Recall the following rules for base pairing in a dna strand (note: not in an rna strand):
dna pairs

use the above to complete the following table: (remember i'm asking for dna, so there are no u's)

template strand complementary strand
aaatt a.
cgcat b.
gggac c.
acggt d.

AAATT - TTTAA  

CGCAT - GCGTA

GGGAC - CCCTG  

ACGGT - TGCCA

Explanation:

In DNA, A and T, also known as adenine and thymine pair together and G and C, also known as guanine and cytosine pair together due to the hydrogen bonds formed between the two bases.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

i think that you are smart and you should fit for it out