Work through the eight stations in order. You'll see why eukaryotic cells divide their work into compartments, then follow one insulin molecule through the cell's shipping network and find out what happens when part of it breaks.
Imagine two workplaces. In one, every job happens in the same big room. In the other, a factory has separate rooms for each job. Switch between them, then see how the idea maps onto a cell.
A pancreatic cell makes insulin, a protein hormone that must be released into the bloodstream. Which cell structures do you think will be involved? Check all that apply. You'll compare your prediction with the real pathway at Station 4.
This table is built from Table 4.1 in your reading. Tap each cell to cycle through Yes, No, and Some, then check your work. The first row is done as an example.
| Cell component | Prokaryotes | Animal cells | Plant cells |
|---|
Prokaryotic DNA is found in the , while eukaryotic DNA is enclosed in the .
Compared with eukaryotic cells, prokaryotic cells are generally .
Examples of prokaryotes are .
This is Figure 4.8 from your reading. Click any organelle, or its label, to see its structure, function, and connections. Use the cards to fill in your guided-notes chart. Organelles it works with light up in orange.
Guide one insulin molecule out of a pancreatic cell. Before each move, predict where it goes next. The figure is Figure 4.18 from your reading. Watch the purple sugar chain grow as the protein is modified.
Figure 4.18The endomembrane system, from your reading. The marker is our insulin molecule: a purple wavy line while it is still mRNA, then a teal protein. Purple dots are sugar chains added in the ER and Golgi; the tan ring is a vesicle membrane.
Use the arrows to put the seven steps in order, 1 to 7.
Not every protein enters the endomembrane system. For each protein order, decide where it is mainly made. Think about where the protein needs to end up.
Pick one part of the cell to knock out. Write your prediction, then run the cell and watch where the insulin gets stuck. Test at least three knockouts, including one from the bonus row.
Your reading opens with the phrase “form follows function.” A cell's organelle mix reveals its job. Each mystery cell below shows how much of each structure it has. Match it to its job.
Answer on your own. Write your answer before you open the model answer.
Define in your notes: microfilament, intermediate filament, microtubule, centrosome, cilia, flagella. Then answer: how could an internal network of protein fibers help a cell keep its shape or move? One hint from today: secretory vesicles need a way to travel to the plasma membrane.
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