1042171585071 - Peter Obi Homework assignment #1: A total...

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Peter Obi Homework assignment #1: A total of 20 questions, worth of 40 points. Grading criteria: 1. Typed, front size 12, single space. 2. Correct answers, points deducted for errors. 3. I want to see full sentences not just words, diagrams or tables are exceptions. 4. If I see two identical sentences for the same question from two different students, I consider it plagiarism, and you will get a ZERO for this assignment. Chapter 2: Page 41 Questions and Problems 2.3 What are the principal differences between prokaryotic and eukaryotic cells? The main differences between prokaryotic and eukaryotic cells are the size, system complication, and where the hereditary information is located. Eukaryotic cells are at least 10 times bigger than prokaryotic cells, the eukaryotic cells system of internal membranes are more complex because they have one or more ellipsoidal organelles, mitochondria and chloroplast(in plants). The hereditary information of eukaryotic cells are enclosed and located in the nucleus, while the DNA of prokaryotic cells don’t have special compartment to hold such information. 2.4 Distinguish between the haploid and diploid states. What types of cells are haploid? What types of cells are diploid? The difference between haploid and diploid is the diploid state has two copies of each chromosome, while the haploid state only has one. The types of cells that are haploid are sex cells, everything else are considered to be diploid cells. 2.5 Compare the sizes and structures of prokaryotic and eukaryotic chromosomes. The size of prokaryotic chromosomes is much smaller than eukaryotic. Prokaryotic chromosomes can only be seen using an electron microscope and their size is about 1µm, while eukaryotic chromosomes can be seen using a light microscope and their size is about 10µm. The structures for each are also different. Prokaryotic chromosome have a circular, rod shape structure, while eukaryotic chromosomes are linear and have a centromere that helps move the chromosome during division. 2.9 Match the stages of mitosis with …… 1. Anaphase: f) The chromosome move to the poles of the membrane. 2. Metaphase: b) The nuclear membrane disappears, e) the chromosome move to the equator of the membrane, and i) the attachment of the microtubules to the kinetochore take place. 3. Prophase: c) Condensation of the duplicate chromosomes and d) the formation of the mitotic spindle occurs. 4. Telophase: a) Reformation of new nuclear membrane and g) decondensation of the
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This note was uploaded on 10/23/2010 for the course BIOL 2308 taught by Professor Boxer during the Spring '10 term at University of Houston - Downtown.

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1042171585071 - Peter Obi Homework assignment #1: A total...

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