Cell Biology Final Essay

30093 Words Apr 26th, 2012 121 Pages
Name: _Leroy Johnson __________________________________ Date: ______________Comprehensive Study Guide. Test will only be Multiple choice

1. The feature that most clearly separates eukaryotes from prokaryotes is the presence of _______ in eukaryotic cells. A) ribosomes B) oxidative phosphorylation C) DNA molecules -D) a nucleus

2. Cytoplasmic organelles are
- A) absent in prokaryotic cells; present in eukaryotic cells. B) present in both prokaryotic and eukaryotic cells. C) present in prokaryotic cells; absent in eukaryotic cells. D) absent in both prokaryotic and eukaryotic cells.

3. Eukaryotic chromosomes contain _______ DNA molecules. A) single linear B) single circular -C) multiple linear D)
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A) True B) False

22. The two major groups of prokaryotic cells are the _______ and the _______, which diverged early in evolution. archaebacteria; eubacteria

23. Connective tissues of animals include _______, _______, and _______. bone; cartilage; adipose tissue

24. List four significant differences that distinguish prokaryotic cells from eukaryotic cells.

25. The formation of a phospholipid bilayer membrane around a set of macromolecules was an important step in the origin and early evolution of life. What two advantages of such a system are thought to have allowed the first cells to grow and evolve? (1) The membrane forms a (semipermeable) barrier between the interior of the cell and its environment, and (2) it allows a cell to grow and evolve as a unit, instead of existing as isolated molecules.

26. E. coli is a good model system for molecular biology studies because A) it has a small genome. B) it reproduces rapidly. C) mutants can easily be isolated from culture dishes. D) All of the above

27. A yeast cell divides in culture about every A) 20 minutes. B) 2 hours. C) 12 hours. D) 24 hours.

28. How many genes does the yeast nuclear genome contain? A) 1000 B) 6000 C) 10,000 D) 20,000

29. The adult nematode worm Caenorhabditis elegans consists of _______ somatic cells. A) 95 B) 959 C) 9,590 D)

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