Difference between revisions of "Cell"
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=== What is the source of energy for a cell? === | === What is the source of energy for a cell? === | ||
The [[energy]] of the cell comes from an [[organelle]] called [[mitochondrion]], which produces [[adenosine triphosphate|ATP]] by [[glycolysis]]. ATP breaks down to [[adenosine diphosphate|ADP]] by [[hydrolysis], losing a phosphate group and thus releasing and energy. | The [[energy]] of the cell comes from an [[organelle]] called [[mitochondrion]], which produces [[adenosine triphosphate|ATP]] by [[glycolysis]]. ATP breaks down to [[adenosine diphosphate|ADP]] by [[hydrolysis], losing a phosphate group and thus releasing and energy. | ||
| − | ATP+ | + | |
| + | ATP+H<sub>2</sub>O→ADP+P<sub>i</sub>+Energy | ||
| + | |||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 14:15, 31 October 2016
Contents
Explanation
The cell is the most basic and fundamental building block of life on Earth that undergoes cell growth and cell division to replicate itself. The cell consists of a cell wall and a protective semipermeable membrane, protecting the cytoplasm of the cell along with the cell nucleus. They are classified as prokaryote that has no cell nucleus and Eukaryote that have one.
Frequently Asked Questions
Where did the first cell come from?
As of today, there are no answers for the actual mechanism of abiogenesis. There are several hypotheses that advocate that the first cell or protocell could have been formed out of a primordial RNA world.[1][2]
What is the source of energy for a cell?
The energy of the cell comes from an organelle called mitochondrion, which produces ATP by glycolysis. ATP breaks down to ADP by [[hydrolysis], losing a phosphate group and thus releasing and energy.
ATP+H2O→ADP+Pi+Energy
References
- ↑ Schrum, J. P., Zhu, T. F., & Szostak, J. W. (2010). The Origins of Cellular Life. Cold Spring Harbor Perspectives in Biology, 2(9), a002212. http://doi.org/10.1101/cshperspect.a002212
- ↑ Alberts B, Johnson A, Lewis J, et al. Molecular Biology of the Cell. 4th edition. New York: Garland Science; 2002. The RNA World and the Origins of Life. Available from: https://www.ncbi.nlm.nih.gov/books/NBK26876/