Question

The pair in which both species have iron is

• A. nitrogenase, cytochromes
• B. carboxypeptidase, haemoglobin
• C. haemocyanin, nitrogenase
• D. haemoglobin, cytochromes

Answer 1

Answer: (D)

Nitrogenase contain nitrogen.
Cyctochromes contain iron
Carboxypeptidase contain carbon, nitrogen
Haemoglobin contain iron
Haemocyanin contain copper
So, haemoglobin and cytochrome contain iron.