Answer:
The answer is C.
Explanation:
At first, an enzymes called Helicase unwind the double helix in a DNA .
Answer: To show how different members of a species are related.
It is called Fluid Mosaic Model. It describes the structure of the plasma membrane as a mosaic component. The structures such as phospholipids, protein, carbohydrates and cholesterol gives the fluid like character of the plasma membrane.
Changes in pH change the attractions between the groups in the side chains of the protein.
