What is the role of blue light in terms of stomatal study?

a.) Blue light activates a proton-pumping ATPase in the guard cell plasma membrane and leading to stomatal opening

b.) blue-light stimulation lowers the pH of the apoplastic space surrounding the guard cells, and generates the driving force needed for ion uptake and stomatal opening

c.) The sensitivity of guard cells to blue light increases as a function of their zeaxanthin concentration

d.) npq1 mutant opens at higher fluence rates of blue light, whereas the phot1/phot2 mutant fails to show any blue light–stimulated opening

Which one of the following combination is correct?

#Question id: 1521

#Unit 4. Cell Communication and Cell Signaling

we examine how the deregulation of growth-promoting and growth-inhibiting signaling pathways contributes to tumorigenesis. Mutations-

A. A mutation that alters a single amino acid (valine to glutamine) in the transmembrane region of the HER2 receptor

B. A deletion that causes loss of the extracellular ligand-binding domain in the EGF receptor Results-

i. dimerization of the receptor, even in the absence of the normal EGF-related ligand, transforming it into the oncoprotein, a constitutively active kinase

ii. to constitutive activation of the kinase activity of the resulting oncoprotein

iii. no dimerization, even in the presence of the normal EGF-related ligand, repression of kinase activity

which of the following results are displayed after these mutations?

#Question id: 5202

#Unit 11. Evolution and Behavior

Which of the following most correctly describes a shotgun technique for sequencing a genome?

#Question id: 12956

#Unit 10. Ecological Principles

#Question id: 5080

#Unit 5. Developmental Biology

As cleavage continues during frog development, the size of the blastomeres:

#Question id: 11333

#Unit 10. Ecological Principles

Small geographic areas with high concentrations of endemic species and a large number of endangered and threatened species are known as