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Good Luck BIO 101 Unit 3 Exam Summer 2025 - Version A Name: Date:_ Please complete the following multiple-choice questions by marking the correct letter on the ScanTron. Multiple choice answers on this test will only be graded via ScanTron. There is only one correct answer for each question. Indicate the exam version on the Scan Tron. Multiple Choice 2.37 each 1. The longest phase of the cell cycle is S phase b. Cytokinesis c. Mitosis d. Interphase e. G1 2. DNA replication occurs in a. the S phase of interphase in both somatic and reproductive cells b. the cytokinesis portion of the cell's life cycle c. prophase of both mitosis and meiosis d. the G1 phase of interphase in reproductive cells only e. metaphase of meiosis only 3. The cell cycle is controlled by signals that both promote and inhibit cell division. An example of this normal coordination of promotion and inhibition would be a. Proto-oncogenes and Tumor Suppressor Genes b. Programmed cell death and Apoptosis . Caspases enzymes and Engulfing cell fragments by WBC's d. The absence of Cyclins e. Proteins that force Apoptosis 13dmun ORPeaiw! willw lloo e 4. The role of apoptosis in the body is digearl to a a. It increases cell numbers b. Help to identify normal cell division leenrivaled to brie art IA F c. It protects the body against potentially abnormal cells llop biolqib mal .s d. Increases signal transduction pathways biolgib owl .d e. Aids in forming the cleavage furrow during Telophase so biolget owl b 5. DNA wound around histone proteins is called a. Ribosomes b. Centimorgan c. Centrosomes d. Centrioles e. Chromatin 6. During mitosis, centromeres holding together sister chromatids separate forming two a. Organelles b. Daughter chromosomes c. Microtubule fibers d. Mitotic spindles e. Homologous chromosomes 1