet$$ Vegetarians do not have meat as a source of protein in their diet. This is why they need a supplementary protein source which can compensate for the requirement of protein in the body.

$$\bullet$$ Stating from the calorific point of view there are different components like soybean, milk and milk products, pulses and groundnut which all can provide the required protein.

$$\bullet$$ The amount of protein present in 100 grams of soybean is 12.36 grams.

$$\textbf{Option (B):}$$  

$$\bullet$$ The amount of protein present in gram seeds is 19 grams for every 100g of gram seeds.

$$\textbf{Option (C):}$$  

$$\bullet$$ The protein present in groundnut is about 26 grams for every 100 grams of groundnut.

$$\bullet$$ As compared to the other food components groundnut can be used as a chief source of proteins, lipids and fibres. 

$$\bullet$$ Even though all the given food components can act as a source of protein, groundnut can provide the highest level of dietary protein.

$$\textbf{Option (D):}$$  

$$\bullet$$ The protein content of milk is 3 grams for every 100 grams of milk. 

Hence, the correct answer is option (C).

• Good food contains the necessary nutrients required by the body to have good height, good weight, and good strength and hence good health.

• A balanced diet is a diet that contains the quality and proportions of nutrients needed to maintain good health and to sustain life.
• In a balanced diet, 40-60% of the diet should come from carbohydrates, 20-30% of the diet should come from fats and 10-20% of the diet should come from protein.