Category: Ch 5 – The Fundamental Unit Of Life

Chromosomes are the genetic material present in the nucleus. It contains DNA with associated proteins. They are present as threads called chromatin. During the growth phase of the cell, the chromatin condenses into a much thicker structure called a chromosome. Human cells contain 23 pairs of chromosomes (46). Chromatin Chromatin is a thread-like structure which serves as the…

The nucleus is the processing unit of the cell. It is a double membrane-bound organelle which contains the genetic material for inheritance. The nuclear membrane contains pores that allow the transfer of materials from the nucleus to the cytoplasm. The nucleus is the brain of the cell as it controls various functions such as cell…

Osmosis is the movement of water across a semi-permeable membrane. Osmosis is a selective process since the membrane does not allow all molecules to pass through it. Water is usually the only free flowing molecule across this membrane. Isotonic, hypotonic solutions, hypertonic solutions Isotonic solutions are those which have the same solute and pH concentration…

Prokaryotic & Eukaryotic cells Two types of cell; Prokaryotic and Eukaryotic cells. Prokaryotic cells are primitive and lack well defined nucleus. Eukaryotic cells are more advanced and have well defined nucleus. Cell structure in Eukaryotic cells Eukaryotic cells have the most well defined structure. These cells have cell membrane, membrane bound cell organelles and a…

Life, as we know it, took billions of years to evolve. From the very first precursor of life to the multitude of multicellular organisms that we see around us today, the most basic unit of all these is the cell. All About Cells Cells are the basic structural and functional unit of life. Cell was…