w w w e tr .X m eP UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS GCE Advanced Subsidiary Level and GCE Advanced Level e ap .c rs om MARK SCHEME for the June 2004 question papers 9700 BIOLOGY 9700/01 9700/02 9700/03 9700/04 9700/05 9700/06 Paper 1 (Multiple Choice)‚ maximum raw mark 40 Paper 2 (Theory 1)‚ maximum raw mark 60 Paper 3 (Practical 1)‚ maximum raw mark 25 Paper 4 (Theory 2 (A2 Core))‚ maximum raw mark 60 Paper 5 (Practical 2 (A2))‚ maximum raw mark 30 Paper 6 (Options
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Biology 1010 ANATOMY STUDY GUIDE Ionic bond: A chemical bond resulting from the attraction of oppositely charged ions. Covalent bond: A strong chemical bond in which to atoms share electrons. Cell components (explain their functions): Classification scheme of living organisms: Enzymes (explain functions) : Diffusion: Osmosis: Active Transport: Steps of cellular respiration: How does the body grow and maintain itself? The body is made up of tiny cells - for example
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& Dickey‚ 2010). Meiosis is the splitting up of germ cells‚ with each possessing half the number of & Dickey‚ 2010). Meiosis is sexual and has 2 nuclear and cytoplasmic divisions. However‚ one must remember they both are preceded by Interphase. Meiosis produces haploid‚ diploid‚ and gametes cells. The gamete cells are known as sex cells that occur in the reproductive organs‚ and meiosis has sex cells whereas mitosis does not (Simon‚ Reece‚ & Dickey‚ 2010). The diploid cells split
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differ in any way. Genome is the entirety of an organism’s hereditary information. ii) Prophase In prophase‚ the nuclear envelope breaks down and spindles form at opposite "poles" of the cell. Many consider prophase (versus interphase) to be the first true step of the mitotic process. What are the changes that occur in a cell during prophase? Chromatin fibers become coiled into chromosomes with each chromosome having two chromatids joined at a centromere. In the cytoplasm
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Chapter 1 Section 1 Anatomy-Study of internal and external structures of the body and the physical relationships among body parts Gross Anatomy -involves the examination of relatively large structures and features usually visible with the unaided eye Microscopic Anatomy-deals with structures that cannot be seen without magnification Physiology-the study of function and considers the functions of the human body Anatomy and physiology are closely interrelated Theroretically Practically Anatomical
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Botany Exercise 1 – Microscopy A. The Compound Microscope microscope – optical instrument consisting of a system of specially ground lenses that gives sharp‚ distinct‚ and highly magnified images of minute objects. compound microscope will be used. o two lenses: eyepiece + objective lenses o inverted image base coarse adjustment knob fine adjustment knob revolving nosepiece objective lenses stage stage clips stage opening condenser iris diaphragm mirror U-shaped platform that supports
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those produced by mitosis. 2. Also‚ a phenomenon called crossing over occurs during prophase I of meiosis I when pieces of nonsister chromatids exchange places to promote new genetic combinations in the offspring. 3. Prior to meiosis I‚ during interphase‚ the DNA replicates and the cell readies itself for cell division. 4. Meiosis I consists of four stages: prophase I
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diploid cell in your model will have two pairs of homologous chromosomes. In order to keep track of the pairs‚ you will make one pair longer than the other. The beads will represent genes. Use the large sheet of paper to represent the cell. Part A: Interphase Just before meiosis begins‚ the chromosomes are replicated. 1. Use ten beads and a centromere of one color to construct the long chromosome. Use ten beads and a centromere of a second color to construct the second chromosome in the long pair.
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interactions it was realised that cells must complete a certain cell cycle before it can carry out another. The most interesting realization is that M phase and G2 fusion caused G2 to enter mitosis. When unfertilised Xenopus oocytes were injected into interphase oocytes there were similar results obtained. This meant that in the cytoplasm of dividing cells a factor controlled entry to mitosis and the activity was called the M-phase controlling factor. 4. The G1/S control point is determined by three
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LAB REPORT 4 Isolation of genomic DNA from animal tissues Introduction A rapid expansion of DNA analysis in medical‚ biotechnological and basic research has created the need for simple and efficient commercial methods for isolating genomic DNA. Many different methods and technologies are available for the isolation of genomic DNA. In general‚ all methods involve disruption and lysis of the starting material followed by the removal of proteins and other contaminants and finally recovery
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