Preview Science Concepts Using Science Graphics Writing Skills

1. Preview • Science Concepts • Using Science Graphics • Writing Skills

2. 1. Prokaryotic chromosomes A. have two strands. B. are connected at the centromere. C. consist of a circular DNA molecule. D. are made of DNA wrapped around histone proteins.

3. 1. Prokaryotic chromosomes A. have two strands. B. are connected at the centromere. C. consist of a circular DNA molecule. D. are made of DNA wrapped around histone proteins.

4. 2. In what stage of the cell cycle is the DNA copied? F. G1 G. S H. G2 J. mitosis

5. 2. In what stage of the cell cycle is the DNA copied? F. G1 G. S H. G2 J. mitosis

6. 3. Mitosis could not proceed if a mutation interrupted the assembly of the A. cell wall. B. spindle fiber. C. cell membrane. D. nuclear envelope.

7. 3. Mitosis could not proceed if a mutation interrupted the assembly of the A. cell wall. B. spindle fiber. C. cell membrane. D. nuclear envelope.

8. 4. What might happen if cytokinesis were omittedfrom the cell cycle? F. The daughter cells would die. G. The cell would lose its mitochondria. H. The daughter cell would not have nuclei. J. The cell would not divide into two daughter cells.

9. 4. What might happen if cytokinesis were omittedfrom the cell cycle? F. The daughter cells would die. G. The cell would lose its mitochondria. H. The daughter cell would not have nuclei. J. The cell would not divide into two daughter cells.

10. 5. G1 checkpoint : DNA replication :: G2 checkpoint : A. mitosis B. cell size C. cytokinesis D. mistakes in DNA

11. 5. G1 checkpoint : DNA replication :: G2 checkpoint : A. mitosis B. cell size C. cytokinesis D. mistakes in DNA

12. This diagram shows a model of cell division. Use the diagram to answer the following question(s).6. What type of cell undergoes this type of cell division? F. a plant cell G. an animal cell H. a eukaryotic cell J. a prokaryotic cell

13. This diagram shows a model of cell division. Use the diagram to answer the following question(s).6. What type of cell undergoes this type of cell division? F. a plant cell G. an animal cell H. a eukaryotic cell J. a prokaryotic cell

14. The graph shows the number of cigarettes smoked per capita per year between 1920 and 2000 and the annual incidence of lung cancer among women. Use the graph to answer the following question(s).7. What was the relationship between the number of cigarettes smoked and the incidence of lung cancer? A. There was no relationship between cigarette smoking and lung cancer. B. As the number of cigarettes smoked decreased, the incidence of lung cancer increased. C. As the number of cigarettes smoked increased, the incidence of lung cancer increased. D. As the number of cigarettes smoked increased, the incidence of lung cancer decreased.

15. The graph shows the number of cigarettes smoked per capita per year between 1920 and 2000 and the annual incidence of lung cancer among women. Use the graph to answer the following question(s).7. What was the relationship between the number of cigarettes smoked and the incidence of lung cancer? A. There was no relationship between cigarette smoking and lung cancer. B. As the number of cigarettes smoked decreased, the incidence of lung cancer increased. C. As the number of cigarettes smoked increased, the incidence of lung cancer increased. D. As the number of cigarettes smoked increased, the incidence of lung cancer decreased.

16. 8. For a cell to function efficiently, its surface area must be high relative to its volume. Explain how cell division maintains the relationship between surface area and volume. How does a stable ratio of surface area to volume help maintain proper cell functioning

17. 8. For a cell to function efficiently, its surface area must be high relative to its volume. Explain how cell division maintains the relationship between surface area and volume. How does a stable ratio of surface area to volume help maintain proper cell functioning As cell size decreases, the ratio of surface area-to-volume increases. Cell division produces two smaller cells. With a stable ratio between surface area and volume, cells are able to maintain homeostasis efficiently through osmosis and diffusion.