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Hexokinase, that catalyzes the first irreversible step of glycolysis, is inhibited by glucose 6-phosphate. Thus when PFK is inhibited and fructose 6-phosphate builds up and so does glucose 6-phosphate due to these two metabolites are in equilibrium by phosphoglucoisomerase. Hexokinase inhibition then reinforces the inhibition at the PFK step. At first sight this seems commonly as it is usually the first irreversible step of a pathway (the committed step) that is the major control step. On this basis, it may appear in which hexokinase should be the main control enzyme not PFK. Furthermore, glucose 6-phosphate the product of the hexokinase reaction can also feed into glycogen synthesis or the pentose phosphate pathway. Thus the first irreversible step which is exclusive to glycolysis is which catalyzed by PFK and therefore this is the main control step.
Uptake of Ammonia Ammonia (NH 3 ) diffuses freely across biological membranes according to its concentration gradient. However, ammonium (NH + 4 ) ion requires a specific tra
What is yersiniosis? Give its symptoms. Yersiniosis caused by the bacteria Yersinia enterolytica. • Causes severe abdominal pain, fever and diarrhoea.
What is the dichogamy? Dichogamy is phenomenon of the maturation of female reproductive structures of the plant in a different period to the maturation of the male reproductive
Q. Example of Trial Balance columns? Start by extending all of Micro Train's revenue and expense account balances in the Adjusted Trial Balance columns to the Income Statement
Why is it important for chromosomes to be condensed during mitosis and decondensed during interphase? During mitosis the major problem to be solved is the correct separation of
Q. How do antibodies work to neutralize antigens? The immunoglobulins or antibodies act to facilitate the destruction of antigens: they attract phagocytic leukocytes, they dire
CARBOHYDR A TES Carbohydrate = hydrate of carbon. Hydroxyl group present. Aldehyde group or keto group may present. Carbohydrates are polyhydroxy aldehydes
Define Reaction of glucose and fructose with Fehlings reagent? Lactose is a milk sugar. It is a reducing disaccharide having a free sugar group and can reduce Fehling's reagent
characteristics of class mamalias
Define Interaction of niacin with other Nutrients? You may recall reading earlier that trypotophan present in dietary proteins is converted to niacin. There is an interdepend
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