Author: Anonymous

A bear is preparing to hibernate. Its internal body temperature will drop significantly. To maintain normal membrane fluidity despite this temperature drop, you would expect the bear’s cells to incorporate __(A)__ unsaturated fatty acids and __(B)__ saturated fatty acids into their membranes.

Which of the following correctly describes one way that glycosylation impacts advancements in medicine?

Insulin is a molecule created by your pancreas that travels extensively through the bloodstream, regulating glucose uptake in cells throughout the body. What class of signaling is this an example of?

What is the structural difference between filopodia and lamellipodia?

You are a researcher studying yeast cells and discover a mutant strain that divides much more quickly than normal yeast and never grows as large as normal yeast cells before dividing. A good hypothesis for what gene is mutated in this strain is:

A scientist adds a non-hydrolyzable form of GTP (GMP-CPP) to a solution of tubulin heterodimers. What would she expect to observe, and why?

The diagram below shows the pathway by which mitogens reactivate the cell cycle in senescent cells. (Description of pathway: A mitogen binds its receptor → activates Ras → activates MAP kinase → increases transcription of Myc → Myc promotes transcription of Cyclin D → Cyclin D binds and activates G1-Cdk → activated G1-Cdk inactivates Rb protein → inactive Rb releases and allows activation of E2F → E2F promotes transcription of S-phase genes → S-Cdk is activated → DNA synthesis begins.) Question: A mutation occurs that causes Rb protein to be permanently inactive in a cell, even in the absence of a mitogen signal. What would you expect to happen in this cell?

Which of the following scenarios is an example of apoptosis rather than necrosis?

The Pebble smartwatch is an example of a product whose success can be attributed to late mover advantages. 

Ernesto the bike builder decides to purchase the manufacturer of aluminum bike frames in order to guarantee the supply of this key component. He has just engaged in downstream vertical integration.