4.2 Photosynthesis Overview Created by Megan Meyers
Some organsims produce their own chemical energy sources.
Plants are producers and capture energy from sunlight and use the stored chemical energy as sugars.
Those sugars are made through photosynthesis.
Photosynthesis takes place in the oranelles called chloroplats.
Chloroplast contains a molecule called chlorophyll which absorbs some of the energy in visible light.
The energy that comes from visible light is used in the photosynthesis process.
Visible light is formed out of differentent wavelengths (colors) of light even though it appears to be white.
The chlorophyll is formed out of two parts: chlorophyll a and chlorophyll b.
Those two types of chlorophyll abosrb red and blue wavelengths.
Green isn't aborbed much by either, plants are only green because green wavelengths reflect off of the chlorophyll.
For photsynthesis to take place, two main parts of chloroplasts are required.
One part is the grana: stacks of thylakoids (shaped like coins:circular).
The membrane encloses the thylakoid and the membrane contains chlorphyll.
The second part is the stroma: fluid that surrounds the grana inside of the chloroplast.
Photosynthesis includes two stages: light-dependent reactions and light-independent reactions.
The light-dependent reactions capture the sunlight's energy and this takes place in the thylakoid and their membranes.
The suns energy is absorbed by the chlorophyl and that energy is moved along the membrane of the thylakoid.
It is then transferred to molecules that will carry the energy.
Water molecules are broken down and oxygen molecules are released during this process.
The light-independent reactions makes sugars with the energy from the light-dependent reactions.
Sugars (glucose) are built with carbon dioxide and energy from the light-dpendent reactions during this process.
This entire process for Photosynthesis has an equation: Carbon dioxide+ water (light, enzymes) --------> A sugar+ oxygen
Plants are producers and capture energy from sunlight and use the stored chemical energy as sugars.
Those sugars are made through photosynthesis.
Photosynthesis takes place in the oranelles called chloroplats.
Chloroplast contains a molecule called chlorophyll which absorbs some of the energy in visible light.
The energy that comes from visible light is used in the photosynthesis process.
Visible light is formed out of differentent wavelengths (colors) of light even though it appears to be white.
The chlorophyll is formed out of two parts: chlorophyll a and chlorophyll b.
Those two types of chlorophyll abosrb red and blue wavelengths.
Green isn't aborbed much by either, plants are only green because green wavelengths reflect off of the chlorophyll.
For photsynthesis to take place, two main parts of chloroplasts are required.
One part is the grana: stacks of thylakoids (shaped like coins:circular).
The membrane encloses the thylakoid and the membrane contains chlorphyll.
The second part is the stroma: fluid that surrounds the grana inside of the chloroplast.
Photosynthesis includes two stages: light-dependent reactions and light-independent reactions.
The light-dependent reactions capture the sunlight's energy and this takes place in the thylakoid and their membranes.
The suns energy is absorbed by the chlorophyl and that energy is moved along the membrane of the thylakoid.
It is then transferred to molecules that will carry the energy.
Water molecules are broken down and oxygen molecules are released during this process.
The light-independent reactions makes sugars with the energy from the light-dependent reactions.
Sugars (glucose) are built with carbon dioxide and energy from the light-dpendent reactions during this process.
This entire process for Photosynthesis has an equation: Carbon dioxide+ water (light, enzymes) --------> A sugar+ oxygen
Photosynthesis website
Photosynthesis Video
Assessment
By Megan Meyers