wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The wavelength of light absorbed by Pr form of phytochrome is _____

A
640 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
680 nm
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
720 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
620 nm
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 680 nm
Light acts as a signal to initiate and regulate photoperiodism and photomorphogenesis. There are two light-sensing systems involved in these responses, the blue light-sensitive system and the red light-sensitive or phytochrome system. The action spectrum of the light needed for Pr responses is at about 680 nm.
So, the correct answer is '680 nm'

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Significant Figures
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon