Answer:
Negative
Explanation:
There are more electrons (negative charge) than there are protons (positive charge).
I am not really sure but you can get the answer from it :
They discovered a fundamental mechanism of how proteins protect chromosomes while DNA is being copied (a process called DNA replication), which relies on a protein called RPA. Cells have a limited amount of this protein, which they use as 'band aids' to protect the DNA temporarily during replication.
I'm not sure but think its A
Pulmonary artery carry blood from the right ventricle of the heart to the lungs for oxygenation.