The model that emerges is that of some 300 chlorophyll molecules and 40 or so and other acting as a light harvesting antenna surrounding one chlorophyll a molecule that is a part of an action center. A photon is absorbed by one of the pigment molecules and transfers that energy by successive events to neighboring molecules until it reaches the action center where the energy is used to transfer an energetic electron to an electron acceptor.
Carbon dioxide fixation (dark reaction) occurs during the day time and is strictly dependent on the light reaction, i.e., the formation of reductive power as NADPH.
how is light used in photosynthesis? | Yahoo Answers
I can say that the
increase in distance thus making the light intensity stronger
increased the rate of photosynthesis and when further away made the
rate of photosynthesis almost come to its limiting factor the
straitening of the graph.
To show experimentally that light is necessary for photosynthesis.
Prediction: I predict that the oxygen bubbles will decrease when the lamp is further away from the measuring cylinder, because light intensity is a factor of photosynthesis.
Light Absorption for Photosynthesis - HyperPhysics …
The energy derived from is used in particular pathways to achieve the final result of synthesis of sugars. Since the pathways are known, a theoretical maximum efficiency can be calculated. It is known that a total of 8 photons of light must be absorbed to reduce two molecules of +. Operating in the , the resulting two molecules of NADPH can produce one hexose molecule. The of a median energy photon at 600nm is 2.07 eV, and for 8 moles of such photons the energy absorbed is
What Is Photosynthesis? From Light Energy to Chemical …
But what about the development of land plants? Why did they stay green? The thoughts are that they had plenty of light and were not pressured to develop more efficient light gathering. That is, the light was not the limiting resource in photosynthesis for plants.
Photosynthesis English | Photosynthesis | Cellular …
Current understanding is that the earliest photosynthetic organisms were aquatic bacteria, some of which are still around today. One of these, halobacterium halobium, grows in extremely salty water. It makes use of the bacteriorhodopsin pigment. The chlorophyll system developed to use the available light, as if it developed in strata below the purple bacteria and had to use what it could get.
PowerPoint Slide 7 can also be used
Variables The input variable which will be used in this investigation will be the light intensity (this will be a 100Watt bulb being moved closer and further away from the plant)....