#Question id: 28929
#Unit 4. Cell Communication and Cell Signaling
In the cytosolic destruction complex, Ci becomes phosphorylated and is proteolytically cleaved by the ubiquitin-proteasome pathway, generating an N-terminal fragment Ci75, which functions as___
#Question id: 26796
#Unit 8. Inheritance Biology
50 meiocyte has 5% recombinant frequency in their gametes A and B, then how many meiocyte undergo single crossing over
#Question id: 414
#Unit 1. Molecules and their Interaction Relevant to Biology
The hydrolysis of phosphoenolpyruvate proceeds with a DG'° of about –62 kJ/mol. The greatest contributing factors to this reaction are the destabilization of the reactants by electostatic repulsion and stabilization of the product pyruvate by:
#Question id: 2865
#Unit 2. Cellular Organization
The trp operon is controlled by repression and attenuation, providing a two-stage response to progressively more stringent tryptophan starvation. But attenuation alone can provide robust regulation: other amino acid operons such as leu and his rely entirely on attenuation for their control. Correct number of codons in leader peptide of leu & his operon in a row;
#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?