CUET biology

NUCLEOLUS AND RIBOSOMAL RNA GENES

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Nucleolus Evolution Number and Structure Structure Morphologically nucleolus consists of three regions: Fibrillar regions:  Granular regions :  Protein region:  Chromatin part:   Perinucleolar Chromatin: Intranucleolar chromatin:  Functions: Chemical Composition of nucleolus: Function of Nucleolus: Ribosomal RNA Genes Fig  Biogenesis of ribosomes MCQ 🧪 PART A: Simple Conceptual MCQs (1–30) 1. Who discovered the nucleolus? A. Robert … Read more

CHROMOSOMAL ORGANISATION

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CHROMOSOMAL ORGANISATION (Chroma-color, soma-body) Chromosome Numbers At the time of gametes formation, their number remains half (N), that becomes 2N again after fertilization. Eukaryotic Chromosome Organization The following material are present in the Eukaryotic Chromosome 1.DNA RNA Protein Two types of proteins are present in chromosomes. 1- Histone protein 2- Non – Histone protein 3- … Read more

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