In addition to the fluence, some phytochrome responses are sensitive to the irradiance, 2 or fluence rate, of light. The units of irradiance in terms of photons are moles of quanta per square meter per second (mol m–2 s–1).

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#Id: 2275

#Unit 3. Fundamental Processes

The subunits of RNA Polymerases

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#Id: 7161

#Unit 5. Developmental Biology

The mechanism for “bottom-up” specification of germ layers of the frog embryo resides in a set of mRNAs that are tethered to the vegetal cortex

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#Id: 744

#Unit 3. Fundamental Processes

free energy for this reaction is rather small (DG–3.5 kcal/mol).

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#Id: 2984

#Unit 13. Methods in Biology

The unit of s is seconds Most values of s are between 10-13 and 10-11 second. To
eliminate the exponents, the value of s is usually reported in svedbergs (S). 1 svedberg 10-13 second.

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#Id: 2273

#Unit 3. Fundamental Processes

The lac promoter along with the bulk of other E. coli promoters, is recognized by RNA polymerase bearing the σ70 subunit.