In BER, The nick remaining after DNA polymerase I has dissociated is sealed by DNA ligase.

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#Id: 1668

#Unit 4. Cell Communication and Cell Signaling

Live, Attenuated Vaccines Microorganisms can be attenuated or disabled so that they lose their ability to cause significant disease but retain their capacity for transient growth within an inoculated host.

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#Id: 9965

#Unit 4. Cell Communication and Cell Signaling

Noncanonical pathways can be divided into two types: 

1. The “planar cell polarity” pathway

2. The “Wnt/calcium” pathway

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#Id: 6723

#Unit 8. Inheritance Biology

Transformation

Bacterial viruses (bacteriophages) carry DNA from one bacterium to another.

It takes place between same or closely related species.

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#Id: 382

#Unit 2. Cellular Organization

H3 and H4 histones first form heterodimers that then come together to form a tetramer with two molecules each of H3 and H4. While H2A and H2B form heterodimers in solution but not tetramers. This assembly without DNA called Histone-only Intermediates 

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#Id: 916

#Unit 13. Methods in Biology

Propidium iodide is a fluorescent dye with a flat, planar structure that slides between the rungs of (or intercalates into) the DNA ladder in a quantitative manner frequently used in FACS.