Use the Following Information to Answer the Questions Below

question 60

Multiple Choice

Use the following information to answer the questions below.
Nucleotides can be radiolabeled before they are incorporated into newly forming DNA and can therefore be assayed to track their incorporation. In a set of experiments, a student-faculty research team used labeled T nucleotides and introduced these into the culture of dividing human cells at specific times.
-The drug cytochalasin B blocks the function of actin. Which of the following aspects of the animal cell cycle would be most disrupted by cytochalasin B?

• A) spindle formation
• B) spindle attachment to kinetochores
• C) DNA synthesis
• D) cell elongation during anaphase
• E) cleavage furrow formation and cytokinesis

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