Organelles are small structure within cells that perform dedicated functions. There are about a dozen types of organelles commonly found in eukaryotic cells. we will go through the basic facts about important cell organelles.
Nucleus
A prominent nucleus occurs in eukaryotic cells. In animal cells it is present in the center while in mature plant cells, due to the formation of large central vacuole, it is pushed to side. nucleus is bounded by a double membrane known as nuclear envelope. Nuclear envelope contains many small pores that enable it to act as a semi permeable membrane. Inside nuclear envelope a granular fluid nucleoplasm is present.
Nucleolus
is a dark spot and it is the site where ribosomal RNA are formed and assembled as ribosomes. chromosomes are visible ony during cell division while during interphase of cell they are in the form of fine thread like structures known chromatin. chromosomes are composed of DNA and proteins.
