Question

Which of the following statements concerning Leghemoglobin (LH) is false? A) when compared to horse hemoglobin there are large scale rotations in each helix within LH b. the change each in rotation of each helix is thought to have occurred independently as the result of many amino acid changes occurring one at a time over long periods of time c. LH bears a striking resemblance to a light harvesting complex in cyanobacteria Dbhycocyanins are large protein complexes which utilize a chromophore instead of a heme group

Answer 1

ANSWER :

The leghemoglobin is a chromoprotein produced in root nodules of nitrogen fixing leguminous plants which resembles with hemoglobin of animals. It acts as oxygen scavenger due to their high oxygen affinity hence protect nodule cyanobacteria with excess oxygen. But it does not show any striking resemblance with light harvesting complex in cyanobacteria.