Most mRNAs decay stochastically (like the decay of radioactive isotopes), and as a result mRNA stability is usually expressed as a half- life (t½).

TLS Online TPP Program

#Id: 1319

#Unit 4. Cell Communication and Cell Signaling

The heterotrimeric G protein coupled to rhodopsin, called Transducin.

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#Id: 436

#Unit 2. Cellular Organization

The four core histones are present in equal amounts in the cell. H1 is half as abundant as the other histones, which is consistent with the finding that only one molecule of H1 can associate with a nucleosome.

TLS Online TPP Program

#Id: 810

#Unit 3. Fundamental Processes

The 12-bp promoter sequence need not be contiguous. 

If a specific number of base pairs separates two constant shorter sequences, their combined length could be less than 12 bp, because the distance of separation itself provides a part of the signal (usually 16-17 bp)

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#Id: 1053

#Unit 5. Developmental Biology

Hox11 paralogues specify the zeugopod

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#Id: 8281

#Unit 1. Molecules and their Interaction Relevant to Biology

In absence of water the magnitude of the charge–charge interaction is significantly greater.