Unit 1 Lesson 1 Key Question Biology SBI4U-C ILC 1) Mg2+ Has 10 electrons. 2) Carbon -14 would not be effective at dating bones that are millions of years old. Carbon -14 is effective at dating to a maximum of 40 000 to 50 000 years old. The isotope decays over time and would not be present on bones that are millions of years old. 3) Hydrolysis - Water used to breakdown molecules. Hydro means water and lysis means to breakdown. An example of hydrolysis in action within our bodies is how our
Premium Enzyme PH Acid
Dropper Introduction: This Lab shows the detection of different food sources using different tests. Some of the food tests carried out was Benedict’s test‚ the test for non-reducing sugars‚ iodine test (test for starches)‚ emulsion test and the biuret test. Carbohydrates include reducing and non-reducing sugars also starches. They have a general Formula of CnH2nOn.They can be classified into three main groups‚ Monosaccharide‚ Disaccharide and polysaccharide. Carbohydrates have many uses such
Premium Starch Glucose Protein
green (++)‚ yellow (+++) and orange red/rust (large amount +++: glucose/dextrose and equal) appeared‚ the concentration of reducing sugar indicated a positive test. Although‚ when the appearance did not change and remained the color of the Benedicts’ reagent of blue‚ indicated no reducing sugars‚ or a negative (-) test (water‚ table sugar solution‚ gelatin‚ egg white solution‚ and unknown (A3) solution). As for the Iodine stain‚ the color changes of bluish black (indicated plant starch; cornstarch solution
Premium Starch Carbohydrate Glucose
Test Biuret Test Reagents CuSO4 sol’n‚ diluted NaOH Test for Intact proteins and protein hydrlysates (at least tripeptide‚ 2 peptide bonds Result Pink to violet blue color Ninhyrin Test 1‚2‚3-indanetrione monohydrate or triketohydintene hydrate‚ ethanol Alpha- amino group (usually a general test for amino acids) Xanthoproteic Test Conc. HNO3‚ conc. NaOH For W‚F‚Y (aromatic except for H) Blue to blue-violet Oxidative decarboxylation color & deamination
Premium Amino acid Protein Ammonia
Polyhydroxyketones (ketoses) - Classifications: Test for reducing sugars Reagent: CuSO4‚ sodium citrate and sodium carbonate in a mildly basic solution Positive test: Brick red precipitate OSAZONE TEST 1. Simple - monosaccharides 2. Complex – disaccharides‚ polysaccharides - Hemiacetals/Hemiketals - Dehydration test to identify carbohydrates from non-carbohydrates Reagent: Molisch reagent (10% α-napthol in ethanol) and conc. H2SO4 Positive test: Purple ring at the interface
Premium Carboxylic acid Acid Ammonia
Lipids And Nucleic Acids Professor Anthony Depass Biology 1 9/25/14 Introduction: By completing lab exercise 6 : Biologically Important Molecules‚ we are able to perform tests such as the Benedicts Test for Reducing Sugars‚ Iodine Test‚ Biuret Test‚ Sudan IV Test‚ and lastly the Grease-Spot Test that detect the presence of biologically important carbohydrates‚ protein lipids and nucleic acids. Most known compounds in living organism are if fact carbohydrates‚ lipids‚ proteins‚ and nucleic
Premium Metabolism Protein Glucose
Polysaccharides change color in the presence of iodine solution: Glycogen gives a red-brown color and starch a dark blue–violet color. While simple sugars‚ having an aldehyde group‚ or a ketone group act as reducing agents in the presence of Benedict’s reagent producing a range of colors from green to brown depending on the degree of reduction they exhibit. In a solution of sufficiently high pH‚ sugars can reduce weak oxidizing agents such as cupric ions. Benedict’s solution contains sodium bicarbonate
Free Glucose Carbohydrate Starch
BIOLOGY LABORATORY Biologically Important Molecules Carbohydrates‚ Proteins‚ Lipids‚ and Nucleic Acids Objectives In this lab you will learn to: 1. Perform tests to detect the presence of carbohydrates‚ lipids‚ proteins‚ and nucleic acids 2. Recognize the importance of a control in a biochemical test 3. Use biochemical tests to identify an unknown compound Introduction Organic molecules are those primarily made up of carbon‚ hydrogen and oxygen. The common organic compounds of living
Premium Amino acid Glucose Protein
those nutrients. Materials: 2 safety goggles 1 eye dropper Heat source 2 beakers 4 test tubes 1 test tube clamp 1 test tube rack 1 glass stirring rod 3 teaspoons canned whole-kernel corn 10 ml fresh‚ whole‚pasteurized milk 1 small biuret reagent 1 small benedicts solution 1 small bottle iodine 1 small bottle sudan 4 1 blender Procedures: 1)Heat water in a graduated cylinder . 2)Blend your corn in the blender and add as much water so that it turns into a liquid. 3)Pour 10 ml
Premium Scientific method Experiment Laboratory glassware
BSC 2010C.LAB TH 7-9:50pm 29 August 2013 Biology Lab Report Lab #1 –PROTEIN EXTRACTION LAB I. INTRODUCTION To begin the process of protein extraction and compare the results in a study‚ it is necessary to understand the importance of proteins‚ the process of extraction and how you are using the results to determine a rational conclusion. First understand proteins and the necessity of studying their impact. Proteins are essential molecules for biological functions and are the
Premium Protein Molecular biology Gel electrophoresis