Why do cells have to constantly produce ATP?

So they can transfer energy and phosphorylate to other molecules in cellular processes such as DNA replication, active transport, synthetic pathways and muscle contraction.

Explanation:

a. possible errors

d. new questions

explanation:

predictions and planning happen before. a summery comes after. errors you get after investigation and new questions propose what you can look for in the future.

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies