50 !

draw an mrna strand thats complementary to the dna strand aattgc. circle a nucleotide.

you can draw it on paper and take a picture. then click the paperclip think at the bottom to put in (it says drop files).

if you're using a laptop or computer you can email it to yourself and save on your laptop or computer and click the paperclip thing and put it there. you!

a nucleotide makes up DNA as the sugar is a close up on the sugar phosphate backbone the nucleotide in the second picture is "3" to "5" prime. "5" to "3" prime is the almost the same thing but upside down in picture 3.picture 4 kinda explains what the nucleotide looks like better don't play attention to 5'c or 3'c yet becuase it may get you confused just observe the and the sugar. when you need draw the full DNA strand with the nucleotides I suggest drawing the circle on top of the sugar. picture 5 is basically the full strand of nucleotides and a close up version of picture 1. ask any questions! :)

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.