NAME:__________________________________ STUDENT#:______________________________ YORK UNIVERSITY FACULTY OF SCIENCE AND ENGINEERING SC/BIOL 3130N (3.0) – MOLECULAR BIOLOGY II MIDTERM I – January 31st‚ 2012‚ VERSION A INSTRUCTIONS: 1) Please sign the sign-in sheet that will be circulated during the exam. 2) Multiple choice – 12 questions‚ one mark each. Choose the best single mostcorrect answer and fill in all answers on the scantron sheet provided. Questions where more than one answer is selected
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Biology Midterm Outline Topics: * Topic One: Chemistry of Living Things (p2-4) * Topic Two: The Cell (p5-6) * Topic Seven: Evolution (p23-27) * Topic Ten: State Labs (37-40) Topic One: Chemistry of Living Things I. All living things must maintain homeostasis in order to stay alive. A) Homeostasis: A balanced state in an organism’s body. B) Failure to maintain homeostasis results in disease or death. C) Homeostasis is often maintained using feedback mechanisms. 1. Feedback mechanisms
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Introduction Notes What is Science? Study of/tool to understand/body of knowledge/process to understand the natural world What do Scientists do? Make observations Attempt to discern patters Assume the future is like the past What is Biology? The study of life What is Life? Not ever clearly defined Characteristics of living systems: Highly organized Huge energy users 90% of food we eat is used to keep us going Development Development from a single cell to billons of cells Reproduction
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theory states that: i. All organisms are made of organelles / cells. ii. All existing cells are produced by other living / dead cells. iii. The atom / cell is the most basic unit of life. 7. Cell theory is one of the great unifying theories of biology / chemistry. Main idea: Prokaryotic cells lack a nucleus and most internal structures of eukaryotic cells. 8. For each of the following cell characteristics‚ place a check mark in the appropriate box or boxes to indicate whether it is a characteristic
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SPM Biology Form 4 Notes – Nutrition (Part I) Photoautotrophs Type of Nutrition * Nutrition – process by which organisms obtain energy and nutrients from food‚ for growth‚ maintenance and repair of damaged tissues. * Nutrients – the important substances which are required for nourishment of an organisms. * Living organisms are divided into two groups (based on the nutritional habits): autotrophs and heterotrophs. (i) Autotroph * Autotrophs – organisms that are able to synthesise
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CHOLERA Causes: (reference 10) Cholera is a small intestinal infection caused by the digestion of the bacterium Vibrio Cholerae (a comma-shaped bacillus that varies in size from 1-3 µm in length by 0.5-0.8 µm in diameter)‚ present in food or water (raw shellfish‚ uncooked fruits and vegetables‚ and other foods). The disease is most common in places with poor sanitation‚ crowding‚ war‚ and famine. Transmission: (reference 1) When humans ingest cholera bacteria‚ they may not become sick themselves
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Biology Study Guide Which one of the following statements is false? Selected Answer: a. Factors that alter DNA and make cells cancerous are called carcinogens. Which one of the following is false? Selected Answer: b. DNA packing tends to promote gene expression. Silencers are sites in DNA that Selected Answer: c. bind repressor proteins to inhibit the start of transcription. Proteins that bind to DNA and turn on operons by making it easier
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II. BIOLOGY AND BEHAVIOR Objective II.1 Identify the basic components of the neuron. Key Terms neuron dendrites axon cell body (soma) Exercises 1. What is a neuron? Neurons are individual cells in the nervous system that receive‚ integrate‚ and transmit information 2. Label each part of the neuron. 1.Soma 2.Dendrites 3.Myelin sheath 4.Axon [pic] Objective II.2 Define action potential
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(3): 109-16. doi:10.2310/6620.2004.04006. PMID 15724344. Henry George Liddell‚ Robert Scott‚ A Greek English Lexicon‚ on Perseus Digital Library Alberts‚ Bruce; Johnson Alexander; Lewis‚ Julian; Raff‚ Martin; Roberts‚ Keith; Walter‚ Peter. Molecular Biology of the Cell. New York: Garland Science‚ 2002‚ pp. 62‚ 118 – 119.
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Bibliography: IB Study Guides‚ Biology‚ Oxford‚ Andrew Allott Appendix: Attached
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