Serine and threonine are to ........  as tyrosine is to receptor tyrosine kinases.

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#Question id: 15331

#Unit 4. Cell Communication and Cell Signaling

B-cell surface contain marker_______

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#Question id: 5790

#Unit 8. Inheritance Biology

The codon for leucine is CUC. How many different amino acids could possibly result from single-base substitutions?

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#Question id: 31381

#Unit 13. Methods in Biology

Patch clamping can be used to measure the conductance properties of individual ion channels. How can patch clamping be used to determine whether the gene coding for a putative K⁺ channel actually codes for a K⁺ or a Na⁺ channel?

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#Question id: 23684

#Unit 13. Methods in Biology

How does a bacterial cell protect its own DNA from restriction enzymes?

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#Question id: 2236

#Unit 2. Cellular Organization

The partition coefficient K, the equilibrium constant for partitioning between oil and water, for butyric acid is about 10^–2, and for 1,4-butanediol it is about 10^–4.  You add liposomes containing only water to a solution with an initial concentration of 1 mM butyric acid and 100 mM 1,4-butanediol outside the liposomes.  What is the relative rate of diffusion of the two substances into the liposome interior?