Question

a. Simazine is an herbicide used on corn, fruit and nut crops, and Christmas trees. This herbicide binds to the electron transport chain in the thylakoid membrane of the chloroplasts. When simazine binds to the electron transport chain, electrons are no longer able to flow through the chain. Describe all of the processes of the light reactions disrupted when Simazine is present.

Answer 1

Answer:the thylakoid membrane usually has two photosystems that absorbs sunlight;the photosystems 11 and 1 .in the light reaction of photosynthesis,when light energy hits the photosystems,the electrons are boosted to higher energy and pass through the electron Transport chain by electron acceptor molecules until it is used in the formation of ATP and NADPH.

However when simazine is present,electrons can no longer be transferred from one electron acceptor to the other for the reduction of NADP+ to NADPH.

Also since no electron is being transferred,the PS II would not have a need to split water molecules ,which products are more electrons and protons which pass through the thylakoid lumen and creates a proton gradient needed for the production of ATP

Step-by-step explanation: