Quiz 3 for BSC 1005 with Correct Solutions

Quiz 3 for BSC 1005 with Correct Solutions Every living cell on the planet is enclosed by a - Answer️️ -lipid bilayer cell membrane. Viruses are members of which one of the three Domains of living organisms? - Answer️️ -- Archea - Bacteria - Eukarya - None Answer: NoNE: Viruses are not considered to be living organisms, and therefore are not classified with other living organisms into any of the three Domains that we put all other living things. The cellular cytoskeleton of eukaryotes contains which of these types of protein fibers? - Answer️️ -If it isn't microtubules, intermediate filaments, and microfilaments (actin filaments), then it's wrong. Those 3 are the three types of protein fibers. Which structures within a cell are responsible for making (or more accurately, recharging) the ATP molecules used for cellular energy? - Answer️️ -mitochondria ; The mitochondria are the cellular power plants. The Cell Theory of Schleiden and Schwann was very important in establishing that... - Answer️️ -all living things are composed of at least one living cell. Page 2 of 6 What is it that viruses cannot or will not do that causes them to be defined as a separate group of organisms, and not as true, living cells? - Answer️️ -They cannot replicate themselves or reproduce without being inside a living cell. (Virus particles do not have the machinery for replication or reproduction. That is why they must invade living cells. The virus particles are using the replication machinery of the living cells to do the work that the virus cannot do. Viruses do use RNA and DNA just like cells. They do assemble proteins just like cells. And they do have structure to their particles (although they do not have a lipid bilayer cell membrane like all other living cells).) Based on the results of your iodine and methylene blue staining in the cell lab, would you say that plant cell walls are permeable or impermeable to water and other solutes (molecules dissolved in water)? - Answer️️ -permeable ; The best evidence for permeability of the cell wall is the iodine being able to stain the starch granules inside the potato cells. But you also were able to see the iodine get inside the onion cell and stain the nucleus yellow/gold. Cilia, flagella, and pseudopodia are all involved in... - Answer️️ -movement or motion of the cell in its normal environment. Lysosomes are compared to what type of human-manufactured device? - Answer️️ - Garbage disposal What is assumed to be the advantage of the long, folded inner membrane of the mitochondria? What do the folds of the inner membrane do to make the mitochondrion more efficient? - Answer️️ -increased surface area for cell respiration reactions. (It is thought that the folded inner membrane increases the surface area, which is the surface Page 3 of 6 area of the mitochondria on which ATP is actually created via the Electron Transport Chain.) What is one cell type in the human body that does not contain any mitochondria? - Answer️️ -red blood cell (Mature red blood cells do not contain any mitochondria. In fact, red blood cells don't really have any of the major organelles, in