associated with living things are grouped into 4 major categories carbohydrates lipids (fats) proteins nucleic acids 1. Carbohydrates • it’s a biological macromolecule that consists of carbon‚ hydrogen & oxygen in a 1:2:1 ratio • are among the most common organic material on earth • millions of tonnes are produced by plants and algae every year through the process of photosynthesis • are used by organisms as a source of energy‚
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att t e s ie A few words on the history and future of surface chemistry For more than 400 years‚ important scientists and mathematicians like Leonardo da Vinci‚ Isaac Newton‚ Pierre Simon Laplace‚ Thomas Young‚ Siméon Denis Poisson‚ Josiah Willard Gibbs‚ Frederick M. Fowkes have done valuable pioneer work for the explanation of surface tension‚ capillarity‚ wetting and other interfacial problems. As a sector of physical chemistry‚ surface chemistry in connection with colloid chemistry established
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CARIBBEAN EXAMINATIONS COUNCIL Car ib b e an Se con d ar y Ed ucat ion Ce r t if icat e ® CSEC® BIOLOGY SYLLABUS a) Effective for examinations from May–June 2015 NCH 2.SYLLABUS CXC 20/G/SYLL 13 Published by the Caribbean Examinations Council All rights reserved. No part of this publication may be reproduced‚ stored in a retrieval system‚ or transmitted in any form‚ or by any means electronic‚ photocopying‚ recording or otherwise without prior permission of the author or
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discovered that many proteins take the shape of an alpha helix‚ spiraled like a spring coil. In 1950‚ Erwin Chargaff found that the arrangement of nitrogen bases in DNA varied widely‚ but the amount of certain bases always occurred in a one-to-one ratio. In the early 1950s‚ there was a race to discover DNA among scientists. At Cambridge University‚ Francis Crick along with James Watson showed a great interest and were impressed by Pauling ’s work. Meanwhile in London‚ Maurice Wilkins and Rosalind
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Part A After-TAX Cost Debt O’Grandy Apparel Company can calculate the after tax debt cost using YTM (CP + (FV-Nd /n) / FV +Nd /2) *2. Cp is (0.12/2) * 1000= 60 Semi-annually Fv is 1000 Nd is 995 – (0.025* 1000) = 970 N is 20*2 because it is semi-annually then you have to use Kdt= Kd+ (i-T) .The tax bracket is 40 percent. Now we can have the after tax debt when it is equal or smaller than $700000 Kd ( 1-T) = 0.1249 (1-0.4)= 0.07494. If it is more than $700000 it will be KD (1-t) = 0.18(1-0.4)
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Bio 93 Review Sheet: 1. Understand all the THEMES presented in the introductory lecture (lec 1). 2. What is an open system? Energy in and out‚ comes in and leaves as heat 3. What are the 4 most important elements in the human body? C‚ O‚ N‚ H 4. Draw the periodic square for Helium. How many valence electrons does it have? How do you figure this out using the periodic table? Two valence e-‚ 23He‚ all the way right full shell only holds two electrons 5. What is an isotope? How are they used
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M10/4/BIOLO/SPM/ENG/TZ2/XX+ 22106016 Biology Standard level Paper 1 Monday 17 May 2010 (afternoon) 45 minutes INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. 2210-6016 15 pages © International Baccalaureate Organization 2010 –2– M10/4/BIOLO/SPM/ENG/TZ2/XX+ 1. What does a small standard deviation
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Extended experimental investigation: effects on membranes of environmental stress Background It is not possible to observe membranes directly‚ so this investigation is an indirect study of the effects of different substances and treatments on living beetroot cells. Beetroot cells have been chosen for this activity because each beetroot cell has a large central vacuole bounded by a membrane (Figure 1). Contained in the vacuole is the red pigment anthocyanin‚ which gives the beetroot its
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from many drug stores because it was once the standard test for sugar in the urine of diabetics. Some of the solution to be tested (this could be the juice or extract of the fruit or vegetable in question) is mixed with Benedict’s test reagent (by volume‚ usually about 4 solution to 1 reagent) and heated almost to boiling. A color change from the blue of the reagent to almost any other color -- green‚ yellow‚ orange‚ red‚ brown -- is an indication of the
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DOCUMENT CHECKLIST Certified copies of : o o o o o o Identity Card SPM/ UEC/ O-Level results STPM/UEC/A-Level/ Matriculation/ Diploma or equivalent Full Academic Transcripts (if applicable) Letter of Completion/ Certificate or Scroll Subjects synopsis for credit exemption (if applicable) What you need to BRING during Registration: (please ignore this if it has been submited or done earlier) Letter of Offer from IUKL 4 passport – sized colour photographs (blue background) Original
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