PLANT PHYSIOLOGY LECTURE QUIZ 3
WITH VERIFIED ANSWERS { GRADED
A+}
What is the importance of light? - ✔✔It is the energy source that creates
photosynthesis and is the information source
What does the information source consist of? - ✔✔It consist of developmental
signals via wavelength, intensity, duration, and periodicity
What is the purpose of photomorphogenesis? - ✔✔It helps light regulate plant
development
Photomorphogenesis has a... - ✔✔PHOTOSENSORY SYSTEM!!
- Consists of photoreceptors and signal transduction pathways
What do photoreceptors do? - ✔✔-They receive light signals and trigger
biochemical/physiological responses
, - They also have chromoproteins
What are chromoproteins made of? - ✔✔- Chromophore (pigment)
- Apoprotein
What are three types of photoreceptors? - ✔✔- Phytochromes
- Cryptochromes
- Phototropin
Phytochromes absorb... - ✔✔Red and far-red light and carry out many effects
Cryptochromes absorb... - ✔✔blue and UV light and are on seedling and
flowering
Phototropins absorb... - ✔✔blue and UV light while sensing light gradient
What can you tell me about phytochromes? - ✔✔- They have kinase activities
- Several members (PhyA and PhyE)
- They absorb red light (R, 665 nm)
- They absorb far-red light (FR, 730 nm)
WITH VERIFIED ANSWERS { GRADED
A+}
What is the importance of light? - ✔✔It is the energy source that creates
photosynthesis and is the information source
What does the information source consist of? - ✔✔It consist of developmental
signals via wavelength, intensity, duration, and periodicity
What is the purpose of photomorphogenesis? - ✔✔It helps light regulate plant
development
Photomorphogenesis has a... - ✔✔PHOTOSENSORY SYSTEM!!
- Consists of photoreceptors and signal transduction pathways
What do photoreceptors do? - ✔✔-They receive light signals and trigger
biochemical/physiological responses
, - They also have chromoproteins
What are chromoproteins made of? - ✔✔- Chromophore (pigment)
- Apoprotein
What are three types of photoreceptors? - ✔✔- Phytochromes
- Cryptochromes
- Phototropin
Phytochromes absorb... - ✔✔Red and far-red light and carry out many effects
Cryptochromes absorb... - ✔✔blue and UV light and are on seedling and
flowering
Phototropins absorb... - ✔✔blue and UV light while sensing light gradient
What can you tell me about phytochromes? - ✔✔- They have kinase activities
- Several members (PhyA and PhyE)
- They absorb red light (R, 665 nm)
- They absorb far-red light (FR, 730 nm)
