Biology Revision Notes Biochemical Tests: Proteins - add biurettes reagent to the sample. If protein is present‚ clear colour change from blue to purple. Reducing Sugars – add Benedict’s reagent to the sample. Heat in Bunsen or water bath. If reducing sugars are present‚ clear colour changes from blue -> orange red precipitate. Lipids – dissolve sample in ethanol. Slowly pour the solution into the water slowly. If lipids are present a white emulation forms on the surface. Starch – add iodine
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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 - Main Questions And Answers: Complete the table with a tick if the statement in the first column is true‚ for each process. Write a simple equation to show how ATP is synthesised from ADP: ADP + Pi ATP Give two ways in which the properties of ATP make it a suitable source of energy in biological processes: 1. Energy released in small/suitable amounts 2. Soluble 3. Involves a single/simple reaction Humans synthesise more than their body mass of ATP each day.
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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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Marine biology is more than the scientific study of marine life. Marine biology is the study of marine organisms‚ their behaviors‚ and interactions with the environment. Marine biologists study oceanography and the associated fields of chemical‚ physical‚ and geological oceanography. Marine biologists are also able to specialize in large aquatic animals‚ all the way down to microscopic and minuscule organisms. Anything else in between‚ marine biologists are able to study. Marine biology is known
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and future Earth. It allows us to see beyond our history and where and how we first came to be‚ tracking the little but significant details which allows science to trace our own ancestral journey out of Africa. The National Geographic’s Genographic Project aims to map historical human migration patterns by collecting and analysing DNA samples from hundreds of thousands of people from around the world. Six billion people around the world from every imaginable background with incredible diversity yet
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Echinoderm Echinoderm diversity Scientific classification Kingdom: Animalia Subkingdom: Eumetazoa Superphylum: Deuterostomia Phylum: Echinodermata Klein‚ 1734 Subphyla & Classes Homalozoa † Gill & Caster‚ 1960 Homostelea † Homoiostelea † Stylophora † Ctenocystoidea † Robison & Sprinkle‚ 1969 Crinozoa Crinoidea Paracrinoidea † Regnéll‚ 1945 Cystoidea † von Buch‚ 1846 Asterozoa Ophiuroidea Asteroidea Echinozoa Echinoidea Holothuroidea Ophiocistioidea † Helicoplacoidea †
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Critically discuss the notion that Scientific Management was a ‘good’ idea in the history of management thinking. Since the thousands of years‚ people use the management in the great projects such as the Egyptian pyramids and the Great Wall of China. According to Robbins‚ et al. (2006)‚ Henri Fayol said that all managers perform five functions: planning‚ organizing‚ commanding‚ coordinating and controlling in the early part of the twentieth century. Robbins stated that‚ in the mid-1950s‚ management
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2013‚ Section 3 Prepared By Md Abdulla Al Mamun Fahim ID: 102 0366 030 Mahidur Rahman Khan ID: 102 0625 030 Md Nurul Azim Rifat ID: 101 0847 030 Tahsin Shahab Uddin ID: 101 0692 030 Prepared for Dr. S.M. Mostafa Kamal Khan Department of Biology and Microbiology North South University Date of Submission: 20th August‚ 2013 Sl | Topic | Page | 1 | Introduction | 2 | 2 | Description | | | 2.1 Impact on Air | 3 | | 2.2 Impact on Water | 3 | | 2.3 Impact on Soil Pollution | 5 |
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Scientific farming vs organic farming - Document Transcript 1. Scientific Farming Vs Organic Farming Class: 2A Group 3 Group leader: Wong Kin Kon‚ Tony (40) Group member: Chow Cheuk Yin‚ Tommy (8) Fung Sheung Chi‚ Simon (10) Hui Ying Kit‚ Steven (12) Man Wing Ho‚ Victor (21) 2. Content Introduction P.1 Scientific Farming P.2 Organic Farming P.2 Advantages and Disadvantages of - Scientific farming method P.3 - Organic farming method P.4 Comparison between organic farming and scientific farming
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