BIO 349 sample exam fall 95

BIO 349 sample exam fall 95 - BIO 349 Developmental Biology...

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BIO 349 Developmental Biology (K. Kalthoff) Exams Fall 1995 First Midterm Exam (3 October 1995) MULTIPLE CHOICE (1 point each) In the following questions or statements, circle the letter associated with the one answer or version of the statement that you consider to be the most adequate. 1. The animal egg pole is characterized by a. a polar lobe b. polar bodies c. polar granules d. none of the above is correct 2. The part of the mammalian blastocyst that contributes to the placenta is called a. amnion b. inner cell mass c. trophoblast d. none of the above is correct 3. In species with regulatory development, a normally proportioned larva may develop from a. an isolated blastomere b. two early embryos stuck together c. both of the above are correct d. none of the above is correct 4. Vitellogenesis and RNA synthesis in oocytes occur during a. prophase of first meiosis b. prophase of second meiosis c. after fertilization d. none of the above is correct 5. The direction of coiling in the snail, Lymnea peregra, is determined by the a. genome of the embryo b. maternal genome c. paternal genome d. all of the above are correct 6. The activity of a localized cytoplasmic determinant is proved by a. the unequal distribution of a visible cytoplasmic component b. heterotopic transplantation c. both of the above are correct d. none of the above is correct 7. Anterior determinants in dipteran embryos are thought to be a. microtubules b. mitochondria
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c. pigment granules d. RNA-containing particles 8. Discoidal cleavage is characteristic of a. birds b. insects c. mammals d. none of the above is correct PICK THE ODD STATEMENT (1 point each) For the following questions, either three of the statements are correct and one is false, or three are false and one is correct. Pick the one odd statement, be it correct or false, and circle the respective letter. 9. Germ Cell Development a. The maturation of male and female gametes differs in the number of meiotic divisions. b. Spermatocytes may form clones of interconnected cells. c. Histones in oocyte nuclei are replaced by protamines. d. Insect oocytes receive a rich supply of RNA from follicle cells. 10. Nuclear Transplantation Experiments with Amphibians a. Blastula nuclei transplanted into oocytes synthesize RNA. b. Brain cell nuclei transplanted into eggs synthesize DNA. c. Frog kidney nuclei transplanted into newt oocytes synthesize frog oocyte RNA. d. Frog kidney nuclei transplanted into newt oocytes synthesize newt oocyte RNA. 11. Lens regeneration a. Urodeles can regenerate a lens from dorsal iris epithelium. b. This regeneration is accomplished by reorganizing the iris tissue without cell division and growth. c. Enzymes in the iris cells transform retina pigment into lens crystallin. d. Mammals can regenerate eye lenses in a similar way.
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BIO 349 sample exam fall 95 - BIO 349 Developmental Biology...

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