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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Students have asked these similar questions
Light that the chlorophyll-a pigment uses may be measured by the solar-induced fluorescence (650-850nm). This fluorescence caused by the sun and a plant's gross primary output are correlated linearly.
Why can solar induced fluorescence be used to infer net photosynthesis?
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?
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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- 1.) True or False. In the second step of Light Dependent Reaction, P680 loses its electron and becomes positively charged (P680+)arrow_forwardModified TRUE or FALSE. Write the word TRUE if the statement is correct. If the statement is false, write the incorrect underlined word/s and indicate the correct word/s to make the statement true. During photorespiration, Rubisco acts as carboxylase that catalyzes the reaction of RuBP and oxygen to form phosphoglycolate and PGA in the chloroplast.arrow_forwardNeed help In what kinds of environments would you expect to find C3, C4, or CAM plants? What is the advantage of the C4 pathway when CO2 concentrations are low?arrow_forward
- On a hot, dry day, plants close their stomata to conserve water. Explain the connectionbetween the oxidation of water in photosystem II of the light-dependent reactions and thesynthesis of glyceraldehyde-3-phosphate (G3PA) in the light-independent reactions. Predict theeffect of closed stomata on the synthesis of G3PA and justify the prediction.arrow_forwardusing a 14CO2 fixation assimilation method,a plant is found to be fixing carbon at a rate of 140mgh-1 .dm-2 leaf area in the sunlight. In darkness the same plant is losing 30mgh-1.dm-2 . Calculate the photosynthetic capacity of the plant and state with reasons to which photosynthetic type the plant belongsarrow_forwardPlants containing only chlorophyll b are exposed to radiation with the following wavelengths: 10nm (x- rays), 450nm (blue light), 670nm (red light), and 800nm (infrared light). Which plants harness the most energy for photosynthesis? X-ray irradiated plants Blue light irradiated plants Red light irradiated plants Infrared irradiated plantsarrow_forward
- Which order of molecular conversions is correct for the Calvin cycle? RuBP + G3P 3-PGA sugar RuBisCO CO2 RuBP G3P RuBP + CO2 [RuBisCO] 3-PGA G3P CO2 3-PGA RuBP G3Parrow_forwardDescribe the pathway of electi on transfer from photosystem II to photosystem I in light-dependent reactions.arrow_forwardWhich part of the light-independent reactions would be affected if a cell could not produce the enzyme RuBisCO?arrow_forward
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