Michigan Test for Teacher Certification (MTTC) Secondary Integrated Science Practice test

Which of the following is NOT a step in mitosis or meiosis?

1. Prophase

2. Cytokinesis

3. Interphase

4. Anaphase

The correct answer is: Interphase

Interphase is accurately identified as not a step in mitosis or meiosis because it is the phase that precedes these processes. Interphase is a stage of the cell cycle where the cell prepares for division, and it encompasses the G1, S, and G2 phases. During this time, the cell grows, synthesizes DNA, and prepares the necessary components for mitosis or meiosis. In contrast, prophase, anaphase, and cytokinesis are critical steps involved in either mitosis or meiosis. Prophase involves the condensation of chromatin into visible chromosomes and the formation of the mitotic spindle. Anaphase is the phase where sister chromatids or homologous chromosomes are pulled apart to opposite poles of the cell. Cytokinesis is the final step in which the cytoplasm divides to form two separate daughter cells, completing the process of cell division. Therefore, interphase is correctly excluded as it does not constitute a part of the mitotic or meiotic divisions themselves.