Photosystems 1 and 2 are here
After cleavage of the nucleoplasmin protein, only the tail segments appeared in the nucleus is evidence of a discrete nuclear localization signal somewhere on the nucleoplasmin protein.
Proteins and fats i believe... Its been awhile.
Answer:
Human blood is red because hemoglobin, which is carried in the blood and acts as an oxygen transport agent, is iron-rich and red in colour.
I think this is A but I'm not 100% sure (:
