Four identical PCR reactions were carried out in tubes named I, II, III and IV. Besides the usual mix of dNTPs, each of the tubes respectively contained Ɣ-32P dATP, β-32P dATP, α-32P dATP, α-32P dNTP and α-32P rNTP. Which one of the tubes will have radiolabeled PCR product?

#Question id: 19097

#Unit 6. System Physiology – Plant

#Question id: 5646

#Unit 5. Developmental Biology

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. 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?

#Question id: 1572

#Unit 4. Cell Communication and Cell Signaling

function of IL-10

#Question id: 2781

#Unit 2. Cellular Organization

How many genes are estimated to be in the human genome?

#Question id: 27959

#Unit 1. Molecules and their Interaction Relevant to Biology