CBSE Questions for Class 6 Biology Components Of Food Quiz 1 - MCQExams.com

• Fat has more than twice the calories per gram as carbohydrates and proteins.
• A gram of fat has about 9 calories, while a gram of carbohydrate or protein has about 4 calories. 
• Vitamins do not contain any significant calories. 

• The deficiency of vitamin A leads to a disease known as night blindness.
• Night blindness (Nyctalopia) is a type of vision impairment. People with night blindness have poor vision at night or in dim light. 
• It is due to a disorder of the cells in the retina of the eyes.

• A balanced diet is a diet that contains all the components in optimum proportions and quantity required for maintaining the body in a perfect state of health, activity and development. 
  
• Various components of a balanced diet are carbohydrates, fats, proteins, vitamins, minerals and roughage.
• A person should eat a balanced diet for healthy living. 

• Vitamin $$D$$ is synthesized in our body with the help of sun rays. Thus, it is also called the sunshine vitamin.
• It helps regulate the amount of calcium and phosphate in the body. These nutrients are needed to keep bones, teeth, and muscles healthy.
  

• Good food means a healthy diet. The balanced diet is a healthy diet as it contains all the necessary components of food required for a healthy body. It provides energy and strength to the body.

• A balanced diet consists of a major portion of carbohydrates followed by proteins, vitamins, fibres, and fats & oils.
• Carbohydrates are the main source of energy. 
• Vitamins are important for fighting diseases. 
• Proteins are important for building muscles. 
• Fats & oil are needed in a very less quantity. They also provide energy to the body. Thus, for all its development needs a body requires a balanced diet.

• Vitamin D helps in the absorption of Calcium in the body. 
• If a person has a deficiency of vitamin D then Calcium will not be absorbed in the body in adequate quantity. Hence, Calcium deficiency in the body occurs in the absence of Vitamin D.

So, the correct answer is 'Vitamin D'.

$$\textbf{Correct answer: C}$$ 

$$\textbf{Option (A):}$$ 

$$\bullet$$ Keeping people healthy, strong, energetic and long-lived is not achieved only with high-energy food. 

$$\bullet$$ High energy food is required by the individuals who exercise more and require the high calories to provide for the loss of calories which they need.

$$\textbf{Option (B):}$$ 

$$\bullet$$ Eating large amounts of food at a given time increases the chances of obesity.

$$\bullet$$ Overeating always leads to indigestion and constant intake of food with high calories will definitely lead to obesity.

$$\textbf{Option (C):}$$ 

$$\bullet$$ A person can stay healthy and feel energetic if they maintain a balanced diet. A balanced diet comprises all the nutrients as per the basic requirement of the individual. 

$$\bullet$$ All the food included in the diet must provide the essential nutrients which make the individuals stronger and help them live longer.

$$\bullet$$ This diet is important for maintaining healthy living standards. 

$$\textbf{Option (D):}$$ 

$$\bullet$$ The initiative and spirit to maintain a healthy life are not enough to sustain.

$$\bullet$$ People need the necessary nutrients that help them survive and work at the best of health. 

Hence, the correct answer is option (C).

• The iodine test is used for the determination of the presence of starch in a sample. 
• Molecular iodine is not soluble in water and hence potassium iodide is added to it. 
• Together they form a polyiodide complex which upon addition of starch turns intense blue-black colour. 
• Starch is a polymer of amylose and amylopectin, of which amylose is responsible for the blue colour of the reaction. 
• In the absence of starch solution remain as light brown colour which is the colour of iodine solution.

• We should eat a balanced diet for healthy living. A balanced diet is a diet that contains all the components in optimum proportions and quantity required for maintaining the body in a perfect state of health, activity, and development. 
• Various components of a balanced diet are carbohydrates (60 per cent), fats (20 per cent), proteins (20 per cent), vitamins (traces), minerals (traces) and roughage or fibre.
  So, option C is correct.