5? ig thats my guess not sure
Answer:
A
Explanation:
i have to say A but im not sure this is hard
Answer:
In structural biology, a protein subunit is a single protein molecule that assembles (or "coassembles") with other protein molecules to form a protein complex. Some naturally occurring proteins have a relatively small number of subunits and therefore described as oligomeric, for example hemoglobin or DNA polymerase.
Explanation:
Google
A foreign object collided into Earth and a chunk fell off, forming the moon.