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?

TLS Online TPP Program

#Question id: 32715

#Unit 1. Molecules and their Interaction Relevant to Biology

Which model correctly represents the graph

 

TLS Online TPP Program

#Question id: 32716

#Unit 1. Molecules and their Interaction Relevant to Biology

The given relationship is known as

TLS Online TPP Program

#Question id: 32717

#Unit 1. Molecules and their Interaction Relevant to Biology

The enzyme urease enhances the rate of urea hydrolysis at pH 8.0 and 20oC by a factor of 1014. If a given quantity of urease can completely hydrolyze a given quantity of urea in 5.0 min at 20oC and pH 8.0, how long would it take for this amount of urea to be hydrolyzed under the same conditions in the absence of urease?

TLS Online TPP Program

#Question id: 32718

#Unit 1. Molecules and their Interaction Relevant to Biology

When enzyme solutions are heated, there is a progressive loss of catalytic activity over time due to denaturation of the enzyme. A solution of the enzyme hexokinase incubated at 45oC lost 50% of its activity in 12 min, but when incubated at 45oC in the presence of a very large concentration of one of its substrates, it lost only 3% of its activity in 12 min. What is correct explanation

TLS Online TPP Program

#Question id: 32919

#Unit 2. Cellular Organization

Which control system triggers the early mitotic events that lead to chromosome alignment on the mitotic spindle in metaphase?

TLS Online TPP Program

#Question id: 32920

#Unit 2. Cellular Organization

If extracellular conditions become favorable or signals to grow and divide are introduced, cells in G0 progress through a commitment point in: