w w w e tr .X m eP e ap .c rs om June 2003 GCE A AND AS LEVEL MARK SCHEME MAXIMUM MARK: 40 SYLLABUS/COMPONENT: 9700/01 BIOLOGY Paper 1 (Multiple Choice) Page 1 Mark Scheme A/AS LEVEL EXAMINATIONS – JUNE 2003 Syllabus 9700 Paper 1 Question Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Key D A C C A C D A B A B C B C D A D A C C Question Number 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Key D B B A C C B B C D A C C D B B D B B C
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Biology Notes: Threats to biodiversity in MA 1. Climate change: temp‚ sea levels‚ precipitation 2. Non climate threats such as habitat loss‚ habitat fragmentation‚ and invasive species and air and water pollution Fragmentation: often due to man (dams‚ roads‚ and general development) Elements of biodiversity: Species‚ ecosystems & landscapes Mammals from bats to bears Bats got the white nose fungus which caused the bats to die and the insect population flourished because the bats main job
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succinate to fumarate‚ thus loses hydrogen ions and electrons for use in generating ATP. It is important to know what inhibitors affect the activity of this enzyme which eventually will affect the whole process of cellular respiration. In this experiment‚ 1M Malonate( CH2(COO)22-) and 0.1M of Sodium Fluoride (NaF) ‚were employed as inhibitors to the enzyme succinate dehydrogenase to assess their effect on cellular respiration. Malonate is a molecule that inhibits the oxidization of succinate. Besides
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BIOLOGY Biology is the study of life -- life in all of its grandeur. From the very small algae to the very large elephant‚ life has a certain wonder about it. With that in mind‚ how do we know if something is living? Is a virus alive or dead? What are the characteristics of life? These are all very important questions with equally important answers. Characteristics of Life Living tings include both the visible worlds of animals and plants as well as the invisible world of bacteria and viruses.On
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Step 1 A. EasyBeds is a hotel chain operating in Europe and recently expanded into the Asian market. The last two years it operates a small- capacity hotel in Shanghai. The strategy of the business is to provide customers with int’l service standards but at a significantly low cost base. As a result‚ their competitors are 5* hotels‚ but the level of their prices are just above 2 to 3* hotels. To manage that they offer their clients only basic services. In addition‚ their client mix includes both
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1 The Constitution of 2 Liga Filipina The Constitution of Liga Filipina Article I: Name of Organization - Liga Filipina The name Liga Filipina derives its name from the revolutionary group La Liga Filipina‚ led by Jose Rizal against Spain. It is the Filipino Cultural Organization of the State University of New York at Albany. Article II: Purpose A. To promote unity among Filipino students and those interested in Filipino culture
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This essay assesses property dualism‚ a theory of mind. It proclaims the existence of a single‚ physical substance (unlike Cartesian dualism)‚ but argues that this single substance has two potential properties: physical and mental states that are not reducible. The idea that mental states are non-reducible properties of brain states is the central tenant of a theory of mind called property dualism. However‚ before we can assess the theory we must be aware that the question assumes the existence
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biology FOLIO BIOLOGY POLLUTION NIK ‘AINAA SYAKIRAH BT NIK GHAZALI 5 IBNU SINA INTRODUCTION Pollution is the introduction of contaminants into a natural environment that causes instability‚ disorder‚ harm or discomfort to theecosystem i.e. physical systems or living organisms. It can also be define as any undesirable changes in physical‚ chemical or biological characteristics of the natural environment‚ brought about when harmful substances or energy released by human activities. Pollution
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Experiment : 1 Tittle : Preparation of bis(acetylacetonato)copper(II) complex Objective : To synthesis the bis(acetylacetonato)copper(II) complex Introduction : A complex ion is usually form with high charge density metal ion as a central and formation of coordinate covalent bond (dative bond) with high electron molecules or ions. These molecules or ions are functioning as ligands (electrophile in organic compounds). They are easily attracted by electrophile (electron deficiency
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Section 1 : Identifying the Genetic Material Griffith’s Experiments In 1928‚ Frederick Griffith‚ a bacteriologist‚ was trying to prepare a vaccine against pneumonia. A vaccine is a substance that is prepared from killed or weakened disease-causing agents‚ including certain bacteria. The vaccine is introduced into the body to protect the body against future infections by the disease-causing agent. Griffith discovered that harmless bacteria could turn virulent when mixed with bacteria that cause
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