Question

1. reset the simulation to its default settings
2. select the atp tab to watch how that variable changes with atrazine
3. run the simulation with atrazine set at 0 and make a note of the amount of atp produced
4. run the simulation with atrazine concentrations of 0.2, 0.3, 0.4, 0.5, 0.6, and 0.7 μmol and make a note of the amount of atp produced in each
5. now select the nadph tab and observe how much nadph was produced in each run

how do the different concentrations of atrazine affect the production of atp and nadph? select all that apply.
the amount of nadph produced decreases as atrazine increases
at an atrazine level of 0.7 and above, no nadph is produced
the amount of atp produced increases as atrazine increases
at an atrazine level of 0.7 and above, no atp is produced
the amount of atp produced decreases as atrazine increases
at an atrazine level of 0.3 and above, no nadp is produced
submit previous answers request answer
incorrect; try again; 5 attempts remaining
one of your answers is incorrect. run the simulation again with 0.3 μmol. is any nadph produced?

Explanation:

Atrazine is a herbicide that disrupts the electron transport chain in photosynthesis. ATP and NADPH are products of the light - dependent reactions of photosynthesis. As atrazine concentration increases, it inhibits the electron transport chain. For NADPH, its production is dependent on the flow of electrons (in the non - cyclic electron flow, electrons are used to reduce NADP+ to NADPH). As atrazine inhibits electron flow, NADPH production decreases. For ATP, it is produced via chemiosmosis (ATP synthase uses the proton gradient). Inhibition of electron transport reduces the proton gradient, so ATP production also decreases. When atrazine reaches a high enough level (in this case 0.7 μmol and above for ATP), the inhibition is so severe that no ATP is produced.

Answer:

• The amount of NADPH produced decreases as atrazine increases.
• At an atrazine level of 0.7 and above, no ATP is produced.
• The amount of ATP produced decreases as atrazine increases.