Bissoy.com
Doctors Medicines MCQs Q&A

In which iron(Fe) state myoglobin binds to the oxygen?

In which iron(Fe) state myoglobin binds to the oxygen? Correct Answer Fe2+

Myoglobin only in the Fe2+ state can bind with oxygen as the iron atom has six co-ordination bonds, 4 in the flat and two in a perpendicular state to the porphyrin ring. The oxygen binding site is present on the other side of six coordination position.

Related Questions

Which of the following statements is correct regarding the oxidation number of Oxygen? I. The oxidation number of Oxygen in most compounds is -2. II. When Oxygen is bonded to Fluorine in compounds like Oxygen difluoride and Dioxygen diflouride, the Oxygen is assigned an oxidation number of +2 and +2 respectively. III. In peroxide, an Oxygen atom is assigned an oxidation number of -1 and in Superoxide, each oxygen atom is assigned an oxidation number of -1/2.
In a well aerated and agitated microbial culture, the 'supply' of oxygen is equal to 'demand' (uptake) of the growing culture. The KLa for such a system will be (KLa = volumetric mass transfer coefficient, C* = dissolved oxygen concentration in liquid in equilibrium with gaseous oxygen, C = instantaneous value of dissolved oxygen concentration, 'r' = specific oxygen uptake rate per unit weight of cells, X = dry weight of the cells per unit volume)
In the binding of oxygen to myoglobin, the relationship between the concentration of oxygen and the fraction of binding sites occupied can best be described as ___________
A bacterial culture having a specific oxygen uptake rate of 5 mmol O2 (g DCW)-1 hr-1 is being grown aerobically in a fed-batch bioreactor. The maximum value of the volumetric oxygen transfer coefficient is 0.18 s-1 for the stirred tank bioreactor and the critical dissolved oxygen concentration is 20% of the saturation concentration (8 mg mL-1). The maximum density to which the cells can be grown in the fed-batch process without the growth being limited by oxygen transfer, is approximately
The Railways will operate Oxygen Express trains to transport liquid medical oxygen and oxygen cylinders across the country. How many PSA oxygen plants are being installed in 32 states and Union territories from PM CARES?
Mine water flowing at 1.5 m3/s with 2 mg/l dissolved oxygen, joins riverwater flowing at 7 m3/s containing 6 mg/l dissolved oxygen. The saturated value of the dissolved oxygen in the mixture is given to be 9.3 mg/l. On the basis, the initial oxygen deficit of the mixture in mg/l is
The relationship between oxygen concentration and the fraction of binding sites occupied in myoglobin can best be described as ________
What is the shape of the oxygen dissociation curve of myoglobin?
Order the following events observed during muscle contraction in the correct sequence
1. The sarcomere shortens
2. ATP is hydrolyzed
3. Ca2+ binds to troponin
4. ATP binds to myosin
5. Mosin contracts F-actin
6. F-actin moves
7. Tropomyosin moves
8. Ca2+ is released from the sarcoplasmic reticulum
In a gas mixture of hydrogen and oxygen, steady state equimolar counter diffusion is occurring at a total pressure of 100 kPa and temperature of 20°C. If the partial pressures of oxygen at two planes 0.01 m apart, and perpendicular to the direction of diffusion are 15 kPa and 5 kPa, respectively and the mass diffusion flux of oxygen in the mixture is 1.6 * 10–5 kmol/m2.sec, calculate the molecular diffusivity for the system. For equimolar counter current diffusion: