Chapter 47 Question 12 1 of 3 In order to test how sea urchin sperm bind to eggs

Question

Chapter 47 Question 12 1 of 3 In order to test how sea urchin sperm bind to eggs, scientists isolated the egg receptor protein that binds to the sperm acrosomal protein called bindin. Plastic beads were coated with egg receptor for bindin (ERB1) from eggs of the sea urchin Strongylocentrotus purpuratus, and then the beads mixed with sperm from S. purpuratus or from the related species, S. franclscanus. The researchers counted how many sperm were bound to each bead. The results are shown in the graph below. (Adapted from Kamei and Glabe 2003) Treatments: A: S purpuratus sperm mixed with S. purpuratus ERB1 beads B: S. purpwatus sperm mixed with beads containing no ERB1 protein C: S. franciscanus sperm mixed with S. purpuwatus ERB1 beads D: S. franciscanus sperm mixed with beads containing no ERB1 protein Treatment A TreatmentB Treatment C Treatment D Fold sperm dilution Based on the description of the experiment, which of the treatments would be considered a "control" treatment for S. purpuratus sperm binding? Treatment A Treatment B Treatment C Treatment D

Explanation / Answer

Based on the description of hte experiment, which of the treatments would be considered a "controll" treatment for S. purpuratus sperm binding?

B) Treatment B

S. purpuratus sperm mixed with beads containing no ERB1 protein.

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