Creatine kinase transfers a phosphate group from Blank______ to ADP to generate ATP.Multiple choice question.ADPcreatine phosphateglycogenmyoglobin

Break Down the Problem

1. Identify the role of creatine kinase in energy metabolism.
2. Determine the correct substrate from which creatine kinase transfers a phosphate group.

Relevant Concepts

• Creatine kinase (CK) is an enzyme involved in the phosphocreatine system, which helps regenerate ATP (adenosine triphosphate) during short bursts of intense activity.
• The reaction catalyzed by creatine kinase can be represented as follows: $\text{Creatine} + \text{ATP} \rightleftharpoons \text{Phosphocreatine} + \text{ADP}$
• In this reaction, ATP is used to produce phosphocreatine, which can then donate a phosphate group to ADP to generate ATP during times of high energy demand.

Analysis and Detail

1. From the list of options:
   • ADP: This is the product of the reaction, not the source of the phosphate group.
   • Creatine phosphate: This is the phosphorylated form of creatine and the primary substrate that donates the phosphate group to ADP.
   • Glycogen: This is a storage form of glucose but not directly involved with CK in phosphate transfer.
   • Myoglobin: This is an oxygen-binding protein and does not play a direct role in phosphate transfer.

Verify and Summarize

The enzyme creatine kinase specifically catalyzes the transfer of a phosphate group from creatine phosphate to ADP to regenerate ATP during anaerobic conditions or rapid bursts of energy.

Final Answer

Creatine kinase transfers a phosphate group from creatine phosphate to ADP to generate ATP.