UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level CHAPTERS CLASSIFIED:ENZYMES 9700/2 BIOLOGY Paper 2 Structured Question AS For year 2014 Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams‚ graphs or rough
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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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Discuss evolutionary explanations of the functions of sleep. Evolutionary explanation of sleep suggests there four mains reasons for it‚ energy conservation‚ foraging requirements‚ predator avoidance and to waste time. The evolutionary approach has also been called the ecological approach. It is called ‘ecological’ because it is based on observations of animals in their natural environment. Energy conservation is the theory that warm blooded animals need to expend a lot of energy to maintain a
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Biology Honors Final Exam Review Study Guide A. Intro Unit * Characteristics of life (DR.CHARGE) * DNA * Directs protein synthesis * Reproduce * Divides in mitosis (asexual reproduction) * Cells * Homeostasis * The process by which cells maintain constant internal condition (water‚ temperature) * Adaptation (Evolution) * Respond to stimulus * Growth (Development) * Energy * Heterotroph: an organism that cannot synthesize its own food
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number of neutrons‚ used in biological research (radioactive) 6. Describe the 4 main types of bonds. Put them in order from strongest to weakest. Covalent-electrons are shared between the atoms‚ can be polar or nonpolar depending on the difference in electronegativity Ionic- one atom takes an e- from another‚ form anions and cations Hydrogen- between H and O‚ N or F‚ because electronegativity and unpaired e- Vanderwaals- between all molecules‚ movement of e- causing slight change in polarity
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The relationship between journalism and public relations has been described as tumultuous. Hitchcock (2012) says there is a shifting dynamic between the two and has found that journalists are starting to become more and more reliant on public relations ‘(PR)’‚ while Jackson (2009) says that up to 80% of media content has come from a public relations source. In this instance‚ Evans (2010) says‚ “it is time to admit that the two disciplines of journalism and PR are two sides of the same coin and that
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Evolutionary approach to food preference – perfect essay Evolution is the change in inherited characteristics of biological populations over successive generations. The environment our early ancestors lived in must be understood to understand why they adapted to certain behaviours or characteristics. This environment is known as EEA (environment of evolutionary adaption). Natural history and science have found that our species has spent much of its life as hunter-gatherers so by looking at their
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Charles Darwin: Pioneer of Evolution Theory Charles Darwin is the source of one of the biggest controversial subjects in the modern world. A pioneer of evolutionary biology‚ Darwin’s ideas and observations are all the more important in today’s further understanding of the sciences. Darwin’s work and understanding has propelled him to become one of the most influential scientists that ever lived. The Grandfather of Charles‚ Erasmus Darwin‚ was a physician and poet with a fascination for natural
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(the first step in the electron transport chain) (“Succinate Dehydrogenase‚” 2012). Reference Morgan‚ Judith Giles and Carter‚ M. Eloise Brown. Investigating Biology (Laboratory Manual). 7th ed. 107- 121. 2011. Reece‚ Jane B.‚ Urry‚ Lisa A.‚ Cain‚ Michael L.‚ Wasserman‚ Steven A.‚ Minorsky‚ Peter V.‚ and Jackson‚ Robert B. Campbell Biology. 9th ed. 152-171. 2011. Malonate inhibition of oxidation in the Krebs Tricarboxylic acid cycle. (Received for publication‚ October 26‚ 1948)‚ from http://www
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January 31‚ 2014 Mr. Robinson IB Biology I 2ND Period The Effects of Light on Plant Growth Introduction: Photosynthesis is the process in which plants use light energy‚ water‚ and carbon dioxide to produce food. Plants use the food they make for the growth and for the carrying out other life processes. Sunlight is the natural energy source for photosynthesis. White light form the sun is a mixture of all the colors of the light spectrum: red‚ orange‚ yellow‚ green‚ blue‚ and violet. Light
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