bio 349 sample exam spring 96

bio 349 sample exam spring 96 - BIO 349 Developmental...

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BIO 349 Developmental Biology (K. Kalthoff) Exams Spring 1996 First Midterm Exam (20 February 1996) 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 correct one. 1. Bindin of sea urchin sperm is located a. in the acrosomal vesicle b. on the acrosomal process c. both of the above are correct d. none of the above is correct 2. The animal egg pole is characterized by a. polar bodies b. polar granules c. both of the above are correct d. none of the above is correct 3. The part of the mammalian blastocyst that gives rise to the embryo proper is called a. amnion b. inner cell mass c. yolk sac d. none of the above is correct 4. Nuclei from frog kidneys, upon transplantation into newt oocytes, support the synthesis of a. frog kidney-specific proteins b. frog oocyte-specific proteins c. newt oocyte-specific proteins d. all of the above are 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. 5. Egg activation a. The cascade of events following fertilization is called egg activation. b. The cortical granule reaction prevents the fertilizing sperm from falling off. c. The plasma membrane potential shifts temporarily from a negative resting potential to a positive fertilization potential. d. The rate of protein synthesis increases as part of egg activation. 6. Cleavage Pattern a. The cleavage pattern of an embryo is controlled by the positioning and orientation of the mitotic spindles. b. Mitotic spindles may be attracted to particular areas of egg cortex.
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c. The mitotic spindle tends to align itself perpendicular to the longest dimension of a cell. d. The cleavage plane is always perpendicular to the axis of the mitotic spindle. 7. Induction a. Induction is an interaction between cells or tissues that changes the determined state of at least one partner. b. The cell (tissue) that changes its state of determination is the inducing tissue. c. Most inductive interactions occur during oogenesis. d. The earliest inductive event in amphibian development is neural induction. 8. Mesoderm Induction in Amphibians a. The potency of equatorial (marginal) blastula cells to form mesodermal structures is acquired gradually during cleavage. b. Animal cells induce their vegetal neighbors to form mesoderm. c. Dorsal vegetal blastomeres induces neighboring equatorial cells to form notochord. d. Dorsal equatorial cells induce their lateral neighbors to form intermediate mesoderm.
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This note was uploaded on 08/24/2009 for the course BIO 349 taught by Professor Wallingford during the Fall '09 term at University of Texas.

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bio 349 sample exam spring 96 - BIO 349 Developmental...

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