Peptidoglycan Study guides, Class notes & Summaries

Hershey and Chase performed an experiment in order to determine how bacteriophages infect bacteria. What did they find? CORRECT ANSWER The bacteriophage injects DNA into the host cell. This was found because, after centrifugation, the pellet was radioactive The largest difference between a Gram + and Gram - bacterial cell is: CORRECT ANSWER The gram + cell has a much thicker peptidoglycan layer Why does a Gram + cell stain blue/purple in a gram stain? CORRECT ANSWER The Gram + cell stains ...

What type of antibiotic is good for bloodstream infections - bacteriostatic or bacteriocidal? - Answer- Bacteriocidal T/F? Penicillin is a broad spectrum antibiotic? - Answer- False, it is narrow spectrum What broad classes of bacteria does penicillin cover? - Answer- - Gram + - Anaerobes What are the 2 classes of cell wall synthesis inhibitors? - Answer- 1. Beta-Lactams: these bind to and blocks transpeptidase (a penicillin binding protein) and prevent formation of the cross-links in ...

Test Bank Microbiology: An Introduction, 13th Edition Gerard J. Tortora Table of Contents: Part I: Fundamentals of Microbiology Chapter 1. The Microbial World and You Chapter 2. Chemical Principles Chapter 3. Observing Microorganisms through a Microscope Chapter 4. Functional Anatomy of Prokaryotic and Eukaryotic Cells Chapter 5. Microbial Metabolism Chapter 6. Microbial Growth Chapter 7. The Control of Microbial Growth Chapter 8. Microbial Genetics Chapter 9. Biotechnology and DNA Technology Pa...

BIOD 171 Portage Learning Final EXAM Questions and Answers 100%Correct/Exam 1-7 2023/2024 UpdatePortage Learning BIOD 171 Final EXAM Questions and Answers 100%Correct/Exam 1-7 2023/2024 Update True or False: A virus is considered a microorganism. False. Viruses are not living and as such are not considered microorganisms. Viruses can, however, be classified as microbes, a more general term that includes microorganisms and viruses. 1. What is the smallest biological unit of life? A cell. ...

If a human has a serious bacterial infection, which bacterial target or targets could be useful targets when designing bacterial antibiotics? a. 40S ribosomal subunits b. gyrase c. a peptidoglycan biosynthesis enzyme d. B and C e. A, B and C - d. B and C (gyrase, a peptidoglycan biosynthesis enzyme) With regards to modern medicine, pathogenicity and pharmacology, it is very important that one understand one fundamental concept. That concept is that researchers will look for and attack en...

Gram Negative Bacteria CORRECT ANSWER - inner membrane - lipoproteins on both sides of cell wall - thin cell wall= peptidoglycan - outer membrane - lipopolysaccharides (LPS)= located in the outer membrane - S-layer - Capsule Gram Positive Bacteria CORRECT ANSWER - inner membrane - thick cell wall= composed of lipoteichoic acid and peptidoglycan -Teichoic acid wall - S-layer - Capsule Lipopolysaccharide CORRECT ANSWER - found only in Gram negative - on the surface of the outer...

MIC 102 Exam Questions with Correct Answers What are the three main subgroups of Eukaryotes? - Answer-Algae, Protozoa, Fungi What subgroup does Algae and Protozoa make? - Answer-Protists DESCRIBE THE ROLE OF A PLASMA MEMBRANE AND A CELL WALL. - Answer- What's the difference between Basic & Differential Stain? - Answer-Basic Stain: Allows you to determine the basic structure of a bacteria (rod, etc) Differential Stain: Uses more than one stain --> most popular: the gram stain. ...

MICROBIOLOGY FINALS EXAM REVIEW Chapter 3 Eukaryotes cells are defined by the presence of a membrane bound nucleus The two magnifying lenses found in the light microscope are the —ocular and objective The major criteria used in placing bacteria into different groups is based on differences in — cell wall structure. In a basic staining procedure, correct order: smear, fix, stain SFX The acid fast stain— is useful for distinguish a small group of organisms, including mycobacterium an...

Why do we stain microbes? CORRECT ANSWER Increase Contrast What chemical attribute do basic stains have? CORRECT ANSWER A cation What are some basic stain examples? CORRECT ANSWER Methylene blue, crystal violet What chemical attribute do acidic stains have? CORRECT ANSWER An anion What is an example of an acidic stain? CORRECT ANSWER Nigrosin What is the biggest part of smear prep? CORRECT ANSWER Heat fix the bacteria What is peptidoglycan? CORRECT ANSWER bacteria specific cell...

What are the 5 ways drugs kill organisms - ️️Cell Wall Synthesis Inhibitors Plasma Membrane Damage Protein Synthesis Inhibition Nucleic Acid Synthesis Inhibition Metabolic Pathway Inhibition Cell wall inhibitors - ️️Beta lactam Glycopeptide Beta Lactam drugs - ️️Penicillin Cephalosporin Carbapenem Monobactam Glycopeptide drugs - ️️Vancomycin Teicoplanin Links amino acids (D-ala-D-ala) in peptidoglycan - ️️Transpeptidase (PBP) Links glucans (NAM & NAG) in peptido...