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Mitosis

AP biology test bank chp 12

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Biology
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Cell biology
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Cell cycle
Mitosis
Cyclin
Kinetochore
Metaphase
Cell division
Spindle apparatus
Prometaphase
Cell growth
Anaphase

Campbell's Biology, 9e (Reece et al.) Chapter 12 The Cell Cycle In this chapter, 24 questions are new, and 12 have been altered to incorporate new material from the textbook. As in the other chapters, any questions that depend on figures or introductory scenarios have been placed at the end of the chapter rather than in concept sequence. Multiple-Choice Questions 1) The centromere is a region in which A) chromatids remain attached to one another until anaphase. B) metaphase chromosomes become aligned at the metaphase plate. C) chromosomes are grouped during telophase. D) the nucleus is located prior to mitosis. E) new spindle microtubules form at either end. Answer: A Topic: Concept 12.1 Skill: Knowledge/Comprehension

AP Bio_Meiosis

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Cell biology
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Cell cycle
Mitosis
Molecular genetics
Meiosis
Chromatid
Anaphase
Prophase
Homologous chromosome
Cohesin
Cell division

Concept 13.3: Meiosis reduces the number of chromosome sets from diploid to haploid * Like mitosis, meiosis is preceded by the replication of chromosomes * Meiosis takes place in two consecutive cell divisions, called meiosis I and meiosis II * The two cell divisions result in four daughter cells, rather than the two daughter cells in mitosis * Each daughter cell has only half as many chromosomes as the parent cell The Stages of Meiosis * Chromosomes duplicate before meiosis * The resulting sister chromatids are closely associated along their lengths * This is called sister chromatid cohesion * The chromatids are sorted into four haploid daughter cells * Division in meiosis I occurs in four phases: Prophase I

Ch 12 Study Guide

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Cell biology
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Cell cycle
Mitosis
Kinetochore
Cell division
Spindle apparatus
Meiosis
Prometaphase
Metaphase
Cytokinesis
Cleavage furrow

Copyright ? 2011 Pearson Education, Inc. - 1 - Name_______________________Period___________ Chapter 12: The Cell Cycle Overview: 1. What are the three key roles of cell division? State each role, and give an example. Key Role Example Reproduction An amoeba, a single-celled eukaryote, divides into two cells. Each new cell will be an individual organism. Growth and development A sand dollar embryo forms two cells shortly after the fertilized egg is divided. Tissue removal Dividing bone marrow cells will give rise to new blood cells. 2. What is meant by the cell cycle? The cell cycle is the life of a cell from the time it is first formed from a dividing parent cell until its own division into two daughter cells.

Chapter 12 Notes

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mitosis

Biology 240 SI Session #10 Chapter 12 SI Leader: Lauren Curtis Email: [email protected] Prokaryotes: Describe the process of 'binary fission' : Binary fission is the process by which a prokaryotic cell cell reproduces asexually by dividing in half. This does not include mitosis in prokaryotes, but a process all in it's own. The cell duplicates it's DNA, doubling in size, and then splits into two daughter cells. Here are some terms you need to be familiar with in regards to cell division... Chromatin: A DNA-protein complex, represents DNA in it's unfolded and non condensed form. Chromosomes: Represents DNA folded and condensed down as the cell gets ready to divide. It organizes the DNA in a way where parts won't get lost when the cell splits in half.

AP Biology Campbell 8th edition Chapter 12 Study Guide

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The Cell Cycle

STUDY GUIDE: CH. 12 THE CELL CYCLE THE KEY ROLES OF CELL DIVISION 1. Explain how cell division functions in reproduction, growth, and repair. -Single-celled and other organisms reproduce asexually by cell division -Asexual spores, binary fissiion in bact., growth, breakage, and estab. Of vines -Growth may increase the sizes or numbers of cells -Wounding releases growth factors that stimulate mitosis 2. Describe the structural organization of the genome. -Organisms may have hundreds to tens of thousands of genes -Genes, controlling sequences, spacers, and junk are strung on chromosomes -Chromosome numbers -Bacteria may have one or a few circular or linear chromosomes -Eukaryotes may have one to >1000 linear chromosomes

How do cells divide?

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cell
How do cells divide? There are two types of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells. Mitosis is a fundamental process for life. During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells. Because this process is so critical, the steps of mitosis are carefully controlled by a number of genes. When mitosis is not regulated correctly, health problems such as cancer can result.

Learning Express AP Biology Exam 2

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Nutrition
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Organelles
Glucose
Starch
Blood sugar
Mitosis
Cell
Eukaryote
Phosphorylation

1. Semiconservative replication of DNA refers to the fact that A. the daughter DNA is an entirely new duplex and thus the original DNA is intact. B. pieces of the old and new DNA duplexes are jumbled together in the daughter generation. C. each strand of the parent DNA serves as a template for the synthesis of its new partner strand. Thus, one strand is conserved in each new double helix. D. DNA replication is modest in its ATP requirements. E. DNA replication occurs by base pairing between adenine and thymine and between guanine and cytosine. 2. The following statements about the codon are true EXCEPT A. the codon is a triplet of nucleotides on messenger RNA (mRNA). B. the codon is a triplet of bases on transfer RNA (tRNA).
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