Dictionary » M » Modification

Modification

modification

1. A nonhereditary change in an organism; e.g., one that is acquired from its own activity or environment.

2. A chemical or structural alteration in a molecule.

behaviour modification, the systematic use of principles of conditioning and learning, especially operant or instrumental conditioning, to teach certain skills or to extinguish undesirable behaviours, attitudes, or phobias.

chemical modification, alteration in the structure of a molecule, typically a macromolecule such as a protein, by chemical means; often, the covalent addition by some reagent.

covalent modification, alteration in the structure of a macromolecule by enzymatic means, resulting in a change in the properties of that macromolecule; frequently, this type of modification is physiologically relevant.


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What makes dominant allele dominant?

... have from one to many alleles 2) it's not only about expression. The difference can be anywhere from transcription to protein post-translational modifications. There can be mutation in the promotor changing significantly expression. If the binding of ribosome will be impaired, there will be much ...

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by JackBean
Thu Feb 27, 2014 5:20 pm
 
Forum: Genetics
Topic: What makes dominant allele dominant?
Replies: 5
Views: 1084

Re: staphylococcus aureus and biofilm formation

A number of factors contribute to antibiotic resistance, genetic mutations can lead to the modification of the target for the antibiotic usually a protein (but not always) therefore making the antibiotic less effective. Other resistance factors include efflux systems ...

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by stopherlogic
Wed Aug 21, 2013 3:00 pm
 
Forum: Microbiology
Topic: staphylococcus aureus and biofilm formation
Replies: 2
Views: 2010

CHALLENGE: Why should there be an “origin of species”?

... experiment: http://myxo.css.msu.edu/index.html http://www.nature.com/nature/journal/v461/n7268/extref/nature08480-s1.pdf You are right about gene modification. However, it is insufficient to explain human evolution.

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by Cat
Sat Jun 29, 2013 7:14 pm
 
Forum: Evolution
Topic: CHALLENGE: Why should there be an “origin of species”?
Replies: 16
Views: 6124

Re: Re:

... Do you have citations? Also, your statement that "For human evolution to take place it would have had to be gene GAIN" is not true. Gene modification is also a path for evolution.

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by thoffnagle
Thu Jun 27, 2013 6:13 pm
 
Forum: Evolution
Topic: CHALLENGE: Why should there be an “origin of species”?
Replies: 16
Views: 6124

Creationism is not scientific

... 'There is tonnes of evidence for evolution which he ignores.' Which definition of 'evolution'? Change in gene frequency? Speciation? Descent with modification? Genetic drift? Any change in any living thing ever? The myth that the most complex thing man has ever obtained knowledge of (DNA) came ...

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by jinx25
Sat Nov 24, 2012 7:18 pm
 
Forum: Evolution
Topic: Creationism is not scientific
Replies: 24
Views: 13538
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