Use what you know about ecosystem stability and the information provided in the graph below to answer the following question.

Which community (a-e) would likely be the most biodiverse?

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#Question id: 18920

#Unit 13. Methods in Biology

Which selection system is used in a yeast plasmid recombinant?

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#Question id: 27034

#Unit 10. Ecological Principles

A parasite Toxoplasma gondii infects rat and changes behaviour of rat through odour, such as

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#Question id: 2365

#Unit 2. Cellular Organization

A denatured enzyme no longer has its usual ______ .

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#Question id: 14686

#Unit 4. Cell Communication and Cell Signaling

This member of the AKAP family, designated mAKAP, anchors both PDE and the regulatory subunit  of PKA to the nuclear membrane, maintaining them in a negative feedback loop that provides close local control of the ATP level and PKA activity.

B- The basal level of PDE activity in the presence of hormone (resting state) keeps cAMP levels below those necessary for PKA activation. 

C- Activation of β-adrenergic receptors causes an increase in cAMP to a level in excess of that which can be degraded by PDE. 

D- The resulting binding of cAMP to the R subunits of PKA releases the active catalytic (C) subunits into the cytosol. Some C subunits enter the nucleus, where they phosphorylate and thus activate certain transcription factors . Other C subunits phosphorylate PDE, stimulating its catalytic activity.

E-  Active PDE hydrolyzes cAMP, thereby driving cAMP levels back to basal levels and causing re-formation of the inactive PKA C-R complex. Subsequent de-phosphorylation of PDE returns the complex to the resting state.

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#Question id: 1925

#Unit 4. Cell Communication and Cell Signaling

 CD44 is a molecule that can be involved in: