Answers

Unit 3: Link and Think


1.

Organism	Horse	Tuna	Moth	Wheat	Rice
Number of differences with dog	0	3	6	11	10

2. 8, GNPKAGEKIFKTKCAQCHTVDKG

3.

Organism	Horse	Tuna	Moth	Wheat	Rice
Number of differences with horse	0	3	6	11	10
Number of differences with tuna	3	0	7	12	12
Number of differences with moth	6	7	0	9	11
Number of differences with wheat	11	12	9	0	3
Number of differences with rice	10	12	11	3	0

4. The tuna. Tuna and horse both have backbones; moths do not.

5. Tuna, yeast, rice; 82%, 63%, 62%; rice and yeast

6. NPKKYIPGTKM, 70

7. Cytochrome c is a mitochondrial protein that plays a vital role in electron transport. It contains several helical segments and is bound to a heme group. Cytochrome c contains a histidine that is important for the activity of the protein. Histidine is abbreviated as H.

8. The histidine in question occupies the 18th position of cytochrome c.

9. Position 80.

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