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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.
What are the Advantages of Grains Diabetics should have more grains, beans and starchy vegetables every day. Whole-\ grain foods are nutritious and high in fiber, such as whol
How is the nervous system of molluscs organized? Molluscs have well-developed sensory structures. It is established that cephalopods, such as squid and octopus, have eyes with
According to their morphology how are bacteria classified? Bacteria present dissimilar morphological patterns. A bacterium can be classified into coccus, bacillus, vibrion or s
Initiation of Development - Development Biology We know that the various events collectively called the activation programme. These events are directly related to the formatio
Q What is the kind of digestive system of echinoderms? Echinoderms present a complete digestive system with anus and mouth. Q. Do sea urchins have teeth? Sea urchins ha
Which type of cell came first in evolution the eukaryotic cell or the prokaryotic cell? Ans) This is an interesting problem of biological evolution. The most accepted hypothesis
Q. What is the function of the left ventricle? Where does the blood go after leaving the left ventricle? The function of the left ventricle is to pump the blood under high pres
Q. Explain the Causes of steatorrhoea? The list of possible underlying causes of steatorrhoea includes: • Malabsorption • Malabiorptian of fats in small intestine •
point out the criticism of lamarckism in any six short points.
Shifting cultivation - Degradation of Ecosystem This method of cultivation is practised all over the globe, but is more prevalent in the tropical countries. In this practice a
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