Photosynthesis

Karina Leyva

Introduction-

This is the site to explain the process of photosynthesis is and how it works and what it does and how it helps the environment. Every living thing need food to survive, some depend on other for food and energy but plants make there own.

Photosynthesis-

What is photosynthesis? Photosynthesis is the process of converting light energy to chemical energy and storing it in the bonds of sugar.This process occurs in plants and some algae.
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How dose Photosynthesis work?

There is three parts of Photosynthesis


  • The first one is to capture energy from the sunlight ( light absorbed )
  • a process called the photophosphorylation.
  • The calvin cycle

http://www.calpoly.edu/~mforte/dream/p3.html

Light Absorbed

Chlorophyll drives a transfer of electrons and hydrogen from water to an acceptor called NADP+ which temporarily stores the energized electrons. Water is split in the process, and thus it is the light reactions of photosynthesis that give off 0, as a by-product. The electron acceptor of the light reactions, NADP+, is first cousin to NAD', which functions as an electron carrier in cellular respiration; the two molecules differ only by the presence of an extra phosphate group in the NADP+ molecule

http://www.calpoly.edu/~mforte/dream/p3.html

Photophosphorylation

The light reactions use solar power to reduce NADP+ to NADPH by adding a pair of electrons along with a hydrogen nucleus, or H The light reactions also generate ATP by powering the addition of a phosphate group to ADP The light reactions use solar power to reduce NADP+ to NADPH by adding a pair of electrons along with a hydrogen nucleus, or H The light reactions also generate ATP by powering the addition of a phosphate group to ADP and ATP, the versatile energy currency o that the light reactions produce no sugar; that happens in the second stage of photosynthesis, the Calvin cycle.

http://www.calpoly.edu/~mforte/dream/p3.html

Calvin Cycle

The cycle begins by incorporating C02 from the air into organic molecules already present in the chloroplast. This initial incorporation of carbon into organic compounds is known as carbon fixation. The Calvin cycle then reduces the fixed carbon to carbohydrate by the addition of electrons. Calvin cycle also requires chemical engery in the form of ATP, which is also generated by the light reactions. Thus, it is the Calvin cycle that makes sugar, but it can do so only with the help of the NADPH and ATP produced by the fight reactions. The metabolic steps of the Calvin cycle are sometimes referred to as the dark reactions, or fight-independent reactions, because none of the steps requires light directly. Nevertheless, the Calvin cycle in most plants occurs during daylight, for only then can the fight reactions regenerate the NADPH and ATP spent in the reduction Of C02 to sugar. The chloroplast uses light energy to make sugar by coordinating the two stages of photosynthesis.

http://www.calpoly.edu/~mforte/dream/p3.html

chloroplast

the food producers of the cell. The organelles are only found in plant cells and some protists such as algae. Animal cells do not have chloroplasts. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells.
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