Use the Following Information to Answer the Question

question 41

Multiple Choice

Use the following information to answer the question.
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. franciscanus. 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. purpuratus sperm mixed with beads containing no ERB1 protein
C: S. franciscanus sperm mixed with S. purpuratus ERB1 beads
D: S. franciscanus sperm mixed with beads containing no ERB1 protein

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

• A) Treatment A
• B) Treatment B
• C) Treatment C
• D) Treatment D

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Definitions:

Stop Payment

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Drawer

In banking and finance, refers to the party that writes and signs a check or draft, instructing their bank to pay a specified sum to the named party.

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Pertains to a financial instrument, such as a check or bill of exchange, that has been presented for payment and rejected.