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During which phase of the cell cycle does DNA duplication, or replication, take place? – interphase
When a double helix of DNA is replicated, two complete helices are formed. Together, these helices are called sister __________. – chromatids
During which phase of mitosis do sister chromatids line up at the center of the cell? – metaphase
During which phase of mitosis do the sister chromatids move apart? – Anaphase
During which phase of mitosis do nuclear envelopes and the nucleoli reappear? – Telophase
During which phase of mitosis do the nuclear envelope and nucleoli disappear? –Prophase
What is the name of the process by which the cytoplasm divides in two? - Cytokinesis
Which of the following is NOT one of the three major components of a typical eukaryotic cell? – Ribsome
Which of the following acts as the digestive system of the cell, breaking down materials? – lysosome
Where in a typical eukaryotic cell would you expect to find genes? - in the DNA within the cell’s nucleus
Which of the following statements about cells is FALSE? - Cells join together to form organelles, which then form our organs and organ systems.
Which of the following is the main component of the cell membrane? – phospholipids
Which of the following is a characteristic of the cell membrane? – semipermeable
Which of the following is not a major function of proteins in the cell membrane? - forming the entire glycocalyx
What part of a cell membrane is usually in contact with the interstitial fluid? - phosphate heads of phospholipids
What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? - In facilitated diffusion, molecules only move with the aid of a protein in the membrane.
Which of the following is least likely to increase the rate of diffusion? - small concentration gradient
In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? - isotonic

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