Which of the following structures is not a component of a photosystem?
atp synthase
antenna molecule
reaction center
primary electron acceptor

ATP synthase

Explanation:

ATP synthase is an enzyme with two functional components and is responsible for the synthesis of ATP through photophosphorylation. Along with other components of the electron transport chain, the ATP synthase of the chloroplast is present on the stromal side of thylakoid membranes. ATP synthase complexes are not part of photosystems.

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."