Dictionary » P » Precursor

Precursor

precursor

Something that precedes.

1. (Science: biochemistry) In biological processes, a substance from which another, usually more active or mature substance is formed.

2. In clinical medicine, a sign or symptom that heralds another.

Origin: L. Praecursor = a forerunner


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Biology is not a science

... circumstances of groups of scientists rather than on their adherence to a specific, definable method. In this regard, Kuhn is considered a precursor to the more radical thinking of Paul Feyerabend. Kuhn's work has also been regarded as blurring the demarcation between scientific and non-scientific ...

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by gamila
Wed Jul 29, 2009 2:50 pm
 
Forum: General Discussion
Topic: Biology is not a science
Replies: 44
Views: 1364

Re: What are microspheres and coacervates?

... and coacervates form due entirely to chemical processes. No life is required. This makes them possible contenders in the formation of the first precursor to true life as structures to enclose the earliest protocell. Note that the word microsphere has many meanings, including lots of different ...

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by skeptic
Tue May 05, 2009 9:20 am
 
Forum: Evolution
Topic: What are microspheres and coacervates?
Replies: 2
Views: 595

Re: An evolutionary race

... once were a part of assorted viruses. Retroviruses incorporate their genes into the nucleus of a cell. If the cell they do this to is a gamete precursor, the virus gene may end up in a sperm or ovum. If it becomes a new organism, the gene is then passed down indefinitely. We all, thus, have ...

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by skeptic
Tue Apr 14, 2009 3:09 am
 
Forum: Microbiology
Topic: An evolutionary race
Replies: 3
Views: 415

Multiple names for everything!

I think that myeloblast is a precursor for myelocyts, which means that myelocyts are formed from myeloblasts...

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by miloshic
Sat Jan 10, 2009 7:38 pm
 
Forum: Human Biology
Topic: Multiple names for everything!
Replies: 1
Views: 381

Converting Glucose to Fat or ATP?

... of Fatty Acid Synthase, promotes the inactive conformation of Acetyl-CoA Carboxylase (diagram above), diminishing production of malonyl-CoA, the precursor of fatty acid synthesis. This is an example of feedback inhibition. * Citrate allosterically activates Acetyl-CoA Carboxylase. Citrate concentration ...

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by MrMistery
Sun Dec 14, 2008 3:48 pm
 
Forum: Cell Biology
Topic: Converting Glucose to Fat or ATP?
Replies: 12
Views: 1837
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