When oxygen binds to a heme-containing protein, the two open coordination bonds of Fe2+ are occupied by___________

When oxygen binds to a heme-containing protein, the two open coordination bonds of Fe2+ are occupied by___________ Correct Answer One O2 molecule and one amino acid atom

The two coordination bonds to Fe2+ perpendicular to the porphyrin ring system. One of these bonds is occupied by a Hys residue and the other bond by O2.
Bissoy MCQ

Related Questions

Phytase, an enzyme produced by Aspergillus niger can be adsorbed on microcrystalline cellulose powder (MCCP). The adsorption follows a Langmuir isotherm and the maximum concentration of the protein that can be obtained on the adsorbent is 70 mg cm-1. At a concentration of 50 mg L-1 of protein in the solution, the concentration of protein on the adsorbent reaches 35 mg cm-1. It is desired to recover 90% of the protein from 1.5 liter of the cell free culture filtrate containing 220 mg L-1 protein by addition of MCCP to the solution. The concentration of the protein adsorbed on the solid at equilibrium will be:
Consider the following statements.
1. Coordination means synchronisation of efforts with respect to time and direction.
2. The basic principles of coordination are direct contact and continuity of efforts.
3. In a given situation, cooperation may exist without coordination.
Which of the statement(s) given above is/are correct?
Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer :

Statements : About 50 per cent of the animal by-products - hair, skin, horns etc. is edible protein. American chemists have developed a method of isolating 45 per cent of this protein. They used an enzyme developed in Japan to break down soya protein.

Conclusions :
I. Americans have not been able to develop enzymes.
II. Animal by-products protein has the same composition as soya protein.
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)
Fe2++Sn4+⇌Fe3++Sn2+উপরের বিক্রিয়াটিতে-i. Fe2+ জারিত হয়েছে ii. Sn4+ বিজারকiii. Fe3+ একটি ইলেকট্রন গ্রহণ করেছেনিচের কোনটি সঠিক?
FeCl2 + Cl2 = 2FeCl3 বিক্রিয়াটিতে-i. Fe2+ বিজারকii. Cl2 জারকiii. Fe2+ এর জারণ ঘটেনিচের কোনটি সঠিক?
সংঘটিত বিক্রিয়াটিতে- i. অ্যানোড বিক্রিয়া: Zn → Zn2+ + 2e- ii. জিংক আয়নের বিজারণ বিভব Fe2+ অপেক্ষা কমiii. ক্যাথোড বিক্রিয়া: Fe2+ + 2e- → Fe নিচের কোনটি সঠিক?
Fe2+ ও Fe3+ আয়ন দুটির ক্ষেত্রে- i. Fe2+ কম সুস্থিত ii. Fe3+ অধিক সুস্থিত iii. উভয় আয়ন রঙিন নিচের কোনটি সঠিক?
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If Z is open, which of the following must be true?
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If R is closed and U is open, which of the following must be true?