Explain how the overall three-dimensional shape of myoglobin allows it to function as an oxygen-storage molecule
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Explain how the overall three-dimensional shape of myoglobin allows it to function as an oxygen-storage molecule
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Solved in 2 steps
- Explain how the structure of myoglobin changes upon oxygen binding.Calculate the percent oxygen saturation of myoglobin if 7 of 15 binding sites are occupied..Part B. Myoglobin Final Structure Tertiary or Quaternary Oxygen Binding Affinity Curve is Hyperbolic or Sigmoidal Does it have a heme prosetic group that biinds to oxygen Is it suited for oxygen transport or storage Does is participate in cooperative binding?
- What is the ratio of oxygen bound to myoglobin to that directly dissolved in the water of sperm whale muscle?Compare and contrast the oxygen binding pockets of myoglobin and haemoglobin.The filaments of skeletal muscle are moved by free energy derived from the hydrolysis of ATP. During sustained muscle contraction ATP levels remain fairly constant, while levels of creatine phosphate fall. Explain why this is so. Under what circumstances is an oxygen debt incurred during muscle contraction?
- During one cross-bridging cycle in striated muscle one ATP molecule is hydrolyzed. Explain the two times when the energy from this hydrolysis is used, and what “work” is done in each case.Explain the ways in which the molecular structure of haemoglobin and collagen are related to their functions.Muscular atrophy occurs when:
- Contrast the role of Ca2+in the contraction of a skeletalmuscle fiber and a smooth muscle cell.Which statement is true for the heme group present myoglobin: a. Oxygen binding to heme group is influenced by serine residues within proteins’ sequences. b. Oxygen binding to heme can become irreversible as a result of interaction with certain protein residues. c. Oxygen reversibly binds to the heme prostetic group and this binding is influenced by histidine residues within the myoglobin sequence. d. The heme group dissociates from Mb after oxygen is released.Explain why (a) calcium ions and (b) ACh are vital for muscle contraction.
