Please give reason !!
116. The graph shows the relation between light intensity and the giving off and taking up of carbon dioxide by the leaves of a plant. Why is most carbon dioxide given off when the light intensity is zero units?
(a) Because it is just the start of the experiment
(b) Only respiration is taking place at this intensity of light
(c) Only photosynthesis is taking place at this intensity of light
(d) The rate of photosynthesis is equivalent to the rate of respiration.
Dear student,
only respiration takes place at this intensity of light.
at very very low light intensity there is no photosynthetic activity as photons arive too infrequently to drive the enzyme forward.
Photorespiration is a wasteful pathway that occurs when the calvin cycle enzyme rubisco acts on oxygen rather than carbon dioxide when plants cannot photosynthesise.
Regards
only respiration takes place at this intensity of light.
at very very low light intensity there is no photosynthetic activity as photons arive too infrequently to drive the enzyme forward.
Photorespiration is a wasteful pathway that occurs when the calvin cycle enzyme rubisco acts on oxygen rather than carbon dioxide when plants cannot photosynthesise.
Regards