Answer:
DNA is made of repeating units of building blocks called nucleotides.
Explanation:
There are four nucleotides in the DNA, the guanine and thymine, adenine and cytosine. Guanine binds with cytosine and adenine binds with thymine.
These nucleotides are made of deoxyribose sugar that binds to a phosphate and a nitrogenous base.
Answer:
mutation
Explanation:
trust me, i took the test
I think the answer is letter b