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Cellular and Molecular Biology

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Electron Transport and Herbicide Damage

CELLS-WCYIBT

The herbicide paraquat diverts electrons from ferredoxin in plant cells to oxygen. This creates free radicals that damage plant chloroplasts.

Would this chemical harm human beings? If so, why would it do so? If not, why not?

A

Yes, because human cells use the photosystem in the same way that plants do.

B

No, because humans do not possess chloroplasts that are susceptible to free radicals.

C

Yes, because paraquat can divert electrons from the respiratory chain to damage human tissue in a similar fashion as it does in plant tissue​.

D

No, because human cells can undergo anaerobic metabolism.