Plant cells have several internal compartments, each of which can differ in its ionic composition. The cytosol and the vacuole are the most important intracellular compartments that determine the ionic relations of plant cells, Ion concentrations in the cytosol and the vacuole are controlled by passive (dashed arrows) and active (solid arrows) transport processes

  

Which of the following statement INCORRECT from the above figure;

#Question id: 7233

#Unit 5. Developmental Biology

Following statements are regarding to the coordination of Dictyostelium discoideum stalk and spore maturation by cAMP.

A. In prestalk cells at the slug tip, cAMP is synthesized by ACR and can either be hydrolysed by RegA or bind to PKA to trigger stalk encapsulation, which normally occurs when the tip projects upward at the onset of fruiting body formation and loses ammonia (NH3) by gaseous diffusion.

B. NH3 inhibits PKA by indirectly activating cAMP hydrolysis via DhkC-RdeA mediated phosphorylation of RegA.

C. In prespore cells, PKA activation occurs as a consequence of a signalling cascade that is activated by SDF-3, which inhibits the synthesis of GABA by prespore cells.

D. Secreted GABA then acts on prestalk cells to induce the cell-surface exposure of the serine protease domain of the ABC transporter TagC.

E. GABA also acts on prespore cells to induce secretion of AcbA, which in turn is cleaved by the TagC protease to produce the peptide SDF-2.

F. SDF-2 next activates the histidine phosphatase activity of DhkA, causing activation of cAMP hydrolysis by RegA. This allows cAMP to accumulate and activate PKA, which in turn induces spore encapsulation.

Which of the following combinations are correct?

#Question id: 4251

#Unit 3. Fundamental Processes

Which of the following statements correctly describes the effect a nonsense mutation would have on a gene?

#Question id: 28324

#Unit 5. Developmental Biology

Echinoderms exhibit which type of cleavage?

#Question id: 28917

#Unit 4. Cell Communication and Cell Signaling

Find out the correct match of Vertebrates hedgehog gene with their characteristics;

#Question id: 11196

#Unit 7. System Physiology – Animal

Pyrethroid insecticides prevent the voltage-gated sodium channels of insects from inactivating. Neurons that were exposed to pyrethroids would ________.