What is photosynthesis? - eschooltoday
The stroma contains stacks (grana) of thylakoids, which are the site of photosynthesis.
UCR Today: Physics, Photosynthesis and Solar Cells
Klaus Schulten's group has many areas of study, including software development as well as various fields of biophysics, such as magnetoreception, bionanotechnology, and of course, photosynthesis. But in 2005 he agreed to collaborate on a project with an experimentalist that promised a fascinating molecular machine to work with, and that would be a great test for the methodology and techniques his group has developed over the years to examine massive systems. What he and his students needed to do was combine data from X-ray crystallography with lower resolution data from the electron microscope, and the system in question was the cell's protein making factory: the ribosome. Essentially, to use an analogy, consider trying to understand a bird in flight. The X-ray crystallography data captures a crisp picture of a bird standing still on a wire, with the position of every claw, feather, and eye well known. But the electron microscopy image of a flying bird is more fuzzy, although captures the bird in the course of its function. What Schulten needed to do was apply all the crisp details of the motionless bird to the image of the bird in flight, therefore making it possible to explain flight, or the bird's function.
After forty-plus years of studying photosynthesis, Klaus Schulten has pieced together the intervening processes that occur between the absorption of sunlight and the generation of ATP. He feels he has finally garnered an understanding to suit himself, about the full mechanism of the photosynthetic membrane. With solution of the entire structure of the chromatophore at hand, Schulten was at a point in his career where he could illustrate the function of this autonomous machine, which harbors many processes that interlock together to make photosynthesis work. He had also demystified the role of each type of protein that comprises the chromatophore. At this juncture in time (2014), he harkened back to his long-cherished goal of explaining a whole cell, and realized he could by now reach this goal, by at least explicating a living system at the organelle level. He could show the function of chromatophore and how its proteins worked together like a Swiss watch to convert sunlight into ATP. But what he wanted to do scientifically he could only do with a movie.
The Origin of Photosynthesis Revealed | Rutgers Today
The site of photosynthesis is the thylakoid membrane, which contains integral and peripheral membrane protein complexes, including the pigments that absorb light energy, which form the photosystems. WHAT PIGMENTS ARE RESPONSIBLE FOR PHOTOSYNTHESIS?
At first, most scientists did not believe that all the reaction centers found in photosynthetic organisms today could possibly have a single common ancestor. True, all reaction centers harvest energy from light and lock it into compounds in a form that’s chemically useful to cells. To do this, the proteins pass electrons along a transfer chain of molecules in a membrane, as though skipping along a series of stepping stones. Each step releases energy that’s ultimately used down the line to make energy-carrier molecules for the cell.
Photosynthesis dictionary definition | photosynthesis …
A chromatophore is a complete cellular compartment that's part of a bacterial photosynthetic membrane. “It's essentially a machine that captures sunlight and converts it to chemically stored energy in the form of ATP, and it does so by a number of cooperating proteins,” Sener says. Similar to an organelle in eukaryotes, in bacteria this chromatophore is termed a pseudo-organelle. The chromatophore that Sener began working on is found in the purple bacterium Rhodobacter sphaeroides, contains several hundred proteins, and has a spherical shape that is in vesicle format, although not all chromatophores are spherical. One of the main tasks that Sener faced in the modeling project he light-heartedly compares to the forensics of road kill.
When Schulten moved to Illinois in 1988 he eventually met two scientists there at the university who also worked on photosynthesis: Antony Crofts and Colin Wraight, both from the School of Molecular and Cellular Biology. Schulten even published a photosynthesis paper in 1999 with Crofts. When Colin Wraight invited Schulten to a dinner in honor of a visitor from Sheffield, Schulten and the guest from England struck up a conversation about their respective work in photosynthesis. Neil Hunter, an experimentalist, was at that point in time imaging a structure called a chromatophore that was central to photosynthetic function in purple bacteria. Always on the lookout for collaborators, Schulten and Hunter decided to join forces to model the chromatophore.
NOVA - Official Website | Illuminating Photosynthesis
Photosynthesis | Definition of Photosynthesis by …
Photosynthesis - Wikipedia
Photosynthesis - Song with Free Worksheets and Activities
What is photosynthesis
Plants make their own food thru the process of photosynthesis
Glossary of Terms: P - Physical Geography
Since it was discovered in the soil around Iceland’s hot springs in the mid-1990s, H. modesticaldum has presented researchers with an interesting piece of the photosynthesis puzzle. The only photosynthetic bacterium in a family with hundreds of species and genera, heliobacteria’s photosynthetic equipment is very simple—something that became even more apparent when it was sequenced in 2008. “Its genetics are very streamlined,” said , a biochemist at Imperial College London.
LabBench Activity Plant Pigments and Photosynthesis
Instead of plants, Schulten chose to study purple bacteria, which embody the simplest form of photosynthesis. Bacteria emerged around 3.5 billion years ago on the earth; photosynthesis, an ancient process, arose sometime thereafter, although no firm evidence exists to prove its exact origins. While many associate it with plants, photosynthesis most likely originated in bacteria, and photosynthesis is found in many different phyla of bacteria today, purple bacteria being one of them. The purple bacteria are a gift for scientists studying photosynthesis, as the machine or unit that runs photosynthesis in these bacteria is simpler than the ones in plants.
What is Photosynthesis? (with pictures) - wiseGEEK
According to the facts of this phenomenon, this cycle has been going on for almost 3,500 million years, which is quite a long time.
The process of photosynthesis is the reason why all animals and human beings are alive today.
Basic products of photosynthesis - Encyclopedia …
During this process of food generation, the following reaction takes place:
According to the diagram of photosynthesis, the process begins with three most important non-living elements: water, soil, and carbon dioxide.
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