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10.1 Cell Growth, Division, and Reproduction

10.1 Cell Growth, Division, and Reproduction. 1. As a cell’s size increases, it amount of DNA stays the same. 2. T The amount of activity in a cell is related to its volume. 3. F The smaller the cell, the larger its ratio of surface area to volume.

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10.1 Cell Growth, Division, and Reproduction

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  1. 10.1 Cell Growth, Division, and Reproduction

  2. 1. As a cell’s size increases, it amount of DNA stays the same

  3. 2. T The amount of activity in a cell is related to its volume.

  4. 3. F The smaller the cell, the larger its ratio of surface area to volume.

  5. 4. T The information crisis in a cell is solved by the replication of the DNA before cell division

  6. 5. The library represents the cell’s DNA.

  7. 6. Reproduction is the formation of new individuals.

  8. 7. For single-celled organisms, cell division is a form of asexual reproduction

  9. 8. Most multicellular organisms reproduce by sexual reproduction.

  10. Similarities Produce new organisms Transfer genetic material to offspring Differences Asexual produces genetic identical offspring Offspring from sexual reproduction get genetic information from both parents. Asexual cell separate in sexual cells join Asexual vs Sexual Reproduction

  11. 10. A cell cannot grow very large because if it did, it would be unable to transport needed materials into the cell and transport wastes out.

  12. Cell Division Why do your cells divide?

  13. How do cells grow and reproduce? • The cell cycle: • In prokaryotes – asexual reproduction, called binary fission – produces genetically identical cells (“clones”) • In eukaryotes – cell cycle can be broken down into distinct stages • Chromosomes – bundled DNA (look like an “x”) • Chromatin – DNA coiled with proteins (look like ball of yarn)

  14. Cell Cycle 1. Interphase – “normal” cells • Divided into G1, S, and G2 phases 2. Mitosis – division of the nucleus • Divided into 4 phases (prophase, metaphase, anaphase, telophase) 3. Cytokinesis – division of cytoplasm • In animals – cells pinch in two • In plants – cell cannot pinch due to cell wall • Cell plate forms instead

  15. DESCRIPTION: G1, S, G2 DESCRIPTION (DRAWING) (DRAWING) DESCRIPTION (DRAWING) DESCRIPTION (DRAWING) DESCRIPTION (DRAWING) DESCRIPTION (DRAWING)

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