
|
|
Dictionary » C » Cell CellDefinition noun (Science: Cell Biology) 1. The structural, functional and biological unit of all organisms. 2. An autonomous self-replicating unit that may exist as functional independent unit of life (as in the case of unicellular organism), or as sub-unit in a multicellular organism (such as in plants and animals) that is specialized into carrying out particular functions towards the cause of the organism as a whole. 3. A membrane bound structure containing biomolecules, such as nucleic acids, proteins, and polysaccharides.
There are two distinct types of cells: prokaryotic cells (e.g. bacterial cells) and eukaryotic cells (e.g. plant or animal cell). The main difference between the two is a well-defined nucleus surrounded by a membranous nuclear envelope present only in eukaryotic cells. Despite this difference they share a number of common features: the genetic information is stored in genes, proteins serve as their main structural material, ribosomes are used to synthesize proteins, adenosine triphosphate is the main source of metabolic energy to sustain various cellular processes, and a cell membrane that controls the flow of substances into and out of the cell.
![]()
Please contribute to this project, if you have more information about this term feel free to edit this page ![]()
Results from our forumRe: Any SOLID arguments against evolution?... can think this way. Alex, first of all who are you to judge me, and my faith. How is it that because I believe in the unseen hand of God in the cell that my faith is weak. Even if it is explained further, I still see it as a miracle. It is something that no man can design. But then the people ...
See entire post
Re: Natural selection wrong due to transmission of harmful genes... few years ago and she is doing just fine living with her aunt. which occur in about one in every 200 births. Examples are cystic fibrosis, sickle-cell anemia, Sickle cell anemia helps people to survive against malaria. as a younger woman, you start out with a much lower risk of breast cancer to ...
See entire post
Natural selection wrong due to transmission of harmful genes... “There are more than 6,000 known single-gene disorders, which occur in about one in every 200 births. Examples are cystic fibrosis, sickle-cell anemia, Huntington's disease, and hereditary hemochromatosis” The study, led by a pediatrician and medical geneticist at the University of North ...
See entire post
Homework question that I must be over-thinking.A lot of science is stream-of-consciousness. If you expected the grasshopper cells to be smaller because grasshoppers are smaller, but the cells were the same size, do you leap to the hypothesis that size-of-organism doesn't matter to cell size, or did the teacher ...
See entire post
malariaThe sickle-allele hemoglobin is "sickled" when not attached to oxygen. Infection of an RBC by malaria parasites deoxygenates the cell, sickles those hemoglobins (in heterozygotes, who have a decent percentage of sickle-cell hemoglobins in each cell), and the cell is processed as defective ...
See entire post
This page was last modified 12:41, 16 June 2008. This page has been accessed 88,064 times. |
© Biology-Online.org. All Rights Reserved.
Register | Login
| About Us | Contact Us | Link to Us | Disclaimer & Privacy
Science Network - Braintrack.com - University Directory | Chemicool.com - Chemistry