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The nitrogenase complex is extremely sensitive to inactivation by O2, so the enzyme must be protected from this reactive substance. During the root nodules of leguminous plants, protection is afforded by the symbiotic synthesis of leghemoglobin. The globin part of this monomeric oxygen-binding protein is synthesized by the plant, whereas the heme group is synthesized by the Rhizobium. Leghemoglobin has a very high affinity for O2 for maintaining a low enough concentration to protect the nitrogenase.
Modified or Semi-synthetic Gums These are natural polymers, which are chemically modified to give a new product with improved functional properties. These also fall into severa
explain chemical changes during cleavage
Excretion in Protozoans Excretion of metabolic wastes is dope almost exclusively by diffusion. All protozoans are ammonotelic i.e., the end product of their nitrogen metabolis
Starch Retrogradation The starch paste or solution obtained after the gelatinisation is not stable and generally produces a viscoelastic, firm and rigid gel. Structural transf
Q. What is the normal duration of the menstrual cycle? How does the calendar contraceptive method work? The normal duration of the menstrual cycle is 28 days but it can vary am
A)Which of the following statements about DNA structure is true? 1.The nucleic acid strands in a DNA molecule are oriented ant parallel to each other, meaning they run in opposite
Stratification - Aquatic ecosystems Aquatic ecosystems also exhibit marked stratification. In lake and ocean ecosystems light penetration, temperature and availability of oxyg
What is Tricuspid Atresia: Surgery for Single Ventricle Physiology In tricuspid atresia, the right atrium fails to open into right ventricle through a right atrioventricular va
Q. Collection of plant specimens? Collection of plant specimens is essential for taxonomic research. These circumscribe species and document their variability. Plant material i
What are genetic mutations? The Genetic mutations are alterations of the genetic material (compared to the normal condition of the species) involving modifications in the norma
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