The nucleotide sequence of the DNA is GACT or RNA, which is the molecule. Hope this helps :)
I would agree with your answer of C. As there would need to be calcium to start with and they seem to come from the sarcoplasmic reticulum
Veins carry blood from the body to the heart.
Arteries carry blood from the heart to the body.
Your answer is: arteries
Hope that helped:)
