Red meat is rich in slow-twitch muscle fibers. The slow-twitch muscle fibers are rich in myoglobin and blood capillaries. They also have many large mitochondria to generate ATP by aerobic respiration.
These fibers are slow-twitch fibers as the ATPase in myosin head carries out the hydrolysis of ATP at a slower rate causing a slower contraction cycle.
Slow-twitch fibers appear red due to a large amount of myoglobin and a rich network of blood vessels. They are capable of prolonged contractions and are fatigue resistant.
Thymine has a methyl group and is better suited for the storage property of the DNA molecule as it is far more stable compared to Uracil. RNA contain Uracil instead of thymine so as to make differentiation of RNA molecule from DNA molecules easier.
