Ion channels are lined with amino acids that create a selectivity filter, allowing only certain ions to pass based on their size and charge.

Caribou are adapted to live in the Arctic, which means their cells are functional in extreme cold. Based on your knowledge of cell membranes, which prediction would you make about the lipid bilayer of caribou cells?

For each of the following sentences, fill in the blanks with the best word or phrase selected from the provided lists. Not all words or phrases will be used; each word or phrase should be used only once. AbsorptionCondenser Embedding GFP fusion protein GFP reporter line FixationFluorescent moleculeIntensity MagnificationMicrotome Numerical Aperture (N.A.)ResolutionSlicerStainingWavelength

If a Ras GTPase mutant is locked in an activated state (as often occurs in cancer), is there more likely a loss-of-function mutation in the GEF or the GAP?

Use the drop down menu to select the best word or phrase matching each description, or matching the colored structure in each image. Not all words or phrases will be used; each word or phrase will match only one image or description.   A GTPase that forms a spiral around the neck of a budding clathrin-coated vesicle, constricting to allow membrane fusion and vesicle release. Coiled-coil proteins that form long tethers with Rab binding sites, these are distinct on each Golgi stack to capture different vesicles.

As Paloma and her family drove from Chicago to Orlando, they played a game of counting the number of McDonald’s golden arches they saw along the way. The arches are McDonald’s

Mairead is planning to hike across Canada. She wants to make sure the hiking boots she chooses are the best ones for her adventure, so she is spending a considerable amount of time comparing alternatives. Mairead is purchasing what type of product?

Zappos, an online shoe company, knows shoes are typically a(n) ________ good, with consumers often spending time comparing alternatives. It overcomes that aspect of consumers’ search process by offering a free, no-questions-asked return policy.

During the________ stage of the product life cycle, sales peak and profits begin to decline as competition becomes intense.

When Chloe, an athletic trainer, invented a new heart monitor for runners, she could expect during the introductory stage that