Question

Long answer questions
1. Categorise food into different types based on the nutrients present in them
Explain any two with examples.
2. Explain the complete process of digestion of food in the human body.
. Explain the precautions that need to be kept in mind while cooking food
. Write the tips for healthy digestion.
What is food preservation? Why does food need to be preserved?​

Answer 1

Answer:

All living organisms need nutrients to survive. While plants can obtain nutrients from their roots and the energy molecules required for cellular function through the process of photosynthesis, animals obtain their nutrients by the consumption of other organisms. At the cellular level, the biological molecules necessary for animal function are amino acids, lipid molecules, nucleotides, and simple sugars. However, the food consumed consists of protein, fat, and complex carbohydrates. Animals must convert these macromolecules into the simple molecules required for maintaining cellular function. The conversion of the food consumed to the nutrients required is a multistep process involving digestion and absorption. During digestion, food particles are broken down to smaller components, which are later absorbed by the body. This happens by both physical means, such as chewing, and by chemical means.