MCDB_1AL_Quiz_2_2009

MCDB_1AL_Quiz_2_2009 - Name TA MCDB 1A Lab Quiz 2 November...

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Name _________________________ TA ________________________ MCDB 1A Lab Quiz 2 November 2-6, 2009 Scantron Instructions: 1. Use a #2 pencil to complete the form. 2. Write your name and fill in the appropriate bubbles. 3. Write your perm. number in the ID number box and fill in the bubbles. 4. Fill in the entire rectangle of the answer you choose. If you erase, erase completely READ ALL QUESTIONS CAREFULLY; CHOOSE THE BEST ANSWER 26 Questions worth 1 Point Each (Unless noted otherwise) 1. Which phase of mitosis is this cell in? (worth 0.5 points) A. Interphase B. Prophase C. Metaphase D. Anaphase E. Telophase 2. What organelle is indicated by the pointer (worth 0.5 point) A. nucleus B. vacuole C. plastid D. cell wall E. cell plate 3. The region of the embryo indicated by the pointer will form which parts of the adult sea star body? A. Muscle B. Internal organs C. Blood vessels D. Nervous system E. Skeleton 4. The stage of development of the embryo shown in question #3 is the: A. Gastrula B. Morula C. Blastocoel D. Archenteron E. Blastula MCDB 1A Lab Quiz 2 Version: 0 Page: 1
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5. This figure was published in the Proceedings of the National Academy of Science it shows the same polytene chromosome stained for RNA Polymerase (appears white in the top figure), and Aceto-orcein, the dye you used in lab (on the bottom). This data is consistent with the claim that the regions of the chromosome that do not stain with aceto-orcein are sites where ______________ is occurring. A. Transcription B. Translation C. Segregtion D. Replication E. Repression of gene expression MCDB 1A Lab Quiz 2 Version: 0 Page: 2
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6. You have observed that tyrosinase from mushrooms is inactivated by incubation with 50 mM SDS. In order to explain this result you hypothesis the following: SDS causes a change in the structure of tyrosinase which alters its activity You test this hypothesis by incubating the enzyme in different concentrations of SDS and then measuring its activity. You obtain the following data. These data support which of the following statements:
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This note was uploaded on 02/13/2011 for the course MCDB 1a taught by Professor Feinstein during the Fall '08 term at UCSB.

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MCDB_1AL_Quiz_2_2009 - Name TA MCDB 1A Lab Quiz 2 November...

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