Mutations that alter a single nucleotide are called point mutations.

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#Id: 6284

#Unit 3. Fundamental Processes

Mechanism: How Polymerase Find Promoter Sequences

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#Id: 3712

#Unit 2. Cellular Organization

Ribosomal RNA is encoded by a large number of identical genes that are tandemly repeated to form one or more clusters called as rDNA cluster

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#Id: 4631

#Unit 13. Methods in Biology

Competitive ELISA. In this technique, antibody is first incubated in solution with a sample containing antigen. The antigen-antibody mixture is then added to an antigen coated microtiter well.
The more antigen present in the sample, the less free antibody will be available to bind to the antigen-coated well. 
Addition of an enzyme-conjugated secondary antibody (Ab2) specific for the isotype of the primary antibody can be used to determine the amount of primary antibody bound to the well as in an indirect ELISA. 
In the competitive assay, however, the higher the concentration of antigen in the original sample, the lower the absorbance.

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#Id: 5724

#Unit 10. Ecological Principles

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#Id: 2036

#Unit 8. Inheritance Biology

Generalized transduction Transduction in which any gene can be transferred from one bacterial cell to another by a virus.