Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Chapter 3, Problem 4MCQ
Summary Introduction
Introduction: Chlorophyll is a green pigment present in chloroplasts of plants, algae, and cyanobacteria. This pigment absorbs light during photosynthesis and converts it to photochemical energy.
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Chapter 3 Solutions
Microbiology: An Introduction
Ch. 3 - Fill in the following blanks. 1. 1 m = ________ m...Ch. 3 - Prob. 2RCh. 3 - Prob. 3RCh. 3 - Prob. 4RCh. 3 - Prob. 5RCh. 3 - Why is a mordant used in the Gram stain? In the...Ch. 3 - Prob. 7RCh. 3 - Prob. 8RCh. 3 - Fill in the following table regarding the Gram...Ch. 3 - NAME IT A sputum sample from Calle, a 30-year-old...
Ch. 3 - Through the microscope, the green structures are...Ch. 3 - Prob. 2MCQCh. 3 - Carbolfuchsin can be used as a simple stain and a...Ch. 3 - Prob. 4MCQCh. 3 - Which of the following is not a functionally...Ch. 3 - Which of the following pairs is mismatched? 1....Ch. 3 - Assume you stain Clostridium by applying a basic...Ch. 3 - Prob. 8MCQCh. 3 - In 1996, scientists described a new tapeworm...Ch. 3 - Prob. 10MCQCh. 3 - Prob. 1ACh. 3 - Prob. 2ACh. 3 - Why isnt the Gram stain used on acid-fast...Ch. 3 - Endospores can be seen as refractile structures in...Ch. 3 - In 1882, German bacteriologist Paul Erhlich...Ch. 3 - Laboratory diagnosis of Neisseria gonorrhoeae...Ch. 3 - Assume that you are viewing a Gram-stained sample...
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- The bacterial cells in the image below were stained with a high concentration of carbolfuschin for an extended period of time (5 minutes) while the slide was heated. The slide was decolorized with a mixture of acid and alcohol. The slide was then counter-stained with methylene blue. What kind of stain does this describe?arrow_forward1. What is the purpose for using stains? What microbial characteristics can one ascertain from a simple stain? 2. Why is it necessary to make a heat-fix smear and what are the disadvantages of heat fixing? 3. what is the best age for your culture when performing a gram stain? Why? 4. Why is Gean staining considered a differential staining process? 5. What are some reasons a Gram positive cell might appear Gram negative?arrow_forwardReferences V8 ish (U.S.) Q Search f4 Review A AB I Text Predictions: On View Help BIU Part 2: 15 Cell components seen Illumination (ii) Complete the table comparing the light and electron microscopes. The table should fit on a single A4 sheet. Specimen preparation Image formation Magnification Tell me what you want to do Resolution Editor Suggestions! Showing H O E C t Αν Α f6 (iii) Explain the difference between magnification and resolution. E✓ ✓ f7 ) Light Microscope f8 19 E Ev Co A Electron Microscope f10 (A. C.1.2) 0 f11 V 12 Comments ✓ Dictate + 10 Rain CC scrollarrow_forward
- 1. What does medical microbiology study? How are aniline dye solutions prepared? How to calculate the total magnification of a microscope? 2. 3.arrow_forwardThis part of the staining process helps the primary stain to remain in the cell during decolorization. O 1) Secondary stain O 2) primary stain O 3) counterstain O 4) fixing reagent O 5) mordantarrow_forwardI have a microscope with oculars that are 20x and am viewing a slide using oculars that are 50x. What is the overall magnification?arrow_forward
- A colleague performs a smear prep from a colony on an agar plate. Without staining it, he looks at it under oil immersion with a light microscope (1000x magnification). “Hm," he says, "it's not purple, so it must be gram negative." Briefly explain the error in his logic, and say what he would have to do to show whether the organism is gram negative or gram positive. Your Answer:arrow_forwardA novice microbiology student incorrectly explains that immersion oil increases the magnification of his microscope. What is the function of immersion oil?arrow_forwardWhat is the difference between total magnification and objective magnification? You are looking at an organism on the 20x objective What is the total magnification? If the organism takes up 62 units on the ocular micrometer, how big is the organism is micrometers? Show your work.arrow_forward
- The acid-fast stain is used to stain _____. The decolorizer used to destain the cells is ______. Positive cells that retain the primary stain are ______, while negative cells are counterstained with _____ and will have a ______ color. *Please use answers from the options provided in the image below.arrow_forwardStaining microbes are important techniques to characterize microbes in any microbiology laboratory. In your opinion, which of the four staining procedures is the most important? In your answer, be specific about why you chose that techniquearrow_forwardSelect all that apply to a negative stain: 1. involves a washing step 2. cells may be distorted or shrunken 3. uses an acidic or negatively charged dye which stains the background 4. uses multiple dyes in the procedure 5. uses only 1 dye in the procedure 6. involves fixing 7. does not involve fixing 8. cells will not be distorted or shrunken 9. does not involve a washing step 10. can show cell morphology, size, and arrangement 11. uses a basic or positively charged dye which stains the bacterial cellsarrow_forward
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