(5 ptos) La bacteria Escherichia coli frente a un descenso en la temperatura ambiental desencadena la síntesis de una enzima desaturasa que introduce dobles enlaces en las cadenas hidrocarbonadas de los ácidos grasos. Con respecto a esto responda las siguientes preguntas. a) (1 pto) ¿Qué ocurre con la fluidez de la membrana a altas temperaturas? Justifique brevemente. b) (2 ptos) ¿Qué ventaja presenta en este organismo la capacidad de sintetizar la enzima desaturasa? Justifique brevemente. c) (2 ptos) ¿Qué sucede con los mecanismos de transporte de membrana cuando E. Coli es sometida altas temperaturas? Justifique brevemente.

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explanation:

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answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.