8.1.1 The Eukaryotic cell cycle 1. If a cell is in a state in which it no longer divides then the cell is probably arrested at which stage of the cell cycle? A) G1 2. Interphase of the cell cycle lasts longer than mitosis? A) TRUE - A cell spends about 90% of its life in interphase of the cell cycle‚ while it spends only about 10% of its life in M phase. 3. When does DNA replication occur in the cell cycle? A) Interphase 4. Which statement about the cell cycle is incorrect? C) In G2
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Exercise 13 MITOSIS: REPLICATION OF EUKARYOTIC CELLS ANSWERS TO QUESTIONS 1. a. Mitosis and cytokinesis are often referred to collectively as "cellular division." Why are they more accurately called cellular replication? The result of mitosis is production of two cells (replicates) identical to the parent cell. The genetic material is replicated rather than divided. b. Does the cell cycle have a beginning and an end? The organization of our study of cellular events indicates a beginning and
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Compare and contrast two main areas of Psychology The two key areas of psychology this essay will compare and contrast are Developmental Psychology and Cognitive Psychology. The definition of ‘compare’ is to examine in order to observe resemblances or differences. The role of Cognitive Psychologists involves an investigational approach to understanding people’s mental processes for example‚ perception‚ attention‚ memory‚ language and how people think and learn. In similarity the role of
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1a. What are the two major parts of the cell? The two major parts of the cell are the nucleus and the cytoplasm. 1b. How is the role of the nucleus in a cell similar to the role of the captain on a sports team? The role of the nucleus in a cell similar to the role of the captain on a sports team because nucleus is the middle part of an object or group‚ forming the basis for its activity and growth. 2a. What is the function of lysosomes? The function of lysosomes is cellular organelles that contain
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Gene expression is the ability of a gene to produce a biologically active protein. This process is regulated by the cells of an organism‚ it is very important to the survival of organisms at all levels. This is much more complex in eukaryotes than in prokaryotes. A major difference is the presence in eukaryotes of a nuclear membrane‚ which prevents the simultaneous transcription and translation that occurs in prokaryotes. Initiation of protein transcription is started by RNA polymerase. The activity
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photosynthetic eukaryotes (Biology 108 Lab Manual 2012). During eukaryotic evolution‚ red algae and green algae led to five supergroups of eukaryotes through a process of secondary endosymbiosis (Campbell et al.‚ 2008). Three basic photosynthetic pigments: chlorophylls‚ carotenoids‚ and phycobilins‚ each absorb light at different wavelengths due to different colors and different
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I. Describe the structure and function of the nucleus and mitochondria. The mitochondria is a semi-autonomous organelle which reproduces by bynary fission and has its own DNA. Its main function is to produce the energy intermediate ATP‚ through ATP synthase. Mitochondria could be considered a cell inside a cell. It has its own membranes (inner and outer membranes)‚ its ribosomes (to produce the proteins encoded in its DNA)‚ a matrix -- where aerobic respiration occurs. The invaginations of the inner
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Chapter 18 Regulation of Gene Expression PowerPoint® Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero‚ updated by Erin Barley with contributions from Joan Sharp Copyright © 2008 Pearson Education‚ Inc.‚ publishing as Pearson Benjamin Cummings Overview: Conducting the Genetic Orchestra • Prokaryotes and eukaryotes alter gene expression in response to their changing environment • In multicellular eukaryotes‚ gene expression regulates development
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WINGATE’S RAIDERS: THE NUCLEUS OF A NATIONAL ARMYHITLER AND THE COLLAPSE OF THE WEIMAR REPUBLIC Due Date Student Number WINGATE’S RAIDERS: THE NUCLEUS OF A NATIONAL ARMY Captain Orde Wingate helped to shape the first effective Jewish defense against Arab attacks during the years 1936-1939. When Wingate arrived in Palestine as a British intelligence officer‚ the Jews were meeting these attacks with strictly defensive measures inherited from the Haganah‚ an underground resistance organization
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strategies used by autotrophs and heterotrophs to obtain free energy for cellular processes. In other words‚ how and in what form does each capture and store that energy? 2. Explain how photosynthesis differs in eukaryotic organisms (with organelles such as chloroplasts) and in prokaryotic organisms (single-celled‚ no organelles). 3. How does a metabolic pathway such as photosynthesis suggest common ancestry? 4. Describe the basic structure and function of a chloroplast. 5. Describe the
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