The pH at which the positive and negative charges of an amino ...

[bio_gurl]

The pH at which the positive and negative charges of an amino acid balance each other is called the
 
  A) isoelectric point.
  B) isobaric point.
  C) isobestic point.
  D) isotonic point.
  E) isomer point.

Question 2

Adding one neutron to the nucleus of an atom
 
  A) converts it to an isotope of the same element.
  B) increases its atomic mass by two units, but does not change its atomic number.
  C) increases its atomic number by one unit but does not change its atomic mass.
  D) does not change either its atomic number or its atomic mass.
  E) converts it to an atom of a different element.

[Chocorrol77]

Answer to Question 1

A

Answer to Question 2

A

[bio_gurl]

Thanks for the timely response, appreciate it

[juliaf]

Gracias!