Observations: Test Sample Observations Water   Glucose   Fructose   Arabinose   Inferences: What is the principle behind this test?     What kind of sugars will give a positive result to this test?

Q: Match the chemical reaction to the visual effect of the product/biochemical test description…

A: 1. Assay's colour change relies on intial reduction reaction resulting in a black precipitate if the…

Q: If a sample of beeswax is found to have an acid number of 15.5 and saponification value of 71.2, the…

A: Given values: Saponification value = 71.2 Acid number = 15.5

Q: What is the result for the yellow tube of Methyl red test? What must the pH be in each tube? What is…

A: Methyl red test This test usually aims to differentiate the facultative anaerobes enteric bacteria.…

Q: We have used SAR as an estimate of purity. How else could you test for purity of the phycocyanin…

A: Phycocyanin is a pigment belonging to the phycobiliprotein family. It is often considered as an…

Q: Which of the following statements best describe testing of lactose sample?*       A. Lactose will…

A: Lactose is a reducing disaccharide . It is formed as β-D-galactose forms a 1,4 glycosidic bond with…

Q: Why would it be important to run Benedict's Test on a test tube containing starch + amylase?

A: Benedict's test identifies the presence of reducing sugar in the given sample. Simple carb…

Q: Qualitative Analysis of Carbohydrates HELP Reducing sugars (glucose & lactose) reduce the deep blue…

A: A carbohydrate is an organic compound having carbon, hydrogen, and oxygen and with the general…

Q: Positive with Molisch Test, but negative with both Iodine Test and Benedict's Test.       Glucose…

A: Carbohydrates are identified with different tests like Molisch, Iodine,Benedicts test.

Q: You requested the following media/reagents for your unknown. What are you testing for with each…

A: The majority of bacteriological culture media are available commercially as pre-made or as bases…

Q: Five sweetener samples (labelled A to E) were tested by 97 individuals for the intensity of their…

A: Carbohydrates or carbs are maconutrient consisting of Carbon, hydrogen and oxygen atoms. In nature…

Q: All recipes are given per litre unless specified.   Lambda Broth (LB) Plates…

A: Give, The final volume (V2) = 5mL. The stock concentration of MgSO4 (C1)= 1M The desired…

Q: What nutrients do the following media components contain?   Peptone   Yeast extract   Beef…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: Type of Medium Original Color Any Chemicals Added to Visualize Reaction? Negative Result Positive…

A: Phenol red Glucose original colour will be yellow.  Negative results indicates that there is drop in…

Q: what does it mean when bubbles shows during a catalase test

A: Bacteria are a group of prokaryotic microscopic single celled organisms. They live in diverse…

Q: Calculate the amount of phycocyanin in Sample 1 in mg where A620=0.211   and A650=0.086, taking into…

A: Phycocyanin is a protein-pigment complex that belongs to the family of phycobiliprotein. It is a…

Q: carbonydrate sample reacCts positively With all test reagents except for Lugol s. The sample could…

A: Carbohydrates: Carbohydrates or saccharides consist of carbon, hydrogen, and oxygen and it is the…

Q: Before using the top agar, maltose and MgSO4 must be added. Why are maltose and MgSO4 added after…

A: Given, The stock concentration of maltose is 20% Required concentration is ~0.2% Final  volume is…

Q: Nitrate reduction to nitrite is indicated by the formation of a pink to red colour after addition of…

A: Sulfanilic acid reacts with nitrous acid to form diazotized sulfanilic acid if introduced. This…

Q: A plant isolate was subjected to qualitative tests to determine the presence of macromolecules.…

A: Plant isolates are obtained from different tissue homogenate samples of plant parts. Usually, a…

Q: 50 mg/50 ml kinetin stock is available  You need 2.5 mg/l kn for Ms media  calculate amount of kn is…

A: A culture medium is a liquid or semi-solid mixture of various nutrients that support microorganism…

Q: How many H2O particle were produced by creating the following structur f the starting reagent is…

A: Introduction The number of water molecules formed = Total number of glucose molecules - 1 So,…

Q: Principle, reagents and procedure of Mann's methyl blue eosin.

A: * Methyl blue eosin is a Polychromatic solution for staining in used in histology.  * It is mainly…

Q: Which of the following statements best describe testing of lactose sample? Lactose will quickly…

A: Lactose is a reducing sugar made up of 2 units, one is glucose and galactose. It is made up of two…

Q: 11. all of the following give a positive results in benedict test exept: O galactose O xylose O…

A: Benedict solution is a mixture of copper sulfate, sodium carbonate and sodium citrate. This solution…

Q: Calculate the amount of phycocyanin in Sample x in mg where A620=0.191   and A650=0.093, taking into…

A: Phycocyanin is a photosynthetic pigment. It is a blue color pigment. The concentration of…

Q: The following are the sugars that formed brick red precipitate during Barfoed's test, except:*   A.…

A: Barfoed's test is the specific test for the identification of reducing monosacharides. Reducing…

Q: Explain the preservation method used in homemade pickled ginger and discuss the biochemical changes…

A: Pickling is the process of preserving edible products in an acid solution, usually vinegar, or in…

Q: You have a sample at 50 ng/ul and you would like to load 400ng of this sample on a lane of an…

A: Agarose gel electrophoresis is a technique to study the features of genetic material and proteins.…

Q: Given Test Reagent Positive or Negative Result Reason/Explanation Lime Soda Molisch Test…

A: Carbohydrates are widely distributed in plants and animals and they have important structural and…

Q: Compare and contrast Benedict's Tests for identifying reducing sugars and non-reducing sugars. What…

A: Carbohydrate is a macromolecules which is formed of carbon , hydrogen as well as oxygen . It is…

Q: colored. Interpretation: () Lactose Observed that the addition of the Benedict reagent to the…

A: Carbohydrates or carbs are macronutrients consisting of Carbon, hydrogen, and oxygen atoms. In…

Q: If a sample is composed of a mixture of maltose, maltodextrin, and glucose, which of the following…

A: Sugars capable of reducing ferric or cupric ions are called reducing sugars. All monosaccharides…

Q: What is the purpose of PSP (Phenolsulfonpthalein) Test?

A: Please follow step 2 for detailed explanations.

Q: What are the colour changes occur to the reducing sugars after benedict test is performed? Please…

A: Reducing sugar is a sugar that is capable to act as a reducing agent.  Reducing sugars are the ones…

Q: Date Sheet Extraction ODD EVEN ODD EVEN GROUP   Single Extraction 1 Single Extraction 2…

A: Extraction is a process of separation of components present in plant or animal tissues by means of…

Q: Match the following: Schiff test Tollen’s test Fehling’s test Benedict's test Iodoform test 2,4-DNP…

A: 1. Schiff test-Bounded aldehydes When schiffs base is added to aldehyde, it combines with H2SO3 ans…

Q: ESR

A: ESR testing or erythrocyte sedimentation rate checks how fast the red blood cells in a blood sample…

Q: A photo-sensitive organic reagent is exposed to 50 milliWatt ruby red laser light (694

A:

Q: in order to obtalh organic compouhds from the obtained plant ekstaktin in pure form, it is used…

A: In Order To Obtain Organic Compounds from Plant Ekstaktin  in pure form -- Organic Compounds…

Q: a) Four solutions were made up; one containing glucose, one containing starch, one containing…

A: Lipids are hydrocarbon-containing molecules that make up the building blocks of living cells'…

Q: What is the best interpretation for the results below? Test/s Results Ninhydrin Fohl's Test Biuret…

A: Proteins are composed of twenty standard amino acids attached together via peptide bonds. These…

Q: Starch Hydrolysis: In many tests it is acceptable to read a positive result before the inoculation…

A: Starch hydrolysis test is used to identify a bacterial species. In this test, test bacteria are…

Q: An unknown solution contains a single pure sugar. It gives positive results to Molisch’s and…

A: The qualitative tests are used to identify the presence of certain sugar in the given sample.…

Q: How much agarose need for 40 mls of 1.5%w/v ge

A: 1.5% gel means 1.5g of agarose in 100 mL.

Q: Benedicts Test: Reagent’s Composition   Observations: Test Sample Observations 0.1M glucose   0.04…

A: Glucose is a monosaccharide that contains six atoms of carbon and an aldehyde group, hence, it is an…

Q: An unknown carbohydrate gave a brick-red precipitate when tested with Fehling’s reagents, turned red…

A: Carbohydrates are a polyhydroxy compound, composed of carbons, hydrogen, and an oxygen atom. It is…

Q: C. Chemical Nature of Polyphenoloxidase Enzyme Activity (Color Intensity) Light pink (Moderate…

A: Biochemical reactions that occur in the living cells are catalyzed by enzymes.

Q: Both Glucose and galactose are known to be epimers. To differentiate these two sugars, what test…

A: There are many biomolecules are found in the human body.  Carbohydrates, proteins, lipids, and…

Q: Multiple choice (Refer to picture)   Which of the statements is NOT TRUE about the sample in…

A: Salkowski test is a biochemical assay used to detect sterols and cholesterols. Option A - A positive…

Substance Abuse

Substance abuse refers to the use of illegal drugs in excessive quantities, as well as the misuse of legal substances such as prescription or over-the-counter pharmaceuticals or alcohol for purposes other than those intended. Drug addiction, also known as substance use disorder, is a disease that affects the brain and behavior of a person. It leads to a failure to control the use of any drug or prescription, legal or illegal.