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Cyanobacteria carry out photosynthesis using two photosystems as in green plants. Furthermore, other photosynthetic bacteria, like as the purple photosynthetic bacterium Rhodospirillum rubrum which have only a one photosystem reaction center. This can hold out cyclic electron transport, producing a proton gradient and thus synthesizing ATP (cyclic photophosphorylation). In other words, a noncyclic pattern of electron transport can be carried out in that the electrons from the cytochromes pass to NAD+ (rather than NADP as in green plants) to create NADH. The electron donor is, for instance, hydrogen sulfide (H2S) that produces sulfur (S). The Hydrogen gas (H2) and a various of organic compounds can also be used as electron donors by particular photosynthetic bacteria. Because H2O is not used as electron donor, no oxygen is formed.
Risk Assessment of Biological Hazards Biological hazards of concern to public health include pathogenic strains of bacteria, viruses, helminths, protozoa, algae and certain tox
Describe about the therapies of illicit drugs do to the brain Despite recent availability of new therapies for addiction, only a small proportion of people who need treatment
Q. Is there an exchange of cells between the mother and the fetus through the placenta? Under usual conditions there is no passage of cells across the placenta during gestation
general Characters
Define the effect of niacin deficiency on Skin? Dermatitis is the characteristic feature of the' disease, It is symmetrical in distribution. In early stages, a bright red eryt
Q. What are the two main species of taenias that cause human diseases? The two chief species of taenias that cause disease in humans are Taenia solium, or the pork tapeworm, an
Explain the periodic table of the elements ? Periodic Table of the Elements : An element is a pure substance composed of atoms all of a single kind. It cannot be broken down
State about the importance of Potassium Potassium is the third major element required for plant growth, generally absorbed as K + ion. In soil 95 to 99 percent of potassium e
Neurological Assessment The neurological assessment is made up of eight neurological criteria which have high, significance with gestational age. (Fig. 3.2) In order to perf
Q. Can Diseases be etiological factor for diabetes? Diseases: In aging, a very important cause of diabetes could be an underlying disease. Diabetes occurs secondary lo some ot
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