#Question id: 6975
#Unit 5. Developmental Biology
Which one of the following genes was NOT part of transcription factors used to generate induced pluripotent stem (iPS) cells from mouse skin fibroblasts?
#Question id: 27417
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 2800
#Unit 2. Cellular Organization
When chromatin is extracted from nuclei and viewed in the electron microscope, its form depends upon the salt concentration to which it is exposed. What is the form of chromatin when it is isolated in isotonic buffers, i.e. same salt concentration as in cells (about 0.15 M KCl)?
#Question id: 1219
#Unit 4. Cell Communication and Cell Signaling
Many G protein-coupled receptors contain seven transmembrane α-helical domains. The amino end of the protein lies at the exterior of the plasma membrane. Loops of amino acids connect the helices either at the exterior surface or on the cytosolic surface of the membrane. The loop on the cytosolic side between helices 5 and 6 is usually substantially longer than the others. Where would you expect to find the carboxyl end of the protein?
#Question id: 294
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following pairs of amino acids would you predict to only participate in Van der Waals interactions in the three dimensional folding of a protein: