G12 Ch(1) Food PDF

1.2.3 Food (အစာားအစာ) ❑ Food is one of the major requirements of life. ❑ All forms of living matter required food in one form or the other as the source of life-sustaining energy. green plant ❑ However, plant only is able to manufacture food through the process of photosynthe...

1.2.3 Food (အစာားအစာ) ❑ Food is one of the major requirements of life. ❑ All forms of living matter required food in one form or the other as the source of life-sustaining energy. green plant ❑ However, plant only is able to manufacture food through the process of photosynthesis. ❑ Food may be classified into the following groups: ✓ Heat or energy producing food such as carbohydrates and fats: ✓ Body-building food such as protein: ✓ Protective food such as vitamins and some minerals; and ✓ Luxury food such as confectioneries, etc. confectioneries ❑ It is evident that food must contain sufficiently ✓ carbohydrates, ✓ protein and ✓ fats or oil together with ✓ vitamins and essential minerals. ❑ Without food, the viability of life is not feasible. ❑ Our food items come from plants and animals. ❑ Microbes aid in the formation of dairy products like curd, cheese, and yoghurt. ❑ The bacterium Lactobacillus helps in the formation of curd from milk. cheese yoghurt curd ❑ Similarly, yeast, one of the simplest eukaryotes, is used in the process of fermentation. ❑ Wine is obtained from grapes through a similar process. ❑ Furthermore, there are certain microbes and other biological processes that indirectly help in the production of food. ❑ The microorganisms present in the soil act as a decomposing agent, which assist in the production of the compost from dead and decaying organic matter. ❑ This compost acts as an effective fertilizer for the growing plants. Review and assessment (Food) 1. What is one of the major requirements of life according to the passage? (a) water (b) food (c) Shelter (d) Entertainment 2. Which process allows only plants to manufacture food? (a) Fermentation (b) Respiration (c) Photosynthesis (d) Decomposition 3. How many groups is food classified into according to the passage? (a) Two (b) Three (c) Four (d) Five 4. What aids in the formation of dairy products like curd, cheese, and yogurt? (a) plants (b)animals (c) microbes (d) fungi 5. What is yeast used for in the process of fermentation? (a) Producing alcohol (b) Producing antibiotics (c) Producing vitamins (d) Producing carbohydrates 6. How is wine obtained from grapes? (a) Through photosynthesis (b) Through fermentation (c)Through decomposition (d) Through respiration II. Answer all questions (Food) 1. How many types of major requirement food are classified. 2. What is the fermentation process? 3. How do you understand by the term compost?