https://padlet.com/mariyadavist/270029r9t98iz8x2 Standard 8 en-us 2022-05-31 03:12:29 UTC 2026-03-26 03:23:09 UTC hello@padlet.com https://cdn.shopify.com/s/files/1/1027/4949/products/BM0114_1200x1200_crop_center.jpg?v=1571438814 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205389397 Electron Microscope ]]> 2022-05-31 03:18:12 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205389397 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205390773 Gandhiji observing through a microscope ]]> 2022-05-31 03:19:26 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205390773 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205391730 Milestones in the history of Biology ]]> 2022-05-31 03:20:22 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205391730 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205392808 How to prepare an observation material ]]> 2022-05-31 03:21:22 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205392808 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205393194 2022-05-31 03:21:45 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205393194 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205393728 Plant cell]]> 2022-05-31 03:22:16 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205393728 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205394403 Structure of Nucleus ]]> 2022-05-31 03:22:52 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205394403 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205397442 Cell organelles ]]> 2022-05-31 03:25:41 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205397442 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205403420 Questions and answers of textual problems ]]> 2022-05-31 03:31:10 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205403420 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205414619 Protoplasm and Cytoplasm ]]> 2022-05-31 03:42:10 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205414619 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205415578 Protoplasm ]]> 2022-05-31 03:43:11 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205415578 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205418205 Textbook ]]> 2022-05-31 03:45:55 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205418205 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205419764 Cheek cell under microscope ]]> 2022-05-31 03:47:42 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205419764 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205420891 Plastids]]> 2022-05-31 03:48:53 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205420891 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205423213 Animal cell vs Plant cell]]> 2022-05-31 03:51:13 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205423213 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205425794 Prokaryotes and Eukaryotes ]]> 2022-05-31 03:53:56 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205425794 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205429430 Cell Theory

In biology, cell theory is a scientific theory first formulated in the mid-nineteenth century, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells. Cells are the basic unit of structure in all organisms and also the basic unit of reproduction.


Human cancer cells with nuclei (specifically the DNA) stained blue. The central and rightmost cell are in interphase, so the entire nuclei are labeled. The cell on the left is going through mitosis and its DNA has condensed.
The three tenets to the cell theory are as described below:

All living organisms are composed of one or more cells.
The cell is the basic unit of structure and organization in organisms.
Cells arise from pre-existing cells.
The theory was once universally accepted, but now some biologists consider non-cellular entities such as viruses living organisms,[1] and thus disagree with the first tenet. As of 2021: "expert opinion remains divided roughly a third each between yes, no and don’t know".[2] As there is no universally accepted definition of life, discussion will continue.]]> 2022-05-31 03:57:58 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205429430 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205436136 Different Cell Organelles and their Functions

Organelles make up the subunits of a cell.  There are numerous each with their own function. 
Plasma Membrane
The plasma membrane is the organelle that encapsulates the contents of the cell. Apart from encapsulating cell contents, the plasma membrane also plays a vital role in regulating the movement of substances in and out of the cell.
As such, it is actively involved in such both passive and active transportation to and from the cell. These processes also help maintain balance even when conditions outside the cell change.
The plasma membrane is made up of two layers of phospholipids (phospholipids bilayer).
Nucleus
* Some of the main components of the nucleus include the chromatic, nucleoplasm/nuclear sap and the nucleolus.
* The nucleus houses DNA (the hereditary material) as well as various proteins and the nucleolus.
In eukaryotic cells, the nucleus is enclosed in a nuclear membrane. It is the organelle that controls the hereditary traits of an organism by directing such processes as protein synthesis and cell division among others.
For prokaryotes, the DNA lacks a nuclear membrane. The genetic material is therefore bound in the nucleotide region.
* The nucleolus plays an important role in ribosome production.
Ribosome
Ribosomes are tiny organelles that contain RNA and specific proteins within the cytoplasm. Within the cell, ribosomes are directly involved in the manufacture of proteins by using their RNA and amino acids.
This process involves decoding the information contained in the mRNA and using amino acids to produce the required proteins.]]> 2022-05-31 04:03:44 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205436136 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205441059 Biomembranes

A biological membrane, biomembrane or cell membrane is a selectively permeable membrane that separates cell from the external environment or creates intracellular compartments. Biological membranes, in the form of eukaryotic cell membranes, consist of a phospholipid bilayer with embedded, integral and peripheral proteins used in communication and transportation of chemicals and ions. The bulk of lipid in a cell membrane provides a fluid matrix for proteins to rotate and laterally diffuse for physiological functioning. Proteins are adapted to high membrane fluidity environment of lipid bilayer with the presence of an annular lipid shell, consisting of lipid molecules bound tightly to surface of integral membrane proteins. The cell membranes are different from the isolating tissues formed by layers of cells, such as mucous membranes, basement membranes, and serous membranes.]]> 2022-05-31 04:08:52 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205441059 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205444902 In to the cell

]]> 2022-05-31 04:12:13 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2205444902 mariyadavist https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2208574556 Plastids]]> 2022-06-02 06:40:47 UTC https://padlet.com/mariyadavist/270029r9t98iz8x2/wish/2208574556