Question

1. normal cell division is carefully controlled by (i) ____ that ensure each stage of the cell cycle is completed correctly. when these controls fail, cells may continue dividing without (ii) __, leading to the formation of a (iii) ____.

blank (i) blank (ii) blank (iii)
a. chromosomes e. cytokinesis g. organelles
b. centrioles d. regulation h. spindle fibers
c. checkpoints f. cell plate i. tumor

Explanation:

• Blank (i): Cell cycle checkpoints monitor and control the progression of the cell cycle to ensure each stage is completed correctly.
• Blank (ii): When controls (checkpoints) fail, cells divide without proper regulation.
• Blank (iii): Unregulated cell division leads to the formation of a tumor.

Answer:

C. Checkpoints, D. Regulation, I. Tumor