Francesca s immune system has begun to turn against normal body tissues, which is referred to as __________." selective optimiza

Answer:

The correct choice is A............

Answer:

1. A

2. D

3. A

4. A

5. A

Explanation:

Response:

This is a request to mark it on branliys

Clarification:

Each subunit of a hemoglobin protein contains a heme group, and since a hemoglobin protein comprises four subunits—two α and two β—we can calculate the total number of heme groups by multiplying four (the number of heme groups per hemoglobin) by three (the total hemoglobin molecules considered). Hence, 4 × 3 = 12.
This means that three hemoglobin protein molecules possess twelve heme groups.