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انجمن صنفی کارفرمایی داروخانه های دامپزشکی خراسان رضوی - ویروس ها عامل پیدایش حیات

ویروس ها عامل پیدایش حیات

نویسنده :انجمن صنفی
تاریخ:چهارشنبه 29 دی 1395-12:33 ب.ظ

ویروس ها عامل پیدایش حیات

نویسنده :عرفان
تاریخ:چهارشنبه 29 دی 1395-09:24 ق.ظ




براساس نظریه ای جدید، محققان معتقدند ویروس ها در تشکیل سلول های بدن انسان نقشی حیاتی داشته اند.

 بیشتر انسان ها  تصور می کنند ویروس ها عامل بیماری و درحقیقت هیولاهایی هستند که به سلول ها آسیب می رسانند. اما محققان دانشگاه  سانتاباربارا در کالیفرنیا معتقدند این موجودات در تشکیل سلول های بدن انسان نقشی حیاتی داشته اند.

  اخبارعلمی ,خبرهای  علمی ,ویروس ها عامل پیدایش حیات

 

دانشمندان رفتار باکتریوفاژها (نوعی ویروس) که میزبان خود را تصرف و نابود می کنند را مورد بررسی قرار دادند.

 

آنها متوجه شدند این ویروس ها قبل از مرگ، کنترل سلول های خود را به عهده گرفته و  فضایی برای جداسازی مواد ژنتیکی ویروسی ایجاد می کنند.

 

برخی دانشمندان معتقدند سلول های انسان با همین شیوه دارای هسته شدند. «ووراپون چایکراتیساک» مولف اصلی این تحقیق می گوید: این مشاهدات برای نخستین مرتبه انجام شده است.

 

 هرچند این نتایج نشان دهنده مثال دیگری شیوه عملکرد ویروس ها است. اما از نظریه ای پشتیبانی می کند که «یوکاریوجنسیس ویروسی» نام دارد. براساس این نظریه ویروس ها به همین شیوه ای که توضیح داده شد، دارای هسته می شوند.

 

درهمین راستا دانشمندان معتقدند این نتایج نقش مهمی از درک چگونگی تشکیل حیات از ارگانیسم های ساده به نمونه پیچیده تر و اشکال مختلف حیات در سراسر زمین دارد.  






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