Chapter 10 Cell Growth Division Answer Key Test B

Chapter 10 Cell Growth Division Answer Key Test B Chapter 10 Cell Growth Division Answer Key Test B I Multiple Choice 1 point each 1 The process of cell division that produces two daughter cells each identical to the parent cell is called a Mitosis b Meiosis c Binary fission d Budding Answer a Mitosis 2 Which of the following is NOT a phase of the cell cycle a Interphase b Prophase c Anaphase d Photosynthesis Answer d Photosynthesis 3 During which phase of mitosis do the chromosomes line up at the center of the cell a Prophase b Metaphase c Anaphase d Telophase Answer b Metaphase 4 The structure that holds sister chromatids together is called the a Centriole b Spindle fiber c Centromere d Kinetochore Answer c Centromere 5 Which of the following is NOT a function of the spindle fibers during mitosis a Attaching to chromosomes b Separating sister chromatids 2 c Moving chromosomes to the poles d Providing energy for the cell cycle Answer d Providing energy for the cell cycle 6 What is the main difference between mitosis and meiosis a Mitosis produces two daughter cells while meiosis produces four b Mitosis produces genetically identical daughter cells while meiosis produces genetically diverse daughter cells c Mitosis is used for growth and repair while meiosis is used for sexual reproduction d All of the above Answer d All of the above 7 Which of the following is a type of asexual reproduction a Fertilization b Fragmentation c Pollination d Crossing over Answer b Fragmentation 8 What is the role of checkpoints in the cell cycle a To ensure that the cell is ready to proceed to the next phase b To regulate the speed of the cell cycle c To repair damaged DNA d All of the above Answer d All of the above 9 Uncontrolled cell division can lead to a Cancer b Aging c Immune deficiency d All of the above Answer a Cancer 10 Which of the following is NOT a factor that can influence the rate of cell division a Hormones b Temperature c Oxygen levels d Sunlight intensity Answer d Sunlight intensity 3 II TrueFalse 1 point each 1 The cell cycle is a continuous process with no distinct phases Answer False The cell cycle is divided into distinct phases 2 DNA replication occurs during the G1 phase of interphase Answer False DNA replication occurs during the S phase of interphase 3 Cytokinesis is the division of the cytoplasm Answer True 4 Meiosis produces four genetically identical daughter cells Answer False Meiosis produces four genetically diverse daughter cells 5 Cancer cells are characterized by uncontrolled cell division Answer True III Short Answer 2 points each 1 Describe the four phases of mitosis Answer Prophase Chromosomes condense nuclear envelope breaks down spindle fibers form Metaphase Chromosomes line up at the equator of the cell attached to spindle fibers Anaphase Sister chromatids separate and move to opposite poles of the cell Telophase Chromosomes decondense nuclear envelope reforms cytokinesis begins 2 What are the three main checkpoints in the cell cycle and what do they check for Answer G1 checkpoint Checks for cell size nutrient availability and DNA damage G2 checkpoint Checks for DNA replication completeness and damage M checkpoint Checks for proper chromosome attachment to spindle fibers 3 Explain how crossing over contributes to genetic diversity in offspring Answer Crossing over is the exchange of genetic material between homologous chromosomes during prophase I of meiosis This exchange shuffles alleles creating new combinations of genes that were not present in the parent cells This leads to genetic diversity in offspring 4 Why is cell division essential for living organisms Answer Cell division is essential for growth repair and reproduction in living organisms It 4 allows organisms to replace damaged cells increase in size and create new individuals 5 What are some potential causes of cancer Answer Mutations in genes that regulate cell growth and division Exposure to carcinogens cancercausing substances Viruses that can cause cancer Lifestyle factors such as smoking alcohol consumption and lack of physical activity IV Diagram 5 points Draw and label a diagram of a cell undergoing mitosis Include the following structures Chromosomes Centrioles Spindle fibers Nuclear envelope Cytoplasm Answer Here you would include a handdrawn or digitally created diagram of a cell in mitosis properly labeled Note This is a basic outline for a 1000word chapter with answer keys You can expand upon this structure by adding more detailed information examples and diagrams