BOTANY

Cytoskeleton | Description, Structure, & its Function

Cytoskeleton | Description, Structure, & its Function

Cytoskeleton | Description, Structure, & its Function It is made up of extremely minute, fibers, filamentous, & tubular proteinaceous structures which form the structural framework inside the cell. The cytoskeleton occurs only in eukaryotic cells & is involved in many functions such as mechanical support, motility, maintenance, of the shape of the cell. Structure of …

Cytoskeleton | Description, Structure, & its Function Read More »

Ribosomes | Definition, Structure, Types & its Functions

Ribosomes | Definition, Structure, Types & its Functions

Ribosomes | Definition, Structure, Types & its Functions “Ribosomes are one of the most significant cell organelles composed of RNA and protein that transforms genetic code into chains of amino acids.” It is discovered by George Palade in 1953 in the animal cell. They were observed under electron microscope as dense particles present in the …

Ribosomes | Definition, Structure, Types & its Functions Read More »

Plastids | Definition, Structure, Types & its Functions

Plastids | Definition, Structure, Types & its Functions

Plastids | Definition, Structure, Types & its Functions Plastids are found in all plant cells & in euglenoids etc. These are easily observed in the microscope as they are large. Depending upon their colour & the pigments they contain, these are of three main types – leucoplasts, chromoplasts & chloroplasts. 1. Leucoplasts These are colourless …

Plastids | Definition, Structure, Types & its Functions Read More »

Mitochondria | Definition, Structure, and its Function

Mitochondria | Definition, Structure, and its Function

Mitochondria | Definition, Structure, and its Function These are cylindrical or sausage – shaped double membraned organelles distributed in the cytoplasm. They are not easily visible under the microscope. Thus, they are stained by a vital stain Janus green to make visible for observation. Mitochondria show a great degree of variability in their shape, size …

Mitochondria | Definition, Structure, and its Function Read More »

Endomembrane system - Definition, Structure and Examples

Endomembrane system – Definition, Structure and Examples

Endomembrane system – Definition, Structure and Examples Endomembrane system The eukaryotic cell is composed of many membrane bound organelles. Each of the membrane -bound organelles has a distinct function and structure. The organelles included in the endomembrane system are endoplasmic reticulum, Golgi complex, Lysosomes and vacuoles. Structure of Endomembrane System Types of Endomembrane System 1. …

Endomembrane system – Definition, Structure and Examples Read More »

Eukaryotic Cells - Definition, Characteristics, Structure

Eukaryotic Cells – Definition, Characteristics, Structure

Eukaryotic Cells – Definition, Characteristics, Structure Eukaryotic cells are those cells which process an organised nucleus with a nuclear envelope. Some of the important characteristics of eukaryotic cells are cytoskeletal structure, membrane- bound organelles and organisation of genetic material into chromosomes. These cells occur in protista, fungi, plants and animals. A eukaryotic cell like a …

Eukaryotic Cells – Definition, Characteristics, Structure Read More »

Prokaryotic Cells - Definition, Structure, Characteristics

Prokaryotic Cells – Definition, Structure, Characteristics

Prokaryotic Cells – Definition, Structure, Characteristics The prokaryotic cells are represented by bacteria, blue-green algas, mycoplasma and PPLO (pleuro pneumonia-like organisms).They are generally smaller in size and multiply much faster than the eukaryotic cells. They may vary greatly in shape and size but exhibit a similar basic cellular organisation. The organisation of the prokaryotic cell …

Prokaryotic Cells – Definition, Structure, Characteristics Read More »

Diagram showing different shapes of the cells

Cell | Definition, Types, Functions, Diagram & Cell Theory

Cell | Definition, Types, Functions, Diagram & Cell Theory Unicellular organisms are capable of Independent existence Performing the essential functions of life Anything less than a complete structure of a cell does not ensure independent living. Thus, cell is the fundamental structural and functional unit of all living organisms. Robert Hooke studied and discovered the …

Cell | Definition, Types, Functions, Diagram & Cell Theory Read More »