BIO 202 Spring 2000 - 1 BIO 202 EXAM 3 SPRING 2000 1 Cells...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 BIO 202 - EXAM 3 - SPRING 2000 1) Cells of eukaryotes (e.g. humans) are different from prokaryotic cells (e.g. bacteria) in which of the following ways? a) Eukaryotic chromosomes are circular, prokaryotic chromsomes are linear. b) Eukaryotic cells have a nucleus, prokaryotes do not have a nucleus. c) Eukaryotic cells divide more frequently than prokaryotic cells. d) All of the above. 2) During which phase of the cell cycle is DNA synthesized? 3) What happens to chromosomes during metaphase of mitosis? 4) Which of the following is NOT involved in orchestrating the behavior of chromosomes during mitosis? 5) Experiments that involve fusing cells that are two different stages of the cell cycle provided evidence for cytoplasmic signals such as MPF (M-phase promoting factor) that regulate the progression through the cell cycle. In the experiment described in your textbook, a cell in M phase is fused with a cell in G1. The result of this fusion is: a) The nuclear envelope from the donor cell that was in M phase breaks down. b) The nuclear envelope from the donor cell that was in G1 breaks down. c) The chromosomes from the donor cell that was in M are replicated. d) The chromosomes from the donor cell that was in G1 are replicated.
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 6) MPF triggers the transition from the G2 to M phases of the cell cycle. The increase in MPF activity at this stage of the cell cycle is due to: a) an increase in the abundance of cyclins. b) an increase in the abundance of CDKs (cyclin-dependent kinases). c) the breakdown of the nuclear envelope. d) the alignment of sister chromatids on the metaphase plate. 7) The loss of normal cell cycle control is central to the uncontrolled growth of cancer cells. One example of this is the loss of 'density-dependent inhibition' of cell division of cells in culture. What is 'density-dependent inhibition'?
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern