A cell with membrane-bound proteins that selectively bind a specific hormone is called that hormone's ________.

#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