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Free CLEP Science and Mathematics Exam Braindumps (page: 26)

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PDF with 494 Questions

A diagram of the cell cycle of the eukaryotic species C. elegans is shown below.


During "S" phase of the cell cycle, C elegans cells are:

  1. growing larger
  2. dividing into two new cells.
  3. in a period of dormancy
  4. copying ONA and organelles
  5. synthesizing large amounts of ATP

Answer(s): D

Explanation:

S phase is "synthesis" phase, but not of more ATP than usual. During S phase, cells copy their DNA and organelles in preparation for cell division, which takes place during M phase, or mitosis.



A diagram of the cell cycle of the eukaryotic species C. elegans is shown below.



During which of the following phases docs the nuclear membrane of the cell start to break apart so that chromosomes will be able to move to opposite sides of the dividing cell?

  1. Interphase
  2. Prophase
  3. Metaphasc
  4. Anaphase
  5. Telophase

Answer(s): B

Explanation:

It is during the first phase of mitosis, prophase that the nuclear membrane breaks down.



A diagram of the cell cycle of the eukaryotic species C. elegans is shown below.


At the very end of mitosis, two daughter cells will be created by a process that pinches one cell in two. This process of pinching is called

  1. cytokinesis
  2. cytolysis
  3. cytosolic pinching
  4. endocytosis
  5. exocytosis

Answer(s): A

Explanation:

The pinching off of one cell to create two new cells at the end of mitosis is called cytokinesis.



A diagram of the cell cycle of the eukaryotic species C. elegans is shown below.



During all the following phases of the cell cycle, C elegans will have its DN A in a replicated state, EXCEPT:

  1. G1
  2. S
  3. G2
  4. M
  5. all of interphase

Answer(s): A

Explanation:

DNA is copied during S phase, so G1 is the only phase during which DNA is still uncopied.






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