Bacteria exist as single cells. The cells are very small, roughly the size of an animal (about 1-2μm in diameter and 10 μm long). Bacteria commonly occur in three major shapes: rod shaped, spherical, and spiral. Instead of going through elaborate replication processes like , bacterial cells divide by binary fission.
The capture of light energy for is enhanced by networks of in the arranged in aggregates on the thylakoids. These aggregates are called antennae complexes. Evidence for this kind of picture came from research by Robert Emerson and William Arnold in 1932 when they measured the oxygen released in response to extremely bright flashes of light. They found that some 2500 molecules of was required to produce one molecule of oxygen, and that a minimum of eight photons of light must be absorbed in the process.
Why does photosynthesis occur in eukaryotic cells
are not all gram-positive, despite the same. They are grouped together due to other similarities. This phylum includes the strain of streptococcus bacteria that causes strep throat. It also includes the bacteria that produces yogurt, by growing and fermenting in milk (producing lactic acid). These bacteria also produce many of our antibiotics.
Many Prokaryotes have only one photosystem, ..
Glycolysis itself yields two ATP molecules, so it is the first step of anaerobic respiration. , the product of glycolysis, can be used in to produce ethanol and + or for the production of lactate and NAD+. The production of NAD+ is crucial because glycolysis requires it and would cease when its supply was exhausted, resulting in cell death. A general sketch of the anaerobic steps is shown below. It follows Karp's organization.
Photosynthesis - California Polytechnic State University
Around 2.0 - 2.2 billion years ago a single-celled eukaryote ingested a cyanobacterium, and instead of digesting it, retained it as an active intracellular symbiont.
Prokaryotic photosynthesis and phototrophy …
are examples of the prokaryotic . An example is . In general, prokaryotic cells are those that do not have a membrane-bound nucleus. In fact "pro-karyotic" is Greek for "before nucleus". Besides bacteria, the cyanobacteria (blue-green algae) are a major group of prokaryotes. There are few well-distinguished internal structures in prokaryotes, in contrast to the multitude of distinct organelles in eukaryotes.
Prokaryotic photosynthesis and phototrophy ..
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?