food with distilled water. Squeeze the ground materials through layers of muslin. Liquid: Put 1 cm3 of the liquid food sample into test tubes. -grease spot test: A drop of liquid food sample was added to a filter paper and was let to dry for 5 minutes. The filter paper was held up to the light and any translucent spot was observed. The filter paper was put into an organic solvent. it was taken out and let to dry The filter paper was examine against light again. (positive result
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7/30/2015 Assignment [ print page ] Assignment Background Information: Scientists have found that almost all living organisms have a gene that codes for a protein called Cytochrome C. This protein is important in releasing energy from food. Scientists study similarities such as the gene that codes for Cytochrome C in hopes to learn more about the universal genetic code and the relationship between living organisms on Earth. Procedure: The charts below lists a portion of the amino acids found in
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KOLEJ MATRIKULASI MELAKA 78300 MASJID TANAH‚ MELAKA Guidelines for Biology Experiments 1.0 Attendance 1.1 Attendance to practical sessions is COMPULSORY. 1.2 If you cannot come to the class due to ill health or emergency excuses‚ please inform the lecturer EARLIER‚ so that another practical session can be arranged for you ON THE SAME WEEK. 2.0 Lab coat 2.1 Wearing lab coat is COMPULSORY. 2.2 Put on the lab coat throughout the class. 3.0 Jotter 3.1 Jotters should contain the summary on the PROCEDURES
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non-heated lamp - 1½ of a Petri dish - 1 ruler - 1 plastic spoon - 5 Porcellio scaber Method: 1. Collect the materials listed above. Next‚ plug-in the non-heated lamp and position it so that it is 19cm away from where the Porcellio scaber will be placed (measure this distance with a ruler). Then place the squared paper directly below the lamp and place the timer conveniently next to it. Then pick-up a plastic spoon and remove 5 Porcellio scaber from their
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Summer Assignment – AP Biology – Chapters 2-5 Chapter 2 1. CHNOPS are the six most crucial elements in most macromolecules. Name them. Carbon‚ Hydrogen‚ Nitrogen‚ Oxygen‚ Phosphorous‚ Sulfur. 2. Create a chart and state how many bonds each of the CHNOPS elements can form. Carbon | Hydrogen | Nitrogen | Oxygen | Phosphorous | Sulfur | 4 | 1 | 3 | 2 | 3 or 5 | 2 | 3. Create a Venn Diagram to compare and contrast polar covalent bonds‚ nonpolar covalent bonds‚ and ionic bonds.
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Calculate in m2 the exact area the of the kitchen. xvi) Write down both length and width correct to 1d.p. xvii) Calculate the percentage error made if the area was calculated using the length and width correct to 1 d.p. xviii) Consider the numbers 5‚ ‚ -3‚ ‚ and the number sets N‚ Z‚ Q and R. Write which set each number belong in. xix) The relative frequencies of the popularity of certain brands of cleaner are displayed in the table below. Estimate the probability of someone using BRITE.
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AP® BIOLOGY 2009 SCORING GUIDELINES (Form B) Question 3 Water is essential to all living things. (a) Discuss THREE properties of water. (b) Explain each of the following in terms of the properties of water. You are not limited to the three properties discussed in part (a): • • • the role of water as a medium for the metabolic processes of cells the ability of water to moderate temperature within living organisms and in organisms’ environments the movement of water from the roots to
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1. By exhaling out carbon dioxide into the straw on top of the bromothymol blue indicator‚ the solution will turn the color blue into a yellowish-green color. When there is a presence of something that is acidic the BTB indicator changes its color into yellow/green. So in this case‚ the water with BTB and carbon dioxide exhaled into the flask creates a carbonic acid. As an aerobic activity increase than the carbon dioxide rate increases as well. 2. By exercising more‚ one’s body requires more
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Acids & Bases Lab Write Up Lab 2 Introduction There are many acids and bases all around us. An acid is known as a hydrogen ion donor (H¯)‚ and a base is known as a hydrogen ion acceptor (H⁺). Acids and bases are represented by the pH scale. The pH scale shows the strength that an acid or base has. This scale ranges from 0-14‚ with 0-6 being acids‚ 8-14 being bases‚ and 7 being neutral‚ such as water. This is defined as the negative log of an ion atom (pH=
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Dissolved Oxygen and Aquatic Primary Productivity By: Mayank Makwana AP Biology Mrs. Biondo September 19‚ 2012 Design Diagram Dissolved Oxygen: Title: The effect of the temperature of water on the concentration of dissolved oxygen Hypothesis: If the temperature of the water is increased‚ then the concentration of dissolved oxygen will decrease. |Independent Variable: Temperature of water (Cº)
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