Which one yields ATP required for muscle contraction?
(a) Myoglobin
(b) Creatine phosphate
(c) Creatinine phosphate
(d) Myosin

Options

A. Myoglobin
B. Creatine phosphate
C. Creatinine phosphate
D. Myosin.

Answer

To determine which option yields ATP required for muscle contraction, let’s analyze each option step by step:

1. **Understanding Muscle Contraction**: Muscle contraction is an energy-demanding process that requires ATP (adenosine triphosphate) to function properly. ATP is the primary energy currency of the cell.

2. **Analyzing Each Option**:
- **(a) Myoglobin**: Myoglobin is a protein that stores oxygen in muscle cells. While it plays a crucial role in oxygen transport and storage, it does not produce ATP. Therefore, this option is incorrect.

- **(b) Creatine Phosphate**: Creatine phosphate is a high-energy compound found in muscle cells. It can quickly donate a phosphate group to ADP (adenosine diphosphate) to regenerate ATP during muscle contraction. This process is facilitated by the enzyme creatine kinase. Hence, this option is correct.

- **(c) Creatinine Phosphate**: This term seems to be a misnomer; the correct term is "creatine phosphate." Creatinine is a waste product formed from the breakdown of creatine and does not yield ATP. Therefore, this option is incorrect.

- **(d) Myosin**: Myosin is a motor protein that interacts with actin filaments to facilitate muscle contraction. While myosin requires ATP to function, it does not generate ATP itself. Thus, this option is also incorrect.

3. **Conclusion**: The correct answer is (b) Creatine phosphate, as it is the compound that yields ATP required for muscle contraction.