DNA : Its Structure and Functions

image of DNA

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

Cytoplasm Vs Cytosol: Definition, Functions and Differences

image of Cytoplasm-Vs-Cytosol

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. CytoplasmCytoplasm is bounded by the plasma membrane and contains the … Read more

Cell Nucleus: Definition, Structure and Functions

image of nucleus

The cell is the fundamental structural, biological and functional unit of living things. The typical cell contains the most outstanding visual and functional feature, the nucleus. The nucleus is the most prominent organelle which occupies about 10 % of the volume of the cell.The nucleus is the double membrane-bounded dense round cellular component which contains … Read more

Cell Wall: Structure and Functions

Image of Plant cell showing cell wall

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

Plasma Membrane: Structure and Functions

Fluid mosaic model of plasma membrane

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 term … Read more

Difference between Lysosome and Ribosome

image of Cell showing Ribosome and Lysosome

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 garbage … Read more

Difference between Plasma Membrane and Cell Wall

image of plant cell

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

Difference Between Prokaryotic and Eukaryotic Cell

image of Eukaryotic and Prokaryotic Cell

On the basis of internal structure, cells are of two types: Prokaryotic and Eukaryotic cells. Prokaryotic cells are simple and small in size while eukaryotic cells are complex and large in size. Eukaryotic cells have true nucleus and nucleolus with different types of membrane-bound cell organelles such as Endoplasmic reticulum, Golgi body, Mitochondria etc. Well … Read more

Difference Between Mitochondria and Chloroplast

The cell is the functional, structural and biological unit of all living organisms. It is of two types such as prokaryotic and eukaryotic cells. The cell contains many types of organelles, among them, some are typically solitary such as the nucleus and golgi complex, while others can be numerous such as mitochondria,  lysosomes, chloroplasts, etc. … Read more

Ribosome: Types, Structure and Functions

The ribosome is one of the essential membrane-bound organelles of the cells. It has tiny sphere-shaped structure. It contains protein and ribose nucleic acid (RNA) and provides space for protein synthesis.  It is found in the cytoplasm, mitochondrial matrix, and chloroplast. It is also found on the outer membrane of ER (endoplasmic reticulum) and nucleus. … Read more