Emily East November 22‚ 2014 AP Biology: 4th Hour Mitosis & Meiosis Test Corrections 3.) At which phase are centrioles beginning to move apart in animal cells? E. Prophase This answer can be found in the book on page 232‚ “Prophase – centrosomes move away from each other‚ propelled partly by the lengthening microtubules between them.” 4.) If cells in the process of dividing are subjected to colchicine‚ a drug that interferes with the formation of the mitotic spindle apparatus‚ at which stage will
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Chapter 6 Explain what free energy is and how it can be used to predict the energetic outcome of chemical reactions.Free energy is defined as the energy available to do work in any system. The free energy is denoted by the symbol G. G = H – TS* H: the energy contained in a molecule’s chemical bonds‚ called enthalpy.* TS: the energy term related to the degree of disorder in the system. T is the absolute temperature (K)‚ and S is the entropy.We can use the change in free energy to predict whether
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1. Paracrine signaling A) involves secreting cells acting on nearby target cells by discharging a local regulator into the extracellular fluid. B) requires nerve cells to release a neurotransmitter into the synapse. C) occurs only in paracrine yeast cells. D) has been found in plants but not animals. E) involves mating factors attaching to target cells and causing production of new paracrine cells. 2. Which of the following is true of synaptic signaling and hormonal signaling? A)
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organism’s inherited traits. Cell Cycle: Interphase (G1‚ S‚ G2) and Mitotic (M) phase (mitosis and cytokinesis). Cell spends most of their time in the G1 phase DNA is replicated during the S phase Cells divide in the Mitotic phase‚ as well as the seperation of sister chromosomes. Mitosis: review diagrams in textbook‚ genetically identical daughter cells (development‚ growth‚ asexual reproduction) G2: two chromosomes form from replication from a single centrosome (animal cells have two centrioles on
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Act Together Cell Theory Cells are the basic structural and functional units of life. In multicellular organisms different cells perform different functions. Different types of cells work together so that the organism functions as a co-ordinated whole Unicellular and Multicellular Organisms A multicellular organism is made up of many cells A unicellular organism only has one cell Plant Cell Animal Cell Basic Requirements Needed By Cells Cells have 3 basic
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Mitosis & Meiosis/ Human Development The Cell Cycle Stages of the Cell Cycle: G1 – cell growth S – DNA replication and continued cell growth G2 – Final preparations for division and continued cell growth M – Mitosis or cellular replication Some Important Terms for Replication: Chromosome – rod-shaped body in the nucleus that is only visible during replication that contains DNA and is our hereditary unit. Nucleolus – organelle inside the nucleus composed of RNA for ribosome formation.
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contemporary biological issue Introduction Stem cells are undifferentiated cells able to differentiate into specialized cell types. These are used for stem cell treatment‚ which is an intervention strategy that introduces new adult stem cells into damaged tissue in order to treat disease or injury. For over 30 years‚ bone marrow and‚ more recently‚ umbilical cord blood stem cells have been used to treat cancer patients with leukaemia and lymphoma because during chemotherapy most growing cells are killed‚ but a donor’s
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Topic 2: Cells 2.1.1 Outline the cell theory Outline: To give a brief account or summary All living things are made of cells Cells are the smallest unit of life Cells come from pre-existing cells 2.1.2 Discuss the evidence for the cell theory Discuss: Give an account including‚ where possible‚ a range of arguments for and against the relative importance of various factors‚ or comparisons of alternative hypotheses. 1: All living things are made of cells When living things are observed
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Ascaris contained two chromosomes while somatic cells contained four. B. Fertilization 1. van Beneden proposed in 1887 that an egg and sperm could fuse to form a zygote. 2. The fusion of gametes is called fertilization or syngamy. C. Meiosis 1. A reduction division is required to reduce the number of chromosomes to half so sexual reproduction can occur. 2. This reduction division is known as meiosis. D. The Sexual Life Cycle 1. Adult cells are diploid‚ and gametes are haploid. 2. Sexual
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eukaryotic organelles. ”A eukaryotic cell is sectioned by internal membranes into different functioning categories called organelles. For example‚ the nucleus houses DNA‚ the genetic component that controls the cells activities. (Boundless. “Introduction” Boundless Biology). The Cytoplasm is the material between the cell membrane and the nucleus. It has a lot of responsibilities within the cell. It contains enzymes for breaking down waste and also gives the cell its shape. The Nucleus or the brain
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