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Certain enzymes.
Lactate would not be usable by the mitochondria in the absence of glycolytic enzymes. Glycolytic enzymes are necessary to convert glucose into pyruvate, which can then enter the mitochondria for further energy production. Without these enzymes, lactate would accumulate and cannot be metabolized by the mitochondria.
Enzymes speed up a reaction but they are not changed by the reaction. They are a protein molecule that helps other organic molecules enter into chemical reactions with one another but is itself unaffected by these reactions. In other words, enzymes act as catalysts for organic biochemical reactions.
An enzyme is a catalyst, and it speeds up the biochemical reaction. It does this by providing an alternate pathway for the reaction to occur, and this alternate pathway has a lower activation energy than the pathway in the absence of the enzyme.
Virus particles are not cells or life forms, they are just some nucleic acids coated with proteins and few functional enzymes to infect its host and establish the production of new particles. In absence of host they are unable to do this.
Certain enzymes.
Lactate would not be usable by the mitochondria in the absence of glycolytic enzymes. Glycolytic enzymes are necessary to convert glucose into pyruvate, which can then enter the mitochondria for further energy production. Without these enzymes, lactate would accumulate and cannot be metabolized by the mitochondria.
human intestine
* Anal atresia -- congenital absence of a hole at the bottom end of the intestine. Also called imperforate anus. * Aortic atresia -- congenital absence of the normal valvular opening into the aorta. * Biliary atresia -- absence of the major bile ducts. * Choanal atresia -- congenital failure of one or both nasal passages to open. * Esophageal atresia -- a birth defect in which part of esophagus is not hollow. * Intestinal atresia -- obliteration of the hollow of the small intestine, involving the ileum (50% of cases) or the jejunum or duodenum. * Laryngeal atresia -- congenital failure of the laryngeal opening to develop, resulting in partial or total obstruction at or just above or below the glottis. * Pulmonary atresia -- congenital absence of the pulmonary valve opening in the heart. * Tricuspid atresia -- congenital lack of the tricuspid valve opening. * Vaginal atresia -- congenital occlusion of the vagina or subsequence adhesion (sticking together) of the walls of the vagina occluding it.
One, by the genetically controlled 'copy number' of the number of individual enzymes available to the cytoplasm; two, by the concentration {or presence} of control factors that determine the activity of individual enzymes; and three, by the presence or absence of various termination factors that determine which Version of an enzyme is to be produced.
The food is transported down the esophagus by a process called 'peristalsis' - NOT gravity. The food is 'pushed' by the contraction of cartilage rings around the digestive tract. This is why you can (for example) swallow a drink sipped through a straw, while standing on your head.
Gall stones prevent bile from moving out of the gall bladder into the small intestine, the absence of bile causes the pale faeces.
It can be concluded that Doctor Manette was absent for three days, during which something dreadful occurred. The passage suggests that there was an effort to keep certain details of the event from public knowledge.
Helen J. Morton-Coval has written: 'Study of the formation of enzymes by E. coli B in the absence of external inducers'
Intrinsic Factor. This, also known as gastric intrinsic factor (GIF),isa glycoprotein produced by thestomach necessary for the absorption ofB12 there and in the small intestine.
The absence of brain activity.The absence of brain activity.The absence of brain activity.The absence of brain activity.The absence of brain activity.The absence of brain activity.
The absence of nothing is everything. The absence of nothing is everything.