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LenaWriter [7]
3 years ago
10

What is the activation energy of a chemical reaction?

Biology
1 answer:
Elden [556K]3 years ago
6 0
The activation energy of a given chemical reaction is the minimum required amount of energy needed to start the reaction, for the reaction to start. All reactions have an activation energy, even spontaneous ones, ones that do occur spontaneously. It is a thermodynamic barrier that separates the amount of energy reactant molecules must possess to ultimately react with each other to produce the respective products.
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Do you think the vacuum hose is an effective way to remove sea urchins? Why? Explain at least one way this technology can be imp
mamaluj [8]

Answer:

No, or at least not yet. there small and dont do much improvment. If they were much bigger and sucked better, including some touch-ups here and there, they would have a bigger effect on removing sea urchins.

Explanation:

4 0
2 years ago
The cholera toxin, an AB exotoxin, attaches an ADP-ribose group to the host's stimulatory G factor (Gs). The normal function of
SCORPION-xisa [38]
<h2>b) option is correct </h2>

Explanation:

  • Some bacterial toxins cause disease by  altering the activity of G protein, cholera toxin is one of them
  • Cholera toxin catalyse ADP ribosylation of Gs and blocks GTPase activity thus Gs GTP become permanently active
  • Constitutive activation of Gs protein continuously induce adenylyl cyclase, cytosolic cAMP level rises that leads to activation of protein kinase A (pKA)
  • Activated pKA catalyse phosphorylation of two transmembrane proteins of intestinal epithelial cells:
  • CFTR cause excessive outflow of Cl- ion and Na+ H+ exchange cause efflux of Na+ ion, both enters in gut and form Na+ Cl-
  • Na+Cl- leads to outflow of water from the gut, resulting in diarrhea and dehydration and this condition may cause death of organisms due to loss of water and ions  
6 0
3 years ago
Conteste los siguientes enunciados, registrando (F) si es falso y (V) si es verdadero. 1. ( ) Una mujer portadora de hemofilia,
Ksenya-84 [330]

Answer:

1. Verdadero

2. Falso

3. Falso  

4. Falso

5. Verdadero

Explanation:

Los seres humanos, como así también la mayoría de los mamíferos, poseen dos cromosomas sexuales: un cromosoma X y un cromosoma Y. Las hembras poseen 2 cromosomas X (un cromosoma X es heredado de la madre y el otro cromosoma X es heredado del padre); mientras que los hombres tienen un cromosoma X y un cromosoma Y (el cromosoma X es heredado de la madre, mientras que el cromosoma Y es heredado del padre). La hemofilia es una enfermedad recesiva monogénica ligada al cromosoma X, la cual está caracterizada por cuadros hemorrágicos causados por el déficit parcial y/o total de factores de coagulación. Los hombres expresan el fenotipo recesivo con mayor frecuencia que las mujeres para aquellos genes que se encuentran en el cromosoma X y poseen un mecanismo de herencia recesivo, esto debido a que los hombres sólo poseen una copia del alelo ligado al X (lo que hace que el alelo recesivo se exprese con mayor frecuencia en el fenotipo). De este modo, los hombres manifiestan hemofilia con mayor frecuencia que las mujeres porque en mujeres el gen recesivo necesita la presencia de dos copias del alelo defectuoso recesivo para que se exprese en el fenotipo hemofílico (es decir, las mujeres heterocigotas son portadoras de un alelo defectuoso pero no expresan la condición en el fenotipo), mientras que en los hombres la presencia de un sólo alelo defectuoso localizado en su único cromosoma X es suficiente para la expresión del fenotipo recesivo. En hombres, los genes ligados al cromosoma X son siempre heredados de la madre (los hombres heredan del padre el cromosoma Y). Finalmente, la herencia de caracteres ligados al cromosoma Y es muy rara porque los genes localizados en la región diferencial del cromosoma Y son escasos y estos genes solamente pueden ser trasmitidos de padres a hijos varones (ya que se encuentran en el cromosoma Y).

6 0
2 years ago
A mutation that involves one or a few nucleotides is called: mutagen,inversion,point mutation,translocation
Licemer1 [7]
The answer is point mutation
4 0
3 years ago
Two soil types allow easy root penetration?​
Delvig [45]

Answer:

dirt and soil

Explanation:

plants can grow in either tee hee

5 0
2 years ago
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