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Topic: Chemotroph

	Chemotroph - Wikipedia, the free encyclopedia
		Chemotrophs are organisms that obtain energy by the oxidation of electron donating molecules in their environments.
		The chemotroph designation is in contrast to phototrophs which utilize solar energy.
		Chemoautotrophs (or chemotrophic autotroph), in addition to deriving energy from chemical reactions, synthesize all necessary organic compounds from carbon dioxide.
	en.wikipedia.org /wiki/Chemotroph (205 words)

	Primary nutritional groups (Site not responding. Last check: 2007-10-30)
		The basis for energy metabolism of most chemotrophic organisms are oxidation-reduction reaction s in which electrons move from an electron donor to an electron acceptor.
		Therefore, compounds used as electron donors by chemotroph s must be diverted into both energy-yielding oxidative pathways and biosynthetic reductive pathways.
		The range of possible pairs of electron donors and acceptors for chemotrophs is limited to those whose reaction is exergonic enough to conserve enough energy for the transition of at least one proton over a membrane (equals to -15 to -20 kJ/mol).
	www.serebella.com /encyclopedia/article-Primary_nutritional_groups.html (1399 words)

	chemotroph Information Center - name the type of chemotroph
		Most are bacteria chemotrophs or archaea that live in hostile environments such as deep sea vents and are the primary producers in such ecosystems.
		Scientists believe that the first organisms to inhabit Earth were chemoautotrophs that produced oxygen name the type of chemotroph as a by-product and later evolved into both aerobic, animal-like organisms and photosynthetic, plant-like organisms.
		The names of these primary nutritional groups are built from Greek roots.
	www.scipeeps.com /Sci-Biochemistry_Topics_Ch_-_Co/chemotroph.html (183 words)

	autotroph
		Organisms that use light for the energy to synthesize organic compounds are called photosynthetic autotrophs; organisms that oxidize such compounds as hydrogen sulfide (H
		S) to obtain energy are called chemosynthetic autotrophs, or chemotrophs.
		Chemotrophs include the iron bacteria, the nitrifying bacteria, and the nonpigmented sulfur bacteria (see
	www.factmonster.com /ce6/sci/A0805420.html (189 words)

	Lecture Notes MCB 229. Symbioses. Microbiota. (Site not responding. Last check: 2007-10-30)
		An example of "Phototrophic Consortia": associations of green sulfur bacteria that surround a central chemotrophic bacterium.
		Recent evidence suggests that such consortia may be the most common form of green sulfur bacteria in some aquatic systems.
		One bacterium is found at the center of the consortium, probably a chemotroph that is carrying out anaerobic respiration, using SO as an electron acceptor and producing H
	sp.uconn.edu /~terry/229sp03/lectures/symbioses.html (1821 words)

	Re: Life on Mars Likely, Scientist Claims (Site not responding. Last check: 2007-10-30)
		Given the extreme tolerance of various species and the ability of some of them to hibernate through cold conditions as well, the entire idea doen't seem that far fetched.
		I wonder if life originates deep underground, as an lithotroph or chemotroph, then branches out if possible to colonize the surface of its environment - and evolve into new forms.
		Its far safer underground, and any impactors could spread any such hardy forms a very long way.
	uplink.space.com /printthread.php?Cat=&Board=sciastro&main=16789&type=post (209 words)

	The Endosymbiotic Theory, OR Eukaryotic and Prokaryotic Feast
		They should be familiar with the following terms: prokaryote, eukaryote, heterotroph, autotroph, chemotroph, mitochondria, and chloroplast.
		Ask, "What may have developed from a prokaryote ingesting a chemotroph?" A mitochondrion.
		"Why?" Some event may have occurred to keep the chemotrophic organism alive inside the prokaryote.
	www.accessexcellence.org /AE/AEPC/WWC/1995/prokfeast.html (558 words)

	Chemotroph - ENCYCLOPEDIA - The History Channel UK
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	thehistorychannel.co.uk /site/search/search.php?word=CHEMOTROPH&... (154 words)

	Review Questions Chapter 6 (Site not responding. Last check: 2007-10-30)
		Organisms can also be classified based on their energy source and carbon source.
		Describe the meaning of each of the following: phototroph, chemotroph, autotroph, heterotroph, photoautotroph, photoheterotroph, chemoautotroph, chemoheterotroph.
		List 4 chemical compounds that are needed by all microorganisms
	www.mindspring.com /~smocpg/Chapter67.htm (400 words)

	deep sea vents
		Although most of the deep sea is sparsely populated, vent sites teem with a fascinating array of life.
		… Chemotroph communities are clustered very tightly around deep-sea hydrothermal vents.
		Water seeps down into the ocean floor where …
	www.alpha-int.com /deep-sea-vents.html (384 words)

	A Dictionary of Ecology: chemotroph @ HighBeam Research (Site not responding. Last check: 2007-10-30)
		A Dictionary of Ecology: chemotroph @ HighBeam Research
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	www.highbeam.com /doc/1O14:chemotroph/chemotroph+.html?refid=ip_hf (61 words)

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