Fusicoccum amygdali produces the toxin fusicoccin, which constitutively activates the plasma membrane ____

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#Question id: 20401

#Unit 3. Fundamental Processes

There were four rules of parity given by Erwin Chargaff 

1) Base A in one strand of the duplex is matched by (T) in the other strand, and base G in one strand of the duplex is matched by a complementary base (C) in the other strand

2) equal amounts of A and T, and equal amounts of C and G, in each single strand of the duplex. 

3) Purines in non-template strand applies more closely to Exons

4) GC content tends to be greater in exons than in introns

choose the correct option regarding rules 

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#Question id: 3675

#Unit 3. Fundamental Processes

Which describes the role of primase during replication?

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#Question id: 9256

#Unit 9. Diversity of Life Forms

Which of the following areas of study focuses on the exchange of energy, organisms, and materials between ecosystems?

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#Question id: 12181

#Unit 2. Cellular Organization

Following statements are regarding to the CFTR.

A. cystic fibrosis transmembrane conductance regulator allows Cl− ions to flow out of the cell, following their concentration gradient.

B. ATP binding to CFTR’s two nucleotide-binding domains appears to close the Cl− channel, and the hydrolysis of one ATP opens it (the other ATP remains intact).

C. the CFTR channel can open only if its regulatory domain (which is unique among ABC transporters) has been phosphorylated, thus regulating the flow of ions across the membrane.

D. The maintenance of electrical neutrality requires that the Cl− ions transported by the CFTR be accompanied by positively charged ions, mainly Na+. The transported ions are osmotically accompanied by water, thus maintaining the proper level of fluidity in secretions of the airways, intestinal tract, and the ducts of the pancreas, testes, and sweat glands.

Which of the following combination is correct?

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#Question id: 18077

#Unit 7. System Physiology – Animal

During which stage of the general adaptation syndrome (GAS) does the body adjust to the new stressor?