TEST BANK SOLUTIONS FOR MICROBIOLOGY FUNDAMENTALS: A CLINICAL APPROACH 3RD EDITION BY COWAN 2023/2024.

Chapter 1 Introduction to Microbes and Their Building Blocks (McGraw Hill)-Homework 1. Which of the following choices is a correct way to denote the binomial name of a microorganism? Multiple Choice • Staphylococcus Aureus (correct answer) Explanation The binomial, or scientific name, of a microorganism must be typed in italics or underlined if handwritten. In addition, the first letter of the generic part of the name must be capitalized while the first letter of the species name is lowercase. 2. Which of the following is a macromolecule that assembles into bilayers? Multiple Choice • Phospholipid (correct answer) • Nucleic acid • Carbohydrate • Protein 3. Please watch the video below, and then use what you have learned from the chapter to answer the questions, demonstrating your understanding of biofilms. 1.) What is a biofilm? • Free-floating bacteria that move through the blood to other sites • A group of bacteria that accumulate in layers and secrete protective extracellular material • A layer of sugars that persist even after bacteria have been killed by antibiotics • A bacterial cell that secretes an extensive network of fibers around its cell wall Incorrect This study source was downloaded by from CourseH on :45:52 GMT -05:00 S - The Marketplace to Buy and Sell your Study Material Downloaded by: GradeA | Distribution of this document is illegal Lipids 2. ) Which of the following is an example of a biofilm commonly found in the human body? • Dental plaque Correct • Salivary secretions • Ear wax • Yellow or green discharge 3.) Why are biofilms important in infectious disease? • Bacteria in biofilms are often protected from antibiotics. • Most microbes cannot cause disease without other microbes present. • The secreted extracellular "gunk" is highly damaging to tissues. Explanation Question 1: Bacteria attach to a surface and excrete a sticky extracellular substance. Other species can be recruited to the biofilm, and the result is layers of multiple species of bacterial surrounded by a protective coating. Question 2: Dental plaque is a biofilm on the surface of your teeth! Question 3: Antibiotics are often blocked by the protective coating found in biofilms. Also, bacteria may express different genes when they are part of a biofilm and become less susceptible to antimicrobial drugs. 4. Match the macromolecules to their function within cells. Major structural component of cell walls Major component of cell membranes Correct Correct Speed up and facilitate chemical reactions within cells Inheritance and expression of genetic traits Correct Correct Explanation DNA and RNA are nucleic acids involved in genetics. Enzymes are proteins that speed up chemical reactions. Phospholipids make up the bulk of the cell membrane, and several different types of carbohydrates make up the cell wall in organisms that possess one. 5. Microbes are found in which habitat(s)? All of choices are correct (Ocean, Earth’s crust, and Human Body) This study source was downloaded by from CourseH on :45:52 GMT -05:00 Carbohydrates Nucleic acids Proteins S - The Marketplace to Buy and Sell your Study Material Downloaded