#Question id: 10437
#Unit 6. System Physiology – Plant
Phytochrome-mediated control of photomorphogenesis is linked to many other gene functions. The following statements are made on the mechanism of phytochrome action:
a) COP1, negative regulator of photomorphogenesis, is a component of the E3 ubiquitin ligase complex that targets photomorphogenesis-promoting proteins for degradation such as phyA
b) Light-dependent export of COP1 to the cytoplasm is a slow process, requires long exposure to light
c) The absence of COP1 in the cytosol permits the accumulation of transcriptional activators necessary for photomorphogenic development
d) The COP1–SPA1-E3 ligase complex is also responsible for the ubiquitination and proteasomal degradation of photomorphogenesis-promoting proteins, such as HY5
Which one of the following combinations is correct?
#Question id: 10438
#Unit 6. System Physiology – Plant
Which of the following are participate in the control of circadian clocks and flowering?
#Question id: 10439
#Unit 6. System Physiology – Plant
Cryptochromes are blue-light photoreceptors that mediate several blue-light responses, including___
#Question id: 10440
#Unit 6. System Physiology – Plant
cry1 mutant causes_______
#Question id: 10441
#Unit 6. System Physiology – Plant
Cryptochrome has photolyase activity, this suggest that;
#Question id: 10442
#Unit 6. System Physiology – Plant
Blue-light absorption triggers photoreceptor activation, in case of cryptochromes light absorption by the