Compare the functions of a cell to the functions of an organism, such as gettign rid of waste

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13

Kinases add - groups to other enzymes. this activities some enzyme while inhibiting other

What happens when two nitrogen atoms share electrons