1. Why do we commonly use stains when viewing bacteria under the microscope? What is the...
1. Why do we commonly use stains when viewing bacteria under the microscope? What is the most commonly used differential staining procedure and what characteristics of the cell does the procedure differentiate?
Homework Answers
While viewing bacteria under the microscope, it is essential to differentiate each cell from the othert and the organelles inside them. Stains help to enhance the visualization as the cell components are now coloured and also, if applicable, stains help to highlight metabolic processes in the cells.
The most commonly used differential staining procedure is Gram Staining.
The Gram staining differentiates between gram positive and gram negative cells. The gram positive cells have a thick peptidoglycan cell wall which easily retains the gram's iodine stain.The gram negative cells on the other hand, have thinner or little peptidoglycan layers in the cell wall and show light staining with gram's iodine. So the gram staining procedure primarily differentiates the cell wall characteristics of bacteria.
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1. Why do we commonly use stains when viewing bacteria under the
microscope? What is the...
5. Why are simple stains able to "stick” to bacteria? Explain the chemical properties of the...
5. Why are simple stains able to "stick” to bacteria? Explain the chemical properties of the stain and bacteria surface. 3-Preparation of Bacterial Smears and Simple Stains Introduction Microbial cultures are handled using aseptic technique. Aseptie technique is a set of procedures used to minimize contamination of materials by microorganisms from the environment, and to minimize the spread of cultures around the laboratory. In this experiment, you will be using an inoculating loop to transfer bacteria from a culture tube...
1. Describe several advantages of differential staining procedures compared with simple staining techniques. 2. Give the...
1. Describe several advantages of differential staining procedures compared with simple staining techniques. 2. Give the purpose of each of the following reagents in a differential staining procedure: a. Primary stain b. Counter stain c. Decolorizing agent d. Mordant 3. Why is it important for the counter stain to be a lighter color than the primary stain? 4. You have done gram staining for a gram positive bacteria, but at the end you observed pinkish-red bacteria under microscope, what was...
1. Identify the basic shapes of bacteria and formation under the microscope. 2. Describe how bacteria...
1. Identify the basic shapes of bacteria and formation under the microscope. 2. Describe how bacteria are identified and named under the microscope. 3. Distinguish between Gram positive and Gram negative bacteria. 4. Explain the ways bacteria reproduce themselves. 5. Describe what makes prokaryotic cells different from eukaryotic cells. 6. Identify the internal and external structure of bacteria. 7. Define plasmids and how bacteria use them 8. Describe the 2 categories of bacteria found in the Moneran kingdom. 9. Bacterial...
1) What is the purpose for using stains? 2) Why is it necessary to make a...
1) What is the purpose for using stains? 2) Why is it necessary to make a heat -fixed smear and what are the disadvantages of test fixing? 3) what is the benefit to using immersion oil when viewing bacteria? 4) When preparing a heat-fixed smear, what are some differences between liquid and solid. media? 5) Once oil has been added to your slide , which objective (s) can be used? cannot be used?
• What is microbiology? What are the types of microorganisms in Microbiology? • Review the microscope...
• What is microbiology? What are the types of microorganisms in Microbiology? • Review the microscope parts? • The definition of: Aseptic technique, spectrophotometer, Absorbance (Optical density), Transmission, Turbidity, Serial Dilution, Unicellular organisms, Colony morphology, Culture, Selective media, Differential media, Synthetic media, Brownian movement • What are the three main chemical components of the stains? • What is the mechanism of the negative stain? • What is the procedure of each of the following stain and list all the dyes...
1. There are other staining procedures beyond simple staining and differential staining. Examples include endospore, acid-fast,...
1. There are other staining procedures beyond simple staining and differential staining. Examples include endospore, acid-fast, capsule, and flagella stains. Please pick one staining technique to research and answer the following questions: • What is the theory behind the staining technique, what stains are used, how are they applied, what portion of the bacteria are they reacting with • How is this stain used to differentiate or identify bacterial cells or cell structures? • Describe the staining technique. List and...
question 8 and 10 1. Identify the basic shapes of bacteria and formation under the microscope....
question 8 and 10
1. Identify the basic shapes of bacteria and formation under the microscope. 2. Describe how bacteria are identified and named under the microscope. 3. Distinguish between Gram positive and Gram negative bacteria. 4. Explain the ways bacteria reproduce themselves. 5. Describe what makes prokaryotic cells different from eukaryotic cells. 6. Identify the internal and external structure of bacteria. 7. Define plasmids and how bacteria use them 8. Describe the 2 categories of bacteria found in the...
all questions ASSESSMENT Critical Thinking and Learning Outcomes Review 1. What are the two purposes of...
all questions
ASSESSMENT Critical Thinking and Learning Outcomes Review 1. What are the two purposes of heat fixation? 2. What is the purpose of simple staining? 3. Why are basic dyes more successful in staining bacteria than acidic dyes? 4. Name three basic stains 5. Why is time an important factor in simple staining? 6. How would you define a properly prepared bacterial smear? 7. Why should you use an inoculating needle when making smears from solid media? An inoculating...
Name 3 differences between a dissecting microscope and a compound microscope. If we were studying a...
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When Brian looked under the microscope, he found bacteria thriving inside the amoebae. He was surprised...
When Brian looked under the microscope, he found bacteria thriving inside the amoebae. He was surprised and called Sid over to look. “Wow, that’s unexpected. I wonder what would happen if you add antibiotics to some of the amoebae.” Brian thought about the other experiments he was supposed to be doing , but then decided he was interested enough to continue with this side project. He took Sid’s suggestion and added antibiotics to some of the amoebae. When he added...
5. Why are simple stains able to "stick” to bacteria? Explain the chemical properties of the stain and bacteria surface. 3-Preparation of Bacterial Smears and Simple Stains Introduction Microbial cultures are handled using aseptic technique. Aseptie technique is a set of procedures used to minimize contamination of materials by microorganisms from the environment, and to minimize the spread of cultures around the laboratory. In this experiment, you will be using an inoculating loop to transfer bacteria from a culture tube...
1. Describe several advantages of differential staining procedures compared with simple staining techniques. 2. Give the purpose of each of the following reagents in a differential staining procedure: a. Primary stain b. Counter stain c. Decolorizing agent d. Mordant 3. Why is it important for the counter stain to be a lighter color than the primary stain? 4. You have done gram staining for a gram positive bacteria, but at the end you observed pinkish-red bacteria under microscope, what was...
1. Identify the basic shapes of bacteria and formation under the microscope. 2. Describe how bacteria are identified and named under the microscope. 3. Distinguish between Gram positive and Gram negative bacteria. 4. Explain the ways bacteria reproduce themselves. 5. Describe what makes prokaryotic cells different from eukaryotic cells. 6. Identify the internal and external structure of bacteria. 7. Define plasmids and how bacteria use them 8. Describe the 2 categories of bacteria found in the Moneran kingdom. 9. Bacterial...
• What is microbiology? What are the types of microorganisms in Microbiology? • Review the microscope parts? • The definition of: Aseptic technique, spectrophotometer, Absorbance (Optical density), Transmission, Turbidity, Serial Dilution, Unicellular organisms, Colony morphology, Culture, Selective media, Differential media, Synthetic media, Brownian movement • What are the three main chemical components of the stains? • What is the mechanism of the negative stain? • What is the procedure of each of the following stain and list all the dyes...
question 8 and 10
1. Identify the basic shapes of bacteria and formation under the microscope. 2. Describe how bacteria are identified and named under the microscope. 3. Distinguish between Gram positive and Gram negative bacteria. 4. Explain the ways bacteria reproduce themselves. 5. Describe what makes prokaryotic cells different from eukaryotic cells. 6. Identify the internal and external structure of bacteria. 7. Define plasmids and how bacteria use them 8. Describe the 2 categories of bacteria found in the...
all questions
ASSESSMENT Critical Thinking and Learning Outcomes Review 1. What are the two purposes of heat fixation? 2. What is the purpose of simple staining? 3. Why are basic dyes more successful in staining bacteria than acidic dyes? 4. Name three basic stains 5. Why is time an important factor in simple staining? 6. How would you define a properly prepared bacterial smear? 7. Why should you use an inoculating needle when making smears from solid media? An inoculating...
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