In the pyrimidine ring system, what is the source of the carbons 4,5 and 6 during the de novo biosynthesis of pyrimidines?

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#Question id: 24654

#Unit 2. Cellular Organization

Which of the following is not an example of an ion transporter?

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#Question id: 24655

#Unit 2. Cellular Organization

Which of the following integral membrane protein transport chemotherapeutic drug out of the cell and prevents their accumulation within a tumor and thus blocks their therapeutic effects?

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#Question id: 24656

#Unit 2. Cellular Organization

What is the “signature sequence” that is highly conserved in all K+ channels?

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#Question id: 24657

#Unit 2. Cellular Organization

Valinomycin, which is one of the best characterized ionophores, specifically transports

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#Question id: 24658

#Unit 2. Cellular Organization

Each monomer of aquaporin1 has six transmembrane helical segments and two shorter helices, both of which contain the sequence:

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#Question id: 24659

#Unit 2. Cellular Organization

Which two organelles are responsible for producing phospholipids and sphingolipids?