jueves, febrero 01, 2007

Biografia de James Watson


Bioquímico y genetista norteamericano, nacido en Chicago (Ill.). Tras graduarse en zoología por la Universidad de Chicago (1947) y doctorarse por la Universidad de Indiana (1950), donde se interesó por los efectos producidos por los rayos X sobre la multiplicación de los bacteriófagos, James Dewey Watson prosiguió sus estudios en el Consejo Nacional de Investigación de Copenhague (1950-51), donde se realizaban investigaciones sobre la estructura de las grandes moléculas biológicas.
En un simposio celebrado en Nápoles en 1951, Watson tuvo un encuentro con Wilkins y vio por primera vez el modelo estructural del ADN (ácido desoxirribonucleico) obtenido con la técnica de difracción de rayos X, lo que le llevó a interesarse por la química estructural de los ácidos nucleicos.
En Cambridge colaboró con Crick en la investigación de la estructura del ADN y en 1953 adelantó que los componentes esenciales de este ácido -cuatro bases orgánicas- debían estar enlazados por pares: adenina con timina y guanina con citosina. Así pudo postular con Crick el modelo molecular de doble hélice para el ADN, en que una molécula podía duplicarse, puesto que las dos cadenas de la hélice eran complementarias.

James Dewey Watson trabajó luego en el Instituto Tecnológico de California, en Pasadena (1953-55) y en la Universidad de Harvard, donde llegó a ser profesor de bioquímica y biología molecular (1961). Finalmente ayudó a descifrar el «código genético» contenido en las secuencias del ADN y descubrió el ARNm (ácido ribonucleico mensajero), que transfiere el código ADN a las estructuras celulares formadoras de proteínas.

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Anonymous Carlos Norberto Mugrabi said...

Últimos Avances en Genética

En respuesta al genetista James Watson





LOS[1] blancos menos inteligentes, son menos inteligentes que LOS negros más inteligentes.



LOS negros son menos inteligentes que LOS negros más inteligentes.



Ah; conozco, por una parte, a un negro y, por otra, a un blanco que -a decir verdad- uno parece más inteligente que el otro.



Prosiguiendo:



LOS blancos inteligentes -aquellos que sean inteligentes- son más inteligentes que aquellos negros que sean menos inteligentes: excepto el Débil Mental y Premio Nóbel que dijo la maldad que motiva estas inteligentes reflexiones mías –modestia aparte-.



Podría seguir razonando inteligentemente, y extraer otras conclusiones, estrictamente lógicas y no antagónicas con la moderna genética. Pero no tengo ganas.



No obstante, la pregunta inteligente –según logro inteligir- sería:



¿Qué viene a ser la Inteligencia?



¡Bienvenidas vuestras inteligentes respuestas! Web Blog Log





--------------------------------------------------------------------------------

[1] Generalización que suele ser poco inteligente.

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