Unit 1: Cells as Organisms vs. Social Systems – and Technology
1. The paramecium discussed in class contained an organelle called the contractile vacuole.
This is the presumed precursor of the: kidney.
2. In your own multicellular body, cells with different functions have different DNA. False
3. In Cell Biology what can limit the progress of science? Technology
4. A single-celled eukaryotic organism: Has a limited number of biomolecular
machines; must find food, shelter, a mate and reproduce; escape from predators
5. The contractile vacuole of the paramecium is possibly an evolutionary precursor of the
kidney. True
6. Compared to bacteria which of the cell types below are not responsible for finding food”:
Lymphocyte, macrophage, fibroblast
7. In your own multicellular body, different cells in your body have a division of labor
between them. True
8. Comparing a single-celled eukaryotic organism with a multicellular organism such as
yourself identify the major difference from the list below. Division of labor
9. In order to examine cells which are smaller than can be detected by the human senses
what needs to be used? Technology
10.What limits the paramecium from acquiring more complex functions?
Its single-cell structure does not allow for the division of labor because it must
meet all of its needs on its own.
11.The paramecium swims by way of using a flagella. False
12.Write a few sentences that explain what limits an individual cell from becoming more
complex.
An individual cell (eukaryote) must perform all functions required to survive
independently. In other words, its entire existence is spent trying to sustain
itself on its own. Without the help of other cells, its energy is focused on
meeting its needs to survive rather than expanding or becoming more complex
in its functions.
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, Unit 2: Cells Walking and Cancer; Evolution of the Primitive, Proto-Eukaryotic
Cell and Technology
1. A normal cell is mortal and anchorage dependent for growth.
2. The cytoskeleton gave rise to the nuclear envelope. False
3. In an extant prokaryotic cell, the outer boundary of life is the capsule. False
4. What limits how big a cell can be? The surface area to volume ratio
5. The end of the retraction fiber touching the cell culture plate still contains the cell
equivalent of super-glue. True
6. Motility improved the fitness of these early cells because: It allowed them to move
away from predators and towards food.
7. List one limitation of the cell culture technique. Not all cells grow in culture.
8. Loss of the cell wall is required for the endosymbiotic theory. True
9. Why is it important to know the limitations of technology?
By knowing what technology can and cannot do, they can compensate for the
shortcomings of existing technology to create something cutting edge.
10.Ribosomes bound to some of the membrane invaginations in the endomembrane theory.
True
11.The presumed first step in the transition of the primitive, proto-prokaryotic cell into the
primitive, proto-eukaryotic cell was the loss of the cell wall. True
12.When cancer cells are crowded by surrounding cells, the cancer cells become spherical
and they can still go through cell division. True
13.After a cell is pancake shaped in a cell culture dish, the order of events that occurs as a
cell walks is (pick the best order): Filipodia, lamellipodia, cell muscle, retraction
fiber.
14.TEM provides a thin, two-dimensional section of the object being studied. True
15.It is presumed that the peroxisomes evolved in these primitive, proto-eukaryotes to
remove oxygen, which was toxic to the primitive cells. True
16.The association of ribosomes with membrane invaginations would support
the endomembrane theory.
17.DNA in extant prokaryotic cells is circular. True
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