Exam I 2005 - :> i i BIO321 Fall 2005 Exam 1 12. A...

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:> i i Questions 1 to 13 i The followingquestions ~ ontain statements that are either true or false. Choose A if the statement is true, or B if the statement is false. 1. All eucaryotic cells hav1 one nucleus. A. True B.False I 2. Procaryotes evolved froin eucaryotic mitochondria. A. True B. False I I I 3. Although most types of ~Ollagenassemble into fibrils, type IV collagen assembles into a feetlike network that forms the core of all basal lamina. ! A. True B.False I BIO321 Fall 2005 Exam 1 - 4. Gap junctions connect l ' e cytoskeletalelementsof one cellto a neighboring cell or the e tracellular matrix. A. True B. False i. I 5. The nucleus contains allithe DNA, but not all the RNA in a cell I A. True B. False , I 6. Body plans of early embkos from different species look remarkably similar. It is O ~ later in embryonic development that these similarities begi to disappear. The reasons why body plans resemble each other ough phylogeny isdue to conservation in genetic sw tches.fhat c~ntrol fundamental cellular rearrangements during dev lopment. A. True B.False I 7. One function of desmos~mes is to provide strength to an epithelial sheet that prevents cells from ripping apart- A. True B.False I 8. In terms of phospholipid composition, the plasma membrane lipid bilayer is asymmetricj A. True B. False i 9. A cell will only adhere t f another if there are;adhesion molecules on the surface 0 the other cell identical to its own. A. True B. False I , 10. Cholesterol makes me ~ ranes less fluid by limmobilizing the heads of neighboring lipid olecules, and prevCfntsphospholipids from solidifying at low te peratures A. True B. False I 11. One way to study the flpidity of the plasma fembrane is to use fluorescent antibodies t track the moveme1ts of integral proteins in the membrane ~nder different experimental conditions. ' A. True B. False 12. A desmosome bears the same relationship to a hemidesmosome that an adhesion belt does to a focal contact A. True B. False 13. All the different forms of NCAM and cadherins arise from different genes. A. True B. False Questions 14 to 36 The following questions are multiple choice type. 14. Proteoglycans are molecules found in A. the nucleus B. the extracellular matrix C. the cytoplasm 15. A major type of lipid found in cell membranes is A. phospholipids. B. steroids.
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This note was uploaded on 02/05/2012 for the course BIOLOGY BIO 320/32 taught by Professor Dr.c during the Spring '11 term at Murray State KY.

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Exam I 2005 - :> i i BIO321 Fall 2005 Exam 1 12. A...

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