#Question id: 10485
#Unit 6. System Physiology – Plant
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: 5664
#Unit 5. Developmental Biology
Following statements are regarding to gamete fusion and the prevention of polyspermy in mammals.
A. In mammals, it is not the tip of the sperm head that makes contact with the egg but the side of the sperm head.
B. The junction between the inner acrosomal membrane and the sperm cell membrane is called the acrosomal region, and this is where membrane fusion between sperm and egg begins.
C. Sperm-egg fusion appears to involve several proteins, two of which are Izumo, in the oocyte membrane, and Juno, in the acrosomal membrane.
D. These fusion proteins bind together and appear to recruit other proteins to make an adhesion and fusion complex.
Which of the following statements are correct?
#Question id: 12789
#Unit 10. Ecological Principles
#Question id: 12486
#Unit 2. Cellular Organization
#Question id: 17805
#Unit 9. Diversity of Life Forms