MIP 300 - Exam 1 questions with complete solutions 2023/2024

MIP 300 - Exam 1You isolate a bacterium and chemically analyze its peptidoglycan. You find that it contains 8 different types of amino acids and 2 types of carbohydrate. What type of bacterium could this have been isolated from? - correct answer Gram positive You isolate a bacterium and chemically analyze its peptidoglycan. You find that it contains 6 different types of amino acids and 2 types of carbohydrate. What type of bacterium could this have been isolated from? - correct answer Gram positive You isolate a bacterium and chemically analyze its peptidoglycan. You find that it contains 5 different types of amino acids and 2 types of carbohydrate. What type of bacterium could this have been isolated from? - correct answer Gram positive Both gram positive and gram negative organisms have tetra-peptides - correct answer true Which of the following can be altered in a gram negative organism, giving rise to differing thicknesses in the peptidoglycan layer? - correct answer Number of sheets Both gram positive and gram negative organisms have NAG and NAM - correct answer True Which of the following will have 80 ribosomes - correct answer Fungi All microorganism have ribosomes - correct answer False You are performing a Gram stain and at the end realize you forgot to add the Crystal Violet, how will a Gram positive and Gram negative bacteria appear? - correct answer Gram positive = pink Gram negative = pink You are performing a Gram stain and at the end realize you forgot to add the alcohol, how will a Gram positive and Gram negative bacteria appear? - correct answer Gram positive = purple Gram negative = purple You isolate a bacterium without an interbridege in its peptidoglycan layer. How would you expect this bacterium to stain with a Gram stain? - correct answer Pink You isolate a bacterium with a 45nm peptidoglycan layer that contains teichioic acid. How would you expect this bacterium to stain with a Gram stain? - correct answer Purple You isolate a bacterium that can form spores. What color would would you expect this bacterium to stain with a Gram stain? - correct answer Purple You isolate a bacterium that produces mycolic acid around its cell wall. You forgot to heat the primary stain during your acid fast staining procedure. What color will your bacteria appear? - correct answer Clear Inclusion bodies use membranes to tightly control movement of materials in and out of the inclusion body - correct answer False Which of the following can be found in a bacterial cell - correct answer Plasmids The core of a bacterial endospore contains larger quantities of ___ than do vegetative cells - correct answer Dipicolinic acid The number of amino acids in the tetrapeptide can be altered in both Gram positive and negative bactiera, resulting in differences in peptidoglcyan thickness - correct answer False The number of NAG and NAM sheets can be varied in both Gram positive and Gram negative bacteria, resulting in differences in the peptidogyclan thickness - correct answer True