Read and or download the questions listed below. Answering the questions below will help you practice using what you know about macromolecules. Once there carefully read and follow instructions to test substances for the presence of the four macromolecules. When you have completed your work, submit it to the dropbox entitled Virtual Macromolecule Labs.

Carbohydrates Lab :. List the steps and reagent used to test for simple sugars : What does a positive test reaction look like? List the steps and reagent used to test for starch: What does a positive test reaction look like? Protein Lab :. Lipids Lab :. Foods :. Perform the carbohydrate, protein and lipids tests on the foods shown and record the positive test results below:.

Test for Carbohydrates, Proteins and Fats - MeitY OLabs

All Rights Reserved. Date last modified: October 2, Created with SoftChalk LessonBuilder. Terms of Use SoftChalk 9. Biology Biochemistry. Virtual Macromolecule Labs Read and or download the questions listed below. Protein Lab : List the steps and reagent used to test for protein: What does a positive test reaction look like?

Lipids Lab : List the steps and reagent used to test for lipids: What does a positive test reaction look like?By the end of this lab, the student should be able to:. The Benedict's test identifies reducing sugars monosaccharide's and some disaccharideswhich have free ketone or aldehyde functional groups. The groups reduce CuSO 4, a component of Benedicts, resulting in a color change in the benedicts solution from a turquoise to a brick to rusty-brown color.

Another class of carbohydrates called starches, a polysaccharide, can be detected using the Iodine's test. The Biuret's test identifies proteins by oxidizing peptide bonds of a protein using CuSO 4 and NaOH resulting in a color change in the CuSO 4 solution from purple to a darker purple color.

Sudan is a red, non-polar, dye that forms hydrophobic interactions with the hydrocarbon chains of lipids.

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Alternatively, the Brown Bag test can also be used to identify lipids due to the oily nature of hydrocarbon chains. Some sugars such as glucose are called reducing sugars because they are capable of transferring hydrogens electrons to other compounds, a process called reduction. When reducing sugars are mixed with Benedicts reagent and heated, a reduction reaction causes the Benedicts reagent to change color. The color varies from green to dark red brick or rusty-brown, depending on the amount of and type of sugar.

Increasing amounts of reducing sugar. In a typical Benedicts Test shown belowapproximately 1 ml of sample is placed into a clean test tube along with10 drops of Benedict's reagent CuSO 4. The reactions are heated in a boiling water bath for 5 minutes. Below: The test solutions and Benedict's reagent are boiled in a water bath for five minutes. Below: Results of several solutions tested with the Benedict's test.

Activity 1: Draw a large chart containing four equally divided columns and seven rows. In the first column, label rows with the appropriate samples below:. In the second column labeled "Color of Heated Reactions", indicate the results of the Benedict's test after the reaction was heated. In the fourth column, draw the reacting functional group s of the samples that reacted with the benedict's reagent. Iodine solution IKI reacts with starch to produce a dark purple or black color.

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KI Reagent: Iodine is not very soluble in water, therefore the iodine reagent is made by dissolving iodine in water in the presence of potassium iodide. This makes a linear triiodide ion complex which is soluble.Draw either the molecular or structural formula for each of the following organic molecules.

Carbohydrates lipids proteins and nucleic acids. Biological molecules worksheet answers. Twenty common amino acids can combine in various ways to make different protein molecules. There are four categories of organic molecules. For each of the following polymers draw or otherwise define the monomer units that make up the polymer to the rest of the community. Wlhsbiologyoppelt name biomolecule review worksheet organic molecules organic molecules are the molecules which exist in all living things.

Answer the following questions and turn them in to your instructor. Structure and methods of analysis using the text provided on the web site and using the models of the molecules provided in lab. The two groups of monosaccharides that are most important to biologists have how. A carboxyl group cooh an amine group nh2 a hydrogen atom h and a side group that varies depending on the type of amino acid.

Some of the worksheets displayed are work for biology biological molecules structure chapter 3 biological molecules lecture 4 biological molecules chemistry of life biological molecules of life macromolecules exercise ver8 organic macromolecules cloze work biology summer work work. Biological macromolecules worksheet exercise 1. They are lifes building blocks.

He begins with a brief discussion of polymerization. Learn vocabulary terms and more with flashcards games and other study tools. All things are formed from these organic molecules. Worksheet for biology biological molecules. Biological moleculeswhat are the building blocks of life. So that we attempted to uncover some great 22 biological molecules worksheet answers graphic for your needs.

Showing top 8 worksheets in the category biological molecules. Honestly we have been noticed that 22 biological molecules worksheet answers is being just about the most popular issue with regard to document example at this moment.

Dehydration synthesis is used to connect monomers into polymers and hydrolysis breaks them down again. Amino acids are made of a central carbon bonded to 4 different groups. The major characteristics of nucleic acids are described as well as there directionality from 3 to 5 end. Biological molecules how are organic molecules synthesized.

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With this quiz and printable worksheet you can find out how much you know about the major elements in biological molecules. Paul andersen describes the four major biological molecules found in living things. Ib Organic Molecules Review Key 2 1 2 3. Biological Molecules Worksheet Oaklandeffect. Bio Lab Report 2 Biomolecules Carbohydrates.

Macromolecules Review Worksheet Answer Key. Biomolecules Crossword Wordmint. Macromolecules Worksheet 2.

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Biological Molecules Biology I. Biomolecules Worksheet Homeschooldressage Com. Key Organic Macromolecules Worksheet. Biological Molecules Worksheet Answers.Biological systems are made up of four major classes of macromolecules: carbohydrates, lipids, proteins, and nucleic acids nucleic acids will be covered separately later.

lab 3 biological molecules answers

Carbohydrates are the most abundant macromolecules on earth, and the source of immediate energy needs in living systems. Carbohydrates also participate in defining the structure of cells and living systems. There are 3 general chemical grouping for carbohydrates: monosaccharides, disaccharides, and polysaccharides.

Monosaccharides, also referred to as simple sugars, are made up of a single sugar molecule. The major example of a monosaccharide is glucose C 6 H 12 O 6. Other monosaccharides include isomers of glucose, such as fructose and galactose. Monosaccharides are transported in the blood of animals, broken down to produce chemical energy inside the cell, and can also be found within other macromolecules, such as nucleic acids.

Disaccharides are composed of two single monomers of sugar linked together. Disaccharides are broken down into their subunits for use inside living systems.

Polysaccharides are polymers, or long chains of sugar monomers linked together, and are stored inside the cell for future energy use.

In plants, the major storage polysaccharide is starch, while in animals it is glycogen. Plants also contain cellulose, which is the most abundant of all carbohydrates. Cellulose is found in the plant cell wall, where it provides structure and support to the plant cell. Lipids are nonpolar macromolecules; thus they are insoluble in water.

They include oils and fats, phospholipids, and steroids. Fatty acids can be classified as saturated or unsaturated.

lab 3 biological molecules answers

An example of a saturated fat is butter, while an example of an unsaturated fat is vegetable oil. Phospholipids are found primarily in the cell membranes of living systems, of which they are the major component. Structurally, a phospholipid contains a hydrophilic head and a hydrophobic tail. Steroids are lipids which are typically made up of fused hydrocarbon rings. Each type of steroid is different in the type of chemically active functional groups that it contains.

Examples of steroids include cholesterol, estrogen, and testosterone. Cholesterol found in the cell membrane of animals, where it provides structural support.

Cholesterol is also the precursor for other steroids, such as testosterone and estrogen. Some vitamins, such as Vitamin D, are also classified as steroids. Proteins are polymers of amino acids.

There are twenty naturally occurring amino acids, and each amino acid has a unique side-chain or R-group. Amino acids are connected by peptide bonds to form protein polymers.

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This gives rise to different levels of structure for proteins. At this level, structures called alpha-helices and beta-sheets are visible. Proteins have numerous biological functions.Lab 1: The Scientific Method The scientific method is central to the study of biology: it is a process of acquiring and verifying information through experimentation. The general steps of the scientific method are depicted in the figure below. The hypothesis, or suggested explanation for the observation, is the basis for setting up experiments.

A good experimental design is essential to the scientific method. A few keys to good experimental design include effective use of controls, reproducibility, a large sample size, and Lab 2: Taxonomy Because the diversity of life on Earth is so vast, biologists use a general system of classification and naming organisms taxonomy to track and organize species based on evolutionary relatedness.

Biological Molecules - Lab Report Example

The broadest taxon is the domain; organisms belong to one of the three domains Bacteria, Archaea, and Eukarya. Within the domains are increasingly specific taxa, ranging from kingdom and phylum all the way to genus and species. In this lab, you will be learning the basics of taxonomy and its usage.

lab 3 biological molecules answers

Lab 3: Biological Molecules Biological systems are made up of four major classes of macromolecules: carbohydrates, lipids, proteins, and nucleic acids nucleic acids will be covered separately later. In this lab, you will perform different tests to confirm the existence of each macromolecule.

Then, you will use these techniques to identify the macromolecules present in the unknown mixture. Lab 4: Microscopy A microscope is an instrument that magnifies an object so that it may be seen by the observer. In addition to magnification, microscopes also provide resolution. A combination of magnification and resolution is necessary to clearly view specimens under the microscope. In this lab, parts of the microscope will be reviewed. Students will learn the proper use and care of the microscope and observe samples from pond water.

Lab 5: Cells The cell theory states that all living things are composed of cells, which are the basic units of life, and that all cells arise from existing cells. In this course, we closely study both types of cells: prokaryotic and eukaryotic.

There are vast differences between cell types but a few features are common to all cells. In this lab, bacterial, animal, and plant cells will be observed using the microscope. Students will draw what was visualized to record their observations. Lab 6: Diffusion and Osmosis Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.

This movement, down the concentration gradient, continues until molecules are evenly distributed. Osmosis is a special type of diffusion: the diffusion of water through a semipermeable membrane.

In this lab, you will observe both diffusion and osmosis through different surfaces. Lab 7: Enzymes Enzymes are biological catalysts and are usually proteins. They greatly increase the rate of chemical reactions by lowering the activation energy, which is the energy required to start a reaction.

The metabolism of a cell depends on enzymes functioning correctly.Forgot your password? Speak now. Quiz: Biology Questions On Biomolecules. Please take the quiz to rate it. All questions 5 questions 6 questions 7 questions 8 questions 9 questions 10 questions 11 questions 12 questions 13 questions 14 questions 15 questions 16 questions 17 questions 18 questions 19 questions 20 questions 21 questions 22 questions 23 questions.

Feedback During the Quiz End of Quiz. Play as Quiz Flashcard. Title of New Duplicated Quiz:. Duplicate Quiz Cancel. More Biomolecule Quizzes. Chemistry: Biomolecule Trivia Quiz Questions! Online Test : Biomolecules. Biomolecules, Including Enzymes Quiz. Featured Quizzes. The Office Trivia Quiz!

Related Topics. Questions and Answers. Remove Excerpt. Removing question excerpt is a premium feature. Which is an amino acid? Which elements are in nucleotides nucleic acids. Which elements are in proteins? Classify this lipid. Polymers of the following types of compounds are made by dehydration synthesis:. Explain how enzymes work. Include in your explanation the graph of activation energy compared between a reaction with an enzyme and without an enzyme.

Also include in your explanation what a catalyst is, and relate it to enzymes. What are the factors affecting enzyme activity? Back to top. Sign In with your ProProfs account.Introduction: This experiment was meant to teach us the four kinds of macromolecules: proteins, lipids, carbohydrates, and nucleic acids.

We are to perform 4 tests which will determine if the four macromolecules are present. A Macromolecule is a large molecule that has small molecules that link together. There are four kinds of macromolecules. These include: lipids, proteins, carbohydrates, and nucleic acids. Lipids are organic compounds that are oily when touching and are not soluble.

Examples of lipids are: waxes, oils, steroids, fatty acids. This would include fish, sunflower seeds, canola oil, and green vegetables.

Lipids are very beneficial for the body. They allow brain function, protective layer for organs, natural steroids, and supporting the reproductive system. In this experiment we will use Sudan III to test for lipids on filtered paper. Proteins are long chains of amino acids. These amino acids are compounds made up of one amino group and one carboxyl group. There are two types: essential and nonessential. In total, there are twenty.

In this experiment, we will use Biurets reagent to detect if there are proteins present. Carbohydrates are the bodys main source of energy. They can be stored for quick use, immediate use, or later use.

Lab 3: Biological Molecules

Carbohydrates are produced in green plants during photosynthesis. There are to types of carbohydrates: simple and complex.

Simple carbohydrates are also known as simple sugars. Complex carbohydrates are at least three linked sugar molecules. Complex carbohydrates are often found in whole grain foods, yams, and beans. In this experiment, we will use Benedicts reagent to find reducing sugars that are present, and the IKI solution is used to find the starch present in foods.

These are essential and responsible for all the genetic makeup of all living organisms. As the positive controls in our experiments we have: glucose for the sugar test, starch and the potato for the starch test, vegetable oil for the lipids, and milk for protein.

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For the unknown, I would say we will be able to know exactly what it is by the end of this experiment and what category it belongs under. Testing for Sugars and Starches: 1. Properly put on safety glasses and goggles. Gently shake bottle to dissolve the unknown substance into the water. Separate eggs white and yolk. Catch egg whites in plastic cup. Place all six test tubes in the well plate for a test tube holder.

Use albumin pipet to measure 0. Use a pipet for albumin to measure 4.

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