Answer:
The four nitrogenous bases
Helpful Tip:
To know which base goes with which
Remember
Car in the Garage
<em>Cytosine and Guanine</em>
and
Apple in the Tree
<em>(Adenine and Thymine)</em>
1. Atoms and molecules
2. Cells
3. Tissue
4. Organ systems
5. Organs
Answer:
an enzyme
Explanation:
The picture is about substrate complex which is about emzymes