The metalloproteins hemoglobin and vitamin B12 contain the metals
A) iron and zinc, respectively.
B) cobalt and nickel, respectively.
C) iron and Mo, respectively.
D) manganese and iron, respectively.
E) iron and cobalt, respectively.
Correct Answer:
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Q11: Which of the following would be the
Q12: The atomic radii of the Period 6
Q13: Which of the following pairs have about
Q14: The d-metals can be mixed together to
Q15: Vanadium metal is produced by the
A) reduction
Q17: Which of the following oxides is likely
Q18: In the d-block elements, the third-row metallic
Q19: The properties of the transition metals vary
Q20: Which of the following is likely to
Q21: Both Cu2+(aq)and Zn2+(aq)are colorless.
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