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Red muscles have abundant...

Red muscles have abundant

A

Lactic acid and acetic acid

B

Glucose and haemoglobin

C

Relaxin and myosin

D

Myoglobin and cytochrome

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Muscle Types**: Muscles are categorized into different types based on their color and function. Red muscles, also known as slow-twitch muscles, are primarily responsible for endurance activities. 2. **Identifying Key Components**: Red muscles contain specific proteins and pigments that are crucial for their function. The two most notable components are myoglobin and cytochrome. 3. **Role of Myoglobin**: Myoglobin is a red pigment found in muscle tissues. Its primary function is to store and transport oxygen within the muscle cells. This is essential for aerobic respiration, which provides energy during prolonged, low-intensity activities. 4. **Role of Cytochrome**: Cytochromes are proteins found in the mitochondria of cells. They play a vital role in the electron transport chain, which is a key component of cellular respiration. The presence of cytochromes in red muscles indicates a high capacity for aerobic metabolism. 5. **Conclusion**: Therefore, red muscles are abundant in myoglobin and cytochrome, which facilitate efficient oxygen usage and energy production during sustained physical activities. **Final Answer**: Red muscles have abundant myoglobin and cytochrome. ---
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