A description of the process of photosynthesis

The surface of the leaf is coated with a water-resistant waxy cuticle that protects the leaf from excessive evaporation of water and decreases the absorption of ultraviolet or blue light to reduce heating.

photosynthesis formula

Carbon dioxide cannot pass through the protective waxy layer covering the leaf cuticlebut it can enter the leaf through the stoma the singular of stomataflanked by two guard cells. Plant-like protists, one-celled organisms containing chloroplasts, make their own contribution to the food chain and the conversion of carbon dioxide to oxygen.

Image credit: Shutterstock The following are cellular components essential to photosynthesis. The triose phosphates not thus "recycled" often condense to form hexose phosphates, which ultimately yield sucrosestarch and cellulose.

what is photosynthesis in biology

There is also a bacterial variant aptly named bacteriochlorophyll, which absorbs infrared light. These sugars are then used to make glucose or are recycled to initiate the Calvin cycle again.

Leaves and leaf structure Plants are the only photosynthetic organisms to have leaves and not all plants have leaves.

Chlorophylls: These green-colored pigments are capable of trapping blue and red light. Main articles: Chloroplast and Thylakoid In photosynthetic bacteria, the proteins that gather light for photosynthesis are embedded in cell membranes.

photosynthesis reaction

It is here that the transfer of electrons takes place. This effort limited severe famines to a few areas of the world despite rapid population growthbut it did not eliminate widespread malnutrition.

How does photosynthesis work

Photosynthesis Definition The word photosynthesis literally breaks down into "photo," Greek for "light," and "synthesis," a Greek word meaning "composition" or putting together. The process is also known as carbon fixation process, as it produces carbon compounds which store chemical energy meant to be used in cell growth. One chemosynthetic reaction, performed by bacteria at deep-sea hydrothermal vents, combines hydrogen sulfide, oxygen and carbon dioxide to form formaldehyde H-CHO, sometimes written as CH2O and release sulfur and water. Similarly, even algae and bacteria use carbon dioxide and hydrogen to prepare food, while oxygen is let out as a waste product. Ultimately, however, many plants would survive without animals, but most animals cannot live without plants or other photosynthesizing organisms. Almost all the oxygen present in the atmosphere can be attributed to this process, which also means that respiration and photosynthesis go together. He also demonstrated that this process required the presence of the green tissues of the plant. During oxygenic photosynthesis, light energy transfers electrons from water H2O to carbon dioxide CO2 , to produce carbohydrates. The cyclic reaction takes place only at photosystem I. This was especially true for rice in Asia.
Rated 8/10 based on 88 review