Lesson 1B Review Questions-The Sample 1. What gives hemoglobin and myoglobin the

Question

Lesson 1B Review Questions-The Sample 1. What gives hemoglobin and myoglobin their distinctive colors?" 2. If athletes wanted to increase their endurance by increasing their oxygen-carrying capacity. how might they accomplish this increase 3a. Would you expect a flightless bird, such as an ostrich or turkey, to have a preponderance of dark meat (dark meat being rich in myoglobin) in its wings or its legs? 3b. What about a bird of flight, such as a duck or a hawk? 4a. How could gene-therapy, where a normal gene is substituted for a defective copy of a gene, help individuals inflicted with sickle-cell anemia? 4b. Similarly, how could gene therapy be used for those individuals who have vitamin B12 carrier protein disease?

Explanation / Answer

1. Myoglobin and hemoglobin are both metalloproteins that are associated with oxygen transport in muscles and other cellular parts through blood. The iron containg heme group of both myoglobin and hemoglobin is responsible for the distinct red brown color.

The heme group is composed of a protoporphyrin complex with an iron atom in it's center. This iron group gives the distinct color.

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