Questions: The general name for an enzyme that transfers phosphate groups from ATP to a protein is

The answer is the fourth one: protein kinase.

Explanation for each option:

1. Protein dehydrogenase: This enzyme is involved in oxidation-reduction reactions, not in transferring phosphate groups. It typically removes hydrogen atoms from a substrate.

2. Protein cyclase: This is not a standard term for an enzyme that transfers phosphate groups. Cyclases are enzymes that form cyclic compounds, such as adenylate cyclase, which converts ATP to cyclic AMP.

3. IAM SURE protein phosphatase: This is incorrect. Protein phosphatases remove phosphate groups from proteins, which is the opposite of what the question asks.

4. Protein kinase: This is the correct answer. Protein kinases are enzymes that transfer phosphate groups from ATP to specific amino acids in proteins, typically serine, threonine, or tyrosine residues.

5. Peptidase: This enzyme breaks down peptides into amino acids and does not transfer phosphate groups.

In summary, the enzyme that transfers phosphate groups from ATP to a protein is called a protein kinase.