FOOD PROCESSING AND PRESERVATION
FERMENTATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
photosynthesis uses light energy and needs oxygen, chemosynthesis uses chemical energy and needs water
|
|
|
photosynthesis uses light energy, chemosynthesis uses chemical energy
|
|
|
Photosynthesis needs water and carbon dioxide and chemosynthesis needs light and water
|
|
|
None of the above
|
Detailed explanation-1: -Photosynthesis and chemosynthesis are both processes by which organisms produce food; photosynthesis is powered by sunlight while chemosynthesis runs on chemical energy. The majority of life on the planet is based in a food chain which revolves around sunlight, as plants make food via photosynthesis.
Detailed explanation-2: -Chemosynthesis is the process by which food is made by bacteria or other living things using chemicals as the energy source, typically in the absence of sunlight. Chemosynthesis was first observed as the basis of a food web in 1977 during an ocean research expedition near the Galápagos Islands.
Detailed explanation-3: -Photosynthetic and chemosynthetic bacteria vary from each other in the fact that photosynthetic bacteria gain their energy from sunlight for the production of carbohydrates. On the other hand, chemosynthetic bacteria get their energy from the oxidation of inorganic compounds for the production of carbohydrates.
Detailed explanation-4: -During chemosynthesis, bacteria living on the sea floor or within animals use energy stored in the chemical bonds of hydrogen sulfide and methane to make glucose from water and carbon dioxide (dissolved in sea water). Pure sulfur and sulfur compounds are produced as by-products.