Question

Dark colour of breast muscles of birds of flight is due to high concentration of

• A. Mitochondria
• B. Haemoglobin
• C. Myoglobin
• D. Both myoglobin and mitochondria

Answer 1

The correct option is C Myoglobin

• Muscle fibres of the breast of birds are incorporated with an oxygen-carrying protein called myoglobin.
• Myoglobin receives oxygen from the red blood cells and transports it to the mitochondria of muscle cells, where the oxygen is used in cellular respiration to produce energy.
  
• The dark colour of breast muscles of birds of flight is due to high concentration of myoglobin.
• So, the correct answer is 'Myoglobin'.