Multiple Choice
The kinetochores are:
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11. Cell Division
Introduction to Cell Division
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The movement of chromosomes during anaphase would be most affected by a drug that:
A
prevents the shortening of microtubules
B
inhibits DNA replication
C
blocks the formation of the nuclear envelope
D
stimulates the synthesis of ribosomal RNA
Verified step by step guidance1
Understand the role of microtubules during anaphase: Microtubules are part of the spindle apparatus that helps separate sister chromatids by shortening and pulling them toward opposite poles of the cell.
Analyze the effect of preventing the shortening of microtubules: If a drug prevents microtubules from shortening, the chromatids would not be able to move to opposite poles, disrupting chromosome segregation during anaphase.
Evaluate the role of DNA replication: DNA replication occurs during the S phase of the cell cycle, not during anaphase. Inhibiting DNA replication would affect earlier stages of the cell cycle, not the movement of chromosomes during anaphase.
Consider the formation of the nuclear envelope: The nuclear envelope reforms during telophase, not anaphase. Blocking its formation would not directly affect chromosome movement during anaphase.
Assess the synthesis of ribosomal RNA: Ribosomal RNA synthesis is related to protein production and occurs in the nucleolus. Stimulating its synthesis would not directly impact chromosome movement during anaphase.
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