Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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Chapter 19, Problem 22P
Interpretation Introduction
Interpretation:
It is required to predict the effect of the herbicide Dichlorophenyldimethylurea (DCMU) on plant’s ability to perform cyclic photophosphorylation.
Concept introduction:
DCMU or Dichlorophenyldimethylurea is an herbicide that interferes with the process of photophosphorylation and oxygen evolution. In the presence of an artificial electron acceptor like ferricyanide, the oxygen evolution is not blocked.
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Photosynthetic response curve to light for sun (solid line, N = 14) and shade leaves (dashed line, N = 21) of S.
Why in this graph do we see shaded leaves have lower values compared to light leaves as PAR is increasing?
In cyclic photophosphorylation, it is estimated that two electrons must be passed through the cycle to pump enough protons to generate one ATP. Assuming that the ΔG for hydrolysis of ATP under conditions existing in the chloroplast is about -50 kJ/mol, what is the corresponding percent efficiency of cyclic photophosphorylation, using light of 700 nm?
Solar-induced fluorescence can be used to infer net photosynthesis. This is because this solar-induced fluorescence is able to measure the light that is used by the chlorophyll-a pigment (650-850nm). There is a linear relationship between this solar-induced fluorescence and the gross primary production of a plant.
How does measuring chlorophyll-a pigment with solar-induced fluorescence help us infer net photosynthesis?
Chapter 19 Solutions
Biochemistry
Ch. 19 - Prob. 1PCh. 19 - Prob. 2PCh. 19 - Prob. 3PCh. 19 - Prob. 4PCh. 19 - Prob. 5PCh. 19 - Prob. 6PCh. 19 - Prob. 7PCh. 19 - Prob. 8PCh. 19 - Prob. 9PCh. 19 - Prob. 10P
Ch. 19 - Prob. 11PCh. 19 - Prob. 12PCh. 19 - Prob. 13PCh. 19 - Prob. 14PCh. 19 - Prob. 15PCh. 19 - Prob. 16PCh. 19 - Prob. 17PCh. 19 - Prob. 18PCh. 19 - Prob. 19PCh. 19 - Prob. 20PCh. 19 - Prob. 21PCh. 19 - Prob. 22PCh. 19 - Prob. 23PCh. 19 - Prob. 24PCh. 19 - Prob. 25PCh. 19 - Prob. 26PCh. 19 - Prob. 27PCh. 19 - Prob. 28PCh. 19 - Prob. 29PCh. 19 - Prob. 30PCh. 19 - Prob. 31P
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- Despite CAM photosynthesis having a comparatively higher water use efficiency relative to C3 and C4 plants, its distribution is restricted primarily to desert succulents. In terms of water use efficiency, explain why CAM photosynthesis has not spread more widely.arrow_forwardENUMERATE the protein amino acid produced by plants from the following precursors. Ribulose-1,5-bisphosphate/ Calvin cycle Pyruvate a-ketoglutarate Oxaloacetate Phosphoribosylpyrophosphate Shikimic acid pathwayarrow_forwardWhich of the following is not involved in cyclic cyclic photophosphorylation? Group of answer choices: cytochrome bf complex plastocyanin ferredoxin P680arrow_forward
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