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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.
Q Are there living beings without cells? Viruses are considered the only living beings that do not have cells. Viruses are constituted by genetic material RNA or DNA enwrapped
Define hypertension, discuss its causes and explain its effects on the body. What role, if any, does medical imaging play in hypertensive patients? Explain and give examples.
WHY BLOOD IS CALLED FLUID CONNECTIVE TISSUE
Define Quantitative or Analytical Method for Estimation of Nitrogen and Protein? You may recall reading earlier that proteins contain nitrogen along with carbon, hydrogen and s
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Amniocentesis is a way of prenatal testing in which the amniotic fluid is withdrawn from the uterus by the help of a needle. The fluid and the fetal cells it contains are analyzed
Q. Which is the extraembryonic membrane whose function is to store nitrogen wastes of the embryo? Is this function present in placental mammalian embryos? The allantois is the
CUTIN It is a lipid formed by polymerization and cross-esterification of hydroxy fatty acids. Cutin occurs inside outer epidermal walls of plant surfaces as bringing agent t
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