A child is diagnosed with DiGeorge syndrome (DGS). With which of the following would the child have serious immunological problems?

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#Question id: 28798

#Unit 2. Cellular Organization

To nucleate the assembly of branched actin filaments, Arp2/3 needs to be activated by___

a) Formins protein

b) nucleation promoting factor (NPF)

c) actin-nucleating proteins (ANP) 

d) Act A protein

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#Question id: 1235

#Unit 4. Cell Communication and Cell Signaling

Arrange the following events in the proper order in which they occur during transduction of the EGF signal:

a. transphosphorylation of the EGF receptor

b. dissociation of GDP from Ras                   

c. dissociation of Ras from Sos         

d. binding of GRB2 to the EGF receptor      

e. binding of GTP to Ras  

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#Question id: 4045

#Unit 3. Fundamental Processes

Predict the outcome of the removal of the N gene from the DNA sequence of the lambda phage: ___

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#Question id: 28310

#Unit 5. Developmental Biology

In case of mouse cumulus cells secrete a substance that attracts sperm and hyperactivates them through CatSper channels, these substance is___ 

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#Question id: 11430

#Unit 2. Cellular Organization

For GLUT1 in the human erythrocyte membrane, the Km for glucose transport is 1.5 mM. Thus when the extracellular glucose concentration is 1.5 mM, roughly half the GLUT1 transporters with outward-facing binding sites will have a bound glucose, and transport will occur: