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Nucleus: Chemical constituents
Chemical constituents of Nucleus Nucleus is called apparatus of heredity. It is the largest extractoplasmic component of cell which contains all the genetic information to control morphology, function and heredity. It is called control room / director/heart of cell. A nucleus in metabolic phase (nondividing phase) I phase is called interphase nucleus. It is not an organelle of cell but component of protoplasm or called extractoplasmic organelle . Nucleus has DNA 9-12 % , RNA 5 % , Lipids 3 % and Ca , Mg , Mn , Na , P , Fe and K , 80 % proteins (65 % acidic non-histone which have height mol. wt., rich in tyrosine and tryptophan, forms enzymes, and helps in transciption of dNA to form RNA ; 15 % proteins are basic like, histone proteins of low mol. wt ., rich in lysine and arginine), DNA : histone ratio is roughly 1 : 1 . Histones neutralize acidity of nucleic acid and prevent transcription of dNA . Histones are structural proteins and suppress genes . Non- histones are functional ...
Pontederia crassipes (formerly Eichhornia crassipes)
Scientific Name :Pontederia crassipes (formerly Eichhornia crassipes) Family: Pontederiaceae
Quadrate Analysis for SEM 6 program
Make two qualitative and two quantitative data sheets on forest cover from the supplied table of the next page . [ Quantitative data sheet ( Quantitative characters : Habit and Colour of Flower - 3 ; Qualitative data sheet ( Qualitative characters : Frequency and Density -5 ; ] [ গুণগত তথ্য তালিকা ( গুণগত বৈশিষ্ট্যাবলি, গাছের প্রকৃতি ও ফুলের রং ) - 3 , পরিমাণগত তথ্য তালিকা ( পরিমাণগত বৈশিষ্ট্যাবলি : উদ্ভিদ প্রজাতির সংঘটন ও ঘনত্ব ) -5 )
