Pre-AP Biology Chapter 2 Test Chemistry of Life Multiple Choice (1 point each) Identify the choice that best completes the statement or answers the question. ____b 1. The space surrounding the nucleus of an atom contains |a. |protons. |c. |neutrons. | |b. |electrons. |d. |ions. | ____c
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The Endomembrane System A system of interconnected membranes (also known as the cytomembrane system) that fills the cell interior and connects the cell boundary with the double membraned organelles - nucleus, plastids and mitochondria. The phospholipid bilayer forms the basis for both outer and internal membranes. Thus while the Plasma Membrane, the outer-most cell membrane is an integral component of the cell boundary, its numerous convoluted protrusions into the cell interior and its connectivity
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BIOLOGY I TUTORIAL 2 BASIC MOLECULES OF CELLS II (Source: Final examination, Dec 2012) Q1. (a) Amino acids are the building blocks of proteins. Figure 1.1 shows the dipeptide molecule. [pic] Figure 1.1 i) Briefly explain the formation of dipeptide from two amino acids. (3 marks) ii) Name the molecular unit that could determine the structure of a protein. (1 mark) (Source: Final examination
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the sun directly into electricity. Plant cells contains chloroplasts and absorbs light energy from the Sun. Plant growth and development are driven by continuous generation of new cells. (Inze, D. &DeVeylder, L. The plant cycle Annu.Rev Plant Biology, 54 235-236, 2006). There are several similarities in both cells. ATP in common in both plant cells and solar cells. ATP synthase is a ubiquitous membrane enzyme that plays a key role in biological energy metabolism. This enzyme interconverts two
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Cellular and Molecular Biology Question 1. i. How have Eukaryotic cells solved the problem of moving proteins and organelles from one part of the cell to another, faster than would occur by diffusion? And give a specific example to illustrate how a protein may be moved from part of the cell to another. The huge volume inside a eukaryotic cell is compartmentalized into a large number of bacterium-sized parts. Because eukaryotic cells are subdivided, the molecules required for specific chemical
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AQA GCSE Biology – Unit 2 summary notes AQA GCSE Biology Summary Notes For Unit B2 Exam Tuesday th May 13 2014 Page 1 AQA GCSE Biology – Unit 2 summary notes B2.1 Cells and Cell Structures Summary All living things are made up of cells. The structures of different types of cells are related to their functions. To get into or out of cells, dissolved substances have to cross the cell membranes. Cells Cells are the smallest unit of life. All living things are made of cells. Most human cells
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ULTRAVIOLET/VISIBLE SPECTROSCOPY PURDUE UNIVERSITY INSTRUMENT VAN PROJECT ANALYSIS OF PLANT PIGMENTS USING PAPER CHROMATOGRAPHY AND VISIBLE AND/OR UV SPECTROSCOPY (1-31-96) INTRODUCTION We have seen that all cells must constantly consume fuel molecules to maintain themselves, grow, and reproduce. Fuel molecules such as glucose constitute an immediate source of energy for biological work that can be released by catabolic cell processes. However it is necessary that life on earth have a constant source
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Analyse the importance of Urey and Miller’s experiments in illustrating the nature and practise of biology There are three specific requirements for life to form: a source of energy, carbon and water. In the 1950’s, Harold Urey and his student Stanley Miller formed an experiment to test if inorganic substances could produce organic substances to find out if living things could come from non-living things. The experiment was formed to explore Haldane and Oparin’s theory. Urey and Miller’s experiment
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Life Processes of Living Things 1. Nutrition: the obtaining and processing of food materials. a. Ingestion: taking in food b. Egestion – removal of undigested food c. Digestion – breakdown of food d. Photosynthesis 2. Transport: the intake and distribution of materials throughout an organism. 3. Respiration: the release of energy from food by oxidation a. Breathing 4. Excretion: the removal of metabolic wastes from an organism. 5. Synthesis: the combining
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS GCE Ordinary Level MARK SCHEME for the May/June 2008 question paper 5090 BIOLOGY 5090/02 Paper 2 (Theory), maximum raw mark 80 • CIE will not enter into discussions or correspondence in connection with these mark schemes. ww w. Ta CIE is publishing the mark schemes for the May/June 2008 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses. lee
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