Select all of the true statements regarding an atom. 

Use context clues to fill in the blanks (Position 1 refers to the first blank, etc.) with the most appropriate terms for the sentence to have meaning as a whole. Each term will only be used once or not at all.    Our home, _____1_____, is orbiting around the ____2______, the only such object in our ____3______, which is one such object orbiting in the _____4_____, one such object orbiting in the _____5_____, which is one such collection orbiting in the ______6____.

Where would all visible stars be circumpolar? 

Indicate whether each of the following mutations would likely promote (P) or inhibit (I) apoptosis in cells harboring the mutation(s). Your answer would be a four-letter string composed of letters P and I only, e.g. PPPI. (  ) Mutations in the pro-apoptotic effector Bcl2 family proteins Bax and Bak that prevent their association with the outer mitochondrial membrane. (  ) A mutation in the BIR domain of the IAP protein DIAP1 that prevents binding to either caspases or anti-IAP proteins. (  ) A mutation in the anti-IAP protein Reaper that prevents its binding to the IAP proteins. (  ) A mutation in the CARD domain of caspase-9 that prevents its binding to Apaf1.

The actin-nucleating protein formin has flexible “whiskers” containing binding sites that help recruit actin subunits in order to enhance polymerization by this protein. What protein would you expect to bind to these sites?

The following schematic diagram shows the activation of M-Cdk in mitosis. Indicate which proteins below correspond to those indicated as A to D in the diagram. Your answer would be a four-letter string. (  ) Wee1 (  ) CAK (  ) Cdc25 (  ) M-cyclin

Consider the in vitro motility assay using purified kinesin and purified polymerized microtubules shown in the Figure below. The three panels are images taken at 1-second intervals. In this figure, three microtubules have been numbered to make it easy to identify them. Which of the following statements about this assay is FALSE?

G-protein-coupled receptors (GPCRs) all have a similar structure with ____________ transmembrane domains. When a GPCR binds an extracellular signal, an intracellular G protein, composed of _________ subunits, becomes activated. _________ of the G-protein subunits are tethered to the plasma membrane by short lipid tails. When unstimulated, the α subunit is bound to ________, which is exchanged for _______ on stimulation. The intrinsic ________ activity of the α subunit is important for inactivating the G protein. _______ inhibits this activity of the α subunit, thereby keeping the subunit in an active state.   adenylyl cyclase                 cholera toxin           GTPase  AMP                                        diacylglycerol           phosphodiesterase ATP                                          five                                   seven  ATPase                                  four                                  three Ca2+                                                    GDP                                  twelve cAMP                                   GTP                                   two

What is the effect of defective or missing N-acetylglucosamine phosphotransferase on lysosomal protein sorting?

Which of the following choices reflects the appropriate order of locations through which a protein destined for the plasma membrane travels?