The pre-miRNA liberated by Drosha is exported to the cytoplasm, where the second RNA cleavage reaction, performed by Dicer, takes place. As with Drosha, 

Dicer selects its cleavage sites using a measuring, rather than sequence-specific, mechanism.

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#Id: 3219

#Unit 3. Fundamental Processes

Transcribed genes are preferentially repaired when DNA damage occurs.

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#Id: 1057

#Unit 5. Developmental Biology

The gene encoding Tbx5 is transcribed in limb fields of the forelimbs.

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#Id: 7316

#Unit 12. Applied Biology

The bacterium Burkholderia dechlorinates the pesticide 2,4,5-T aerobically, releasing chloride ion (Cl-) in the process.

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#Id: 1230

#Unit 7. System Physiology – Animal

PTH stimulates renal 1α-hydroxylase.

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#Id: 8889

#Unit 2. Cellular Organization

Centrosomes contain γ tubulin, which forms specific ringlike complexes (γ TuRCs) that, have the ability to nucleate microtubules and form a bipolar spindle