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Molecular and cellular biology portal
Welcome to the Molecular and cellular biology portal.
Molecular biology is the study of biology at the molecular level. The field overlaps with other areas of biology and chemistry, particularly genetics and biochemistry. Cell biology studies the properties of cells including their physiological properties, their structure, the organelles they contain, interactions with their environment, their life cycle, division and death. Molecular and cellular biology are interrelated, since most of the properties and functions of a cell can be described at the molecular level.
Molecular and cellular biology encompass many biological fields including:
biotechnology, developmental biology, physiology, genetics and microbiology.
are Enzymes proteins that catalyze (i.e. accelerate) chemical reactions. Enzymes are biochemical catalysts. In these reactions, the molecules at the beginning of the process are called substrates, and the enzyme converts these into different set of molecule(s), the product(s). Almost all processes in the cell need enzymes in order to occur at significant rates. Since enzymes are extremely selective for their substrates and speed up only a few reactions from among many possibilities, the set of enzymes made in a cell determines the biochemistry and signal transduction that occur in a cell.
Ribozyme is an RNA molecule that can catalyze a chemical reaction just like enzymes and may pre-date them? ...that several groups have managed to add
non-natural bases to DNA, while others have added non-natural amino acids into the genetic code? ...that
Deinococcus radiodurans is one of the most radioresistant organisms known, while some fungi survive by harnessing the energy from radiation? ...that the
cytoskeleton of a cell acts like a tensegrity model , such that a cell can resist shear, compression and tension. ...that eggs laid by the
Ostrich can weigh 1.3 kg and the contained yolk is the largest single cell of any organism? ...that
Red blood cells have an average life span of 120 days? ...that Red blood cells do not contain the
genetic material needed to synthesize new proteins or undergo cell division? ...that
Robert Hooke coined the biological term -- so called because his observations of plant cells reminded him of cell monks' cells which were called "cellula"?
Molecular and cellular biology news
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Expert attention needed: Molecular and Cellular Biology articles
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Attention: Cell division, Cell membrane, G0 phase
Expand: Calcium signaling, Embryogenesis, Gamete, Hematopoesis, Lipid signaling
Merge: Germ layer
Cleanup: Cell, DNA
Requests: Chimeric DNA, protocadherin, RuBisCO activase, PEP carboxylase more...
Stubs: Molecular and cellular biology stubs; Biochemistry stubs; Cell biology stubs; Developmental biology stubs; Genetics stubs
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Branches of Molecular and cellular biology
To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection.
, Jules Henri Poincaré La Science et l'Hypothèse (Of Science and Hypotheses) (1901)
Molecular and cellular biology topics
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