Bonus: A herbicide blocks the light reaction of photosynthesis. Therefore, what is being blocked by this herbicide act and killing the plant? (What does the light reaction do?) • The herbicide prevents CO2 from being converted to protein for the dark cycle. • The herbicide prevents O2 from being converted to sugar for cellular respiration. • The herbicide prevents energy from the sun from being converted into ATP for the dark cycle. • The herbicide prevents CO2 from being made for cellular respiration.
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Step 1: The light reaction of photosynthesis is the process where sunlight is converted into chemical energy for the plant to use. Show more…
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A new type of herbicide is discovered; the way it works is unknown; but after application, plants are unable to split hydrogen and oxygen from water. However, when provided with artificial ATP and NADPH, the plant is capable of synthesizing sugars. This herbicide most likely functions by disabling the plant's: Thylakoids Mitochondria Chloroplasts Stroma
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You are an intern at a company developing herbicides to use against invasive plant species. The team has already collected some data about the effects of these herbicides. Your job is to determine the mechanism of action for each herbicide (the way it affects the chloroplast to block photosynthesis). Why would blocking photosynthesis be a good way to kill plants? The first set of data describes NADPH production (ng/mol) before and 10 minutes after herbicide addition. When in photosynthesis is NADPH normally produced? What is it used for?
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Weed killer 1. Dichlorophenyldimethylurea(DCMU), a herbicide, interferes with photophosphorylation and $\mathrm{O}_{2}$ evolution. However, it does not block $\mathrm{O}_{2}$ evolution in the presence of an artificial electron acceptor such as ferricyanide. Propose a site for the inhibitory action of DCMU.
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