Nucleolus contains

Ans. b (RNA). (Ref: Harper, Biochemistry, 25th ed., 8)CELL# A cell is composed mainly of cytoplasm, cell organelle and a nucleus.# Nucleus is made up of nucleoli.# Nucleus contain number of chromosomes packed together.# Genes are made up of DNA.# The entire genetic information contained in the genes is packaged in the chromosomes.# All the somatic cells of an individual organism contain the same number of chromosomes.# The genes are arranged linearly on the chromosomes and their positions on the normal chromosome in relation to other genes on the same chromosome are fixed. This position is called the locus.# Genes occupying the same locus on a pair of chromosomes are called alleles.# The highly methylated ribosomal RNA are packaged in the nucleolus C specific ribosomal proteins# The rRNA genes are located in the nucleoli of mammal on cells.