LEC words for PER MS and QP 1.2 - XtremePapers- biological washing powder enzymes biology igcse codes ,Explain how enzymes in biological washing powders act to remove food and blood stains from clothes. [4] (d) When blood clots, an enzyme is activated to change a protein from one form into another. Describe the process of blood clotting. [3] [Total: 14] cie-igcse-biology-0610-theory-v2-znotes.pdf - CIE IGCSE ..IE IGCSE BIOLOGY//0610 P AGE 7 OF 35 5.3 Graphs for Changes in Enzyme Activity EFFECT OF TEMPERATURE EFFECT OF PH 5.4 Enzymes and their Uses x Seeds to germinate: the enzymes turn insoluble food stores to soluble. x Biological washing powders: enzymes are added to washing powders to help remove stains for example: o Lipase for …
Biology Notes for IGCSE 2014. 1. Enzymes and reactions. 2. Enzymes - 'Lock and key' model. 3. Role of enzymes in germinating seeds. 4. Use of enzyme in biological washing powders.
GCSE. Biology - (Higher) G. rade. Materials. For this paper you must have: Ruler. Pencil. ... Enzyme technology The diagram shows how the human insulin gene can be used to genetically modify bacteria. (a) (i) Name the enzyme used to join the insulin gene to the plasmid. ... Washing powders can be biological or non-biological.
Rods and cones are light-sensitive cells in the retina. When stimulated they generate electrical impulses, which pass to the brain along the optic nerve. The normal retina has rods that see only black, white, and shades of grey and tones and three forms of color cones, red, green, and blue. More photo of rods and cones.
Mar 06, 2020·Washing powders: 20.5 Genetic Engineering Biological washing powders and liquids contain enzyme Genetic engineering: changing the genetic material of an that help remove stain organism by removing, changing or inserting individual The enzymes are coated with a special wax that melts in genes the wash releasing the enzyme Examples of genetic ...
BIOLOGY 0610/12 Paper 1 Multiple Choice (Core) February/March 2019 ... 10 The diagram shows the effect of an enzyme working in the human digestive system. protein amino acids enzyme at pH 1.5 ... 36 Which enzyme in a biological washing powder will help remove fatty stains? A amylase B lipase C pectinase D protease
Dec 17, 2012·#24 Use of enzyme in biological washing powders Biological washing powders contain protease and lipase to remove protein stains and fat …
modified subtilisin enzyme for use in biological washing powder. The modified enzyme had a different K M and k cat from the wild type protein. Explain the meaning of the terms K M and k cat. Sketch (or create in a spreadsheet or other program, using the Michaelis-Menten equation) a graph of v o against [S] for the wild type and modified enzyme ...
It is washed in a biological washing powder. Which combination of enzymes should be in the washing powder to remove the stain? A amylase and lipase B lipase and protease C pectinase and amylase D protease and pectinase 5. The diagrams show a protease enzyme catalysing the breaking of part of a protein molecule into smaller pieces.
Many stains on clothes are organic molecules – oil from skin, protein from blood, fat and protein from food; Detergents that only contain soap can remove some of these stains when mixed with hot water, but it can take a lot of time and effort and very high temperatures to remove the stains entirely; Biological washing powders contain enzymes similar to the digestive enzymes …
Biological washing powder may contains : Proteases to digest protein stains , lipase to digest fat stains [ e.g. egg yolk ] and amylase to digest starch [ e.g rice or bread ] . The enzymes are usually mixed with detergents . manufacturers will recommend a washing temperature that is not so high that it will denature the enzymes .
Jul 27, 2019·Biological washing powders Hot water must be used with washing powders so it is important that the containing enzymes have a high optimum temperature – otherwise they would just become denatured. The enzymes are often obtained from thermophillic bacteria found in hot springs, and have a optimum temperature of 70 degrees celcius.
Enzymes are used in biological washing powder, they can break down stains at lower temperatures, this not only saves the user money (in heating the water) but it is better for the environment. Enzymes in digestion Enzymes control many reactions in the human body. However, we are going to look specifically at those involved in digestion. 100 50 ...
Explain how enzymes in biological washing powders act to remove food and blood stains from clothes. [4] (d) When blood clots, an enzyme is activated to change a protein from one form into another. Describe the process of blood clotting. [3] [Total: 14]
Cambridge IGCSE™ BIOLOGY 0610/41 Paper 4 Theory (Extended) May/June 2020 MARK SCHEME ... biological washing powder is more effective, ... no enzyme-substrate complex / no successful collisions ; 2 . 0610/41 Cambridge IGCSE – Mark Scheme PUBLISHED
B1 - 1 Key concepts in Biology - Questions Q1. ... DNA can code for the amino acids in the active site of an enzyme. ... Washing powders can be biological or non-biological. Describe how biological washing powders can make clothes cleaner than nonbiological washing
Biological detergents contain protein-digesting enzymes produced by genetically engineered bacteria. Many of the stains on clothes, like blood and …
Chromosomes are a packaged form of DNA. The DNA normally exists in a non-condensed form in the cell nucleus (upper right). It condenses into chromosomes (centre and lower left) during cell replication. Human cells contain 46 chromosomes, which are in pairs. Sex cells (sperm and ova) contain only 23 chromosomes.
Cambridge IGCSE™ BIOLOGY 1522/12 Paper 1 Multiple Choice (Core) May/June 2021 ... Do not write on any bar codes. ... 38 What do biological washing powders contain? A bacteria B enzymes C herbicides D vitamins . 16
Edexcel IGCSE Revision notes Written by Tim Filtness 9 Enzymes: - Are proteins - Are biological catalysts (speed up chemical reactions) - Are specific to one particular Substrate - Are affected by temperature and pH - Are not used up in the reaction they catalyze 1. Initially, raising the tem perature increases the rate of reaction. 2.
Enzymes are used in biological washing powders • Proteases break down the coloured, insoluble proteins that cause stains to smaller, colourless soluble polypeptides. • Can wash at lower temperatures Enzymes are used in the food industry • Pectinase break down substances in apple cell walls and enable greater juice extraction.
Cambridge IGCSE BIOLOGY 0610/01 Paper 1 Multiple Choice (Core) For examination from 2023 ... enzyme B active site active site product enzyme C substrate enzyme D active site product substrate ... Dusing biological washing powders . Created Date: 8/26/2020 11:05:24 AM ...
Absorption is movement of digested food molecules through the wall of the intestine into the blood or lymph.The small intestine is especially adapted to allow absorption to take place very efficiently. It has a very rich blood supply. Digested food molecules are small enough to pass through the wall of the intestine into the bloodstream.
-Enzymes in biological washing powders are very effective at removing stains. -Biological washing powders can be used at lower temperatures. -Used in medicine to diagnose, control or cure disease. -Industry, costs of equipment and energy can be reduced. Disadvantages. Annotations: -Misuse of washing powders can cause allergic reactions on skin.
BIOLOGY 0610/31 Paper 3 Extended May/June 2009 1 hour 15 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams or graphs.