In the absence of light,  bound 11-cis-retinal locks the rhodopsin into its inactive (R) conformation

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#Id: 9514

#Unit 6. System Physiology – Plant

Quorum sensing in Erwinia carotovora is mediated by N‐acylhomoserine lactones, small molecules released from the bacterial cells into the surrounding medium.

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#Id: 9282

#Unit 6. System Physiology – Plant

Plant genes expressed early, or in the absence of bacterial infection, are termed “early nodulins” or ENOD

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#Id: 9125

#Unit 10. Ecological Principles

Parasites can be classified

Microparasites

Macroparasites

Ectoparasites

Endoparasites

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#Id: 1999

#Unit 3. Fundamental Processes

In wild-type genes, RNA polymerase II terminates transcription at any one of multiple possible sites within about

2 kb of the polyadenylation signal. When the polyadenylation signal is mutated, RNA polymerase II does not terminate transcription, but continues transcription until the next poly(A) site.

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#Id: 4028

#Unit 7. System Physiology – Animal