2 Points What happens when an atom gains an electron?
A. It has an increase in the number of protons.
B. It has an increase in the number of neutrons.
C. It becomes a negative ion.
ОО
O D. It becomes a positive ion.
SUBMIT

C

Explanation:

It becomes a negative atom because of the unequal balance in the atom. There are more negative electrons than positive protons so it becomes negative. Like a seesaw, more on one side so it falls down.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."