The cell wall is the semi-rigid, laminated, semi-permeable non-living outermost cellulose coat which is positioned next to the cell membrane of the plant cells, Fungi, Algae, Bacteria, and some Archaea. The protoplasm of the plant cells is separated from the external world by the cell wall which is entirely lacking in animal cells. Generally, the … Read more
DNA is also known as deoxyribonucleic acid. German biochemist Frederich Miescher first observed DNA in 1869. He termed the material nuclein, which he isolated from pus cells that he collected from bandages discarded by a nearby clinic. Frederick Griffith realized that DNA might hold genetic information in 1928. Watson, Francis Crick, Maurice Wilkins, and Rosalind Franklin figured out the double helix … Read more
The cell is the fundamental structural, biological and functional unit of all living organisms. It is also known as building block of life. The numbers of cells vary from species to species. Each cell is enclosed by a membrane and composes of proteins and nucleic acids. In bacteria, fungi, algae and plant cell, the outer … Read more
The cell is the functional and structural unit of all living organisms. The eukaryotic cells are present both in the plants and animals. The cells have various shapes, sizes, and physiology. Each cell is composed of cell membrane, cytoplasm, different organelles , nucleus, and ergastic substances. Cytosol is the part of cytoplasm which contains over 70% … Read more
All types of cells are bounded by a thin, porous selectively permeable membrane which is known as the plasma membrane, cell membrane, plasmalemma or cytoplasmic membrane. It distinct the content of cell from the outside environment. Carl Nägeli and Carl Cramer first discovered the term cell membrane in 1855 while Janet Quentin Plowe given the … Read more
There are various cell organelles in the cell. They do many important functions inside the cell. Among the cell organelles, lysosomes are present in the eukaryotic cells while both prokaryotic and eukaryotic cells bear ribosomes. Lysosomes are bounded by membrane and different types of digestive enzymes are present here. It is also known as the … Read more