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Cell Organelles

By | 2015-07-06T01:05:05+00:00 March 24th, 2013|Cell Biology|

Brief introduction to cell organelles : Living beings are made up of cells. Some organisms consists of just single cell, while others are made up of trillions of cells. Each of these cells functions as a tiny factory, with its individual parts which work together to keep the cell alive and also in turn keep the organism going. These parts are called organelles.There are mainly two types or categories of cells: prokaryotic and eukaryotic cells. Both of these types of cells have a several things Read more [...]

Endocytosis and exocytosis

By | 2015-08-23T15:26:09+00:00 December 27th, 2012|Bulk transport through membranes|

At the cellular level, our body is an extremely busy place. Our cells creates energy, secrete chemicals, expels waste and many, many other functions along with them. Two important key functions in which our cells keep engaged are exocytosis and endocytosis. The definition of endocytosis and exocytosis are as follows: Exocytosis ‘“ the process through which a cell expels molecules and other large objects that are too large to pass through the cellular membrane Endocytosis ‘“ Read more [...]

Membrane transport

By | 2015-07-06T17:18:18+00:00 December 27th, 2012|Transport through cell membrane|

Membrane transport             According to the theory of cell, they are the main unit of organization in biology. Whether it’s a single cell or any giant with billions of cells, it’s still made of cells.All those cells are contained by a cell membrane that keeps the pieces bound inside. When you think of a membrane, imagine it is just like a big plastic bag with some of tiny holes. That bag keeps holding all of the cell pieces and their fluids inside the cell and keeps any nasty, Read more [...]

Cell membrane

By | 2015-08-23T15:40:56+00:00 December 27th, 2012|Cell organelles|

All prokaryotic and eukaryotic cells are enclosed by an elastic thin covering calledPlasma membrane.It is selective permeable membrane because it only allows specific substances to pass through.Eukayotic cells in addition possess intracellular membranes collectively called asCytoplasmic membrane.These membranes are collectively called as Biological membranes.    Cell membrane by Dhatfield (CC BY-SA) derived from work of LadyofHats Fluid mosaic model: Singer Read more [...]

Cell Wall

By | 2015-06-27T16:40:17+00:00 December 26th, 2012|Cell organelles|

The cells of all plants, bacteria and fungi have rigid,protective covering outside plasma membrane called "Cell wall".Cell wall is present in plant cells but its absent in animal cells.The cell wall was first observed by Robert Hooke in 1865 in cork cells.At beginning cell wall considered as unproductive but in later ages it was found that metabolically active and capable of growth and at least during its growth, contains protoplasmic material.Formation of cell wall:  During telophasic Read more [...]

Difference between prokaryotes and Eukaryotes

By | 2015-08-24T14:24:07+00:00 December 26th, 2012|Cell Biology|

Even though at very elemental level, all of the cells require the same functions to survive, yet the significant differences between prokaryotes and eukaryotes includes structural differences and in replication process. Most noteworthy is lack of nucleus in the bacteria and archaean – the two types of prokaryotic cells.Prokaryotes : Are almost similar Do not contain any membrane enclosed organelles Replicates via process of binary fission Lacks histones Read more [...]

Prokaryotes and Eukaryotes

By | 2015-08-24T14:33:12+00:00 December 26th, 2012|Cell Biology|

Prokaryotes and Eukaryotes Prokaryotes : Prokaryotes does not contains an organized nucleus. Their DNA is  the kind of floating around its cell. The DNA is clumped up, but not inside of the nucleus.Prokaryotes are single cell organisms. Most prokaryotes are bacteria and it is important to know that bacteria can do some amazing things. Although bacteria are very simple organisms, they can be found everywhere on the planet. It is also thinked by some scientists Read more [...]

Difference between plant cell and animal cell

By | 2015-08-24T14:38:39+00:00 December 26th, 2012|Cell Biology|

Key Difference : Animal cells doesn’t contains rigid cell walls and the chloroplasts, and also they have smaller vacuoles. While plant cells have a rigid cell wall, have chloroplasts and have a much larger central vacuole.Cells are smallest unit of life and microscopic by nature, which means we cannot see them with our naked eye. These cells were discovered in 1665 by the Robert Hooke and were named after the small “cells” (or rooms) in a monastery. There are basically two types of Read more [...]

Cell?

By | 2015-08-23T15:31:35+00:00 December 26th, 2012|Cell Biology|

What is Cell? CELL is the structural and functional unit of all living organisms. Each and every organism on Earth is divided into cells. It is the smallest and basic structural unit of all organism. You can think a cell of a small compartment that keep holds all the biological equipments necessary to keep an organism alive and successful. Living things may be either single celled or they can be very much complex, for instance human being – the most complex living creature, yet made Read more [...]