Which of the following is a wound-inducible glucan composed primarily of β(1,3)-linkages?

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#Question id: 14685

#Unit 4. Cell Communication and Cell Signaling

In dark-adapted rod cells, a high level of cGMP keeps cGMP-gated nonselective cation channels open, leading to hyperpolarization of the plasma membrane and neurotransmitter release. 

B - Light absorption generates activated rhodopsin, R*, which binds inactive, GDP-bound Gαt protein and mediates the exchange of GDP for GTP . 

C- The free Gαt∙GTP activates PDE by binding to its inhibitory γ subunits and dissociating them from the catalytic α and β subunits . Relieved of their inhibition, the α and β subunits of PDE hydrolyze GMP to cGMP . 

D- The resulting decrease in cytosolic cGMP leads to dissociation of cGMP from the cation channels in the plasma membrane and the closing of those channels . 

E- The membrane then becomes transiently hyperpolarized, and neurotransmitter release is reduced. 

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#Question id: 18996

#Unit 13. Methods in Biology

If a sample is volatile between 200 – 300 C, which chromatography is used

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#Question id: 2442

#Unit 2. Cellular Organization

The drug colchicine acts to

a. promote microtubule assembly.     

b. inhibit microtubule assembly.

c. sever microtubules.                        

d. block cell division.

e. cap microtubule ends.

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#Question id: 4280

#Unit 3. Fundamental Processes

Translocation of proteins into mitochondria and chloroplasts is characterized by

TLS Online TPP Program

#Question id: 33466

#Unit 1. Molecules and their Interaction Relevant to Biology

GC Major groove in DNA molecule show chemical information as