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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. - PowerPoint PPT Presentation
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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.
4. T The information crisis in a cell is solved by the replication of the DNA before cell division
5. The library represents the cell’s DNA.
6. Reproduction is the formation of new individuals.
7. For single-celled organisms, cell division is a form of asexual reproduction
8. Most multicellular organisms reproduce by sexual sexual reproduction.
Asexual vs Sexual Reproduction
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
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.
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)
Cell Cycle1. 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
Describe and draw the phase for animal cells*Include labels: chromosome, chromatin, spindle fibers, centriole, chromatid, nuclear envelope
Interphase
Prophase
Cytokinesis Metaphase
Telophase Anaphase
DESCRIPTION: G1, S, G2(DRAWING)
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