Question 1 The image below shows a gel electrophoresis of DNA from a population of cells. This population of cells must be undergoing: Mitosis…

Question 1

  1. The image below shows a gel electrophoresis of DNA from a population of cells. This population of cells must be undergoing:
  2. Mitosis
  3. Meiosis I
  4. Meiosis II
  5. Apoptosis 
  6. Necrosis

0.5 points  

Question 2

  1. Which of the following is used during animal cell mitosis that is not used for cytokinesis?
  2. Dynein
  3. Kinesin
  4. Myosin
  5. Dynein and kinesin

0.5 points  

Question 3

  1. After Meiosis I, a typical animal cell is:
  2. diploid, with two copies of each homolog (2N,2X)
  3. haploid, with one copy of each homolog (1N,1X)
  4. diploid with one copy of each homolog (2N,1X)
  5. haploid, with two copies of each homolog (1N,2X)

0.5 points  

Question 4

  1. Which process(es) involve(s) segregation of sister chromatids?
  2. Meiosis I
  3. Meiosis II
  4. Mitosis
  5. Both meiosis I and mitosis
  6. Both meiosis II and mitosis

0.5 points  

Question 5

  1. A normal, proliferating cell (not a gamete) during G2 of the cell cycle is:
  2. diploid, with two copies of each homolog (2N,2X)
  3. haploid, with one copy of each homolog (1N,1X)
  4. diploid with one copy of each homolog (2N,1X)
  5. haploid, with two copies of each homolog (1N,2X)

0.5 points  

Question 6

  1. Given your knowledge of how DNA is replicated, which of the following DNA will be present after 100 generations in the Meselson-Stahl Experiment?
  2. 50% N14:N14 hybrids and 50% N14:N15 hybrids
  3. All of the DNA will be N15:N14
  4. Almost all of the DNA will be N14:N14, but a very small amount of N14:N15 will remain
  5. 25% N15:N15; 50% N14:N15; 25% N14:N14
  6. All of the DNA will be N15:N15

0.5 points  

Question 7

  1. The image below from the work of Meselson and Stahl illustrates that:
  2. DNA becomes more pure over time (e.g. many generations).
  3. DNA becomes more concentrated over many generations.
  4. DNA becomes more dense over many generations.
  5. DNA localizes according to its density after many hours of centrifugation.

0.5 points  

Question 8

  1. Imagine you are a graduate student trying to understand the genetics of osteosarcoma, a cancer of bone. You discover a novel mutation in a G1/S Cdk that correlates with the development of osteosarcoma in some people. Which of the following mutations would indicate that it contributes to the progression of cancer in these patients?
  2. One that prevents the Cdk from binding to ATP
  3. One that prevents the Cdk from binding to cyclin
  4. One that results in constitutive activation of the kinase
  5. All of the above

0.5 points  

Question 9

  1. Maturation promoting factor (MPF) and second messengers in signal transduction both:
  2. Appear in the cell in response to a signal.
  3. Are proteins.
  4. Activate protein kinase A.
  5. All of the above

0.5 points  

Question 10

  1. What is Maturation promoting factor (MPF)’s activity?
  2. Phosphorylation of proteins
  3. Transcription of S-phase genes
  4. GTP hydrolysis
  5. Inhibition of cyclin-Cdk complexes

 

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Question 1 The image below shows a gel electrophoresis of DNA from a population of cells. This population of cells must be undergoing: Mitosis… was first posted on August 14, 2020 at 10:24 pm.
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Question 1 The image below shows a gel electrophoresis of DNA from a population of cells. This population of cells must be undergoing: Mitosis… was first posted on August 14, 2020 at 10:29 pm.
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