কোষচক্রে S দশা সৃষ্টি হয় কেন - Time Of BD - Education Blog

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কোষচক্রে S দশা সৃষ্টি হয় কেন

Safwan Alam

April 21, 2021

কোষচক্রেS- দশা সৃষ্টি হয় কেন

উত্তর : এ দশাটি সৃষ্টি না হলে কোষ বিভাজন সম্ভব নয় । এ দশায় বিভিন্ন হিস্টোন প্রােটিন সংশ্লেষণ হয় যা DNA- র সাথে মিলে নিউক্লিওজোম গঠন করে এবং এ দশায় অন্যান্য প্রােটিন সংশ্লেষণ বজায় থাকে । প্রাণীকোষ ও কিছু নিম্নশ্রেণির কোষে S দশায় ( ক্ষেত্রবিশেষ G2 ) সাইটোপ্লাজম - এ সেন্ট্রিওল এর দ্বিত্বকরণ ( Duplication ) ঘটে । S- দশাকে M দশার অদৃশ্য ( Invisible phase ) বলা হয় কারণ এ দশায় ক্রোমােসােমের প্রতিলিপিকরণ ও ক্রোটিড গঠন প্রক্রিয়া সম্পন্ন হয় ।

Tag:কোষচক্রে S দশা সৃষ্টি হয় কেন

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