MCB 2289L Microbiology LearnSmart Lab Module 04 Quiz

Microbiology LearnSmart Module 04 Quiz Question 1 1 out of 1 points Encapsulated organisms are difcult to directly stain because ___ Selected Answer: The capsule is not permeable to most stains Question 2 1 out of 1 points Which of the following diseases are caused by acid-fast bacterium: Selected Answer: Tuberculosis (TB) Question 3 1 out of 1 points The purpose of heat fxation is to _______. Selected Answer: Inactivate and adhere microorganism placed on the slide Question 4 1 out of 1 points All of the following are true regarding bacterial smears EXCEPT Selected Answer: Bacterial smears are used to treat infectious diseases Question 5 1 out of 1 points In the Acid-fast stain, non-acid-fast bacteria appear pink under the microscope Selected Answer: Fals e Question 6 1 out of 1 points Why might it be important to perform a Gram stain on bacterial cells? Selected Answer: As part of the information used to choose an appropriate antibiotic treatment Question 7 1 out of 1 points This study source was downloaded by from CourseH on :52:08 GMT -05:00 This study resource was shared via CourseHGram negative cells appear purple after Gram staining whereas gram positive cells appear pink Selected Answer: Fals e Question 8 1 out of 1 points ________ is used to stain the endospore in the endospore staining procedure Selected Answer: Malachite green Question 9 1 out of 1 points In order to withstand hostile conditions and facilitate survival, some bacteria produce resistant structures known as: Selected Answer: Endospor es Question 10 1 out of 1 points Gram negative cells walls contain a thin layer of peptidoglycan whereas Gram positive cell walls contain a thick layer of peptidoglycan Selected Answer: Tru e Question 11 1 out of 1 points In a differential staining technique, a ______ is used to remove the primary stain from the bacterial cell wall Selected Answer: Decoloriz er Question 12 1 out of 1 points In the Gram stain, the chemical that fxes dye in or on cells by forming an insoluble compound in referred to as the _______________? Selected Answer: morda nt Question 13 1 out of 1 points This study source was downloaded by from CourseH on :52:08 GMT -05:00 This study resource was shared via CourseHIn a negative stain, which of the following is stained? Selected Answer: Backgrou nd Question 14 1 out of 1 points During a simple stain, what will happen in the heat fxation step is omitted? Selected Answer: The cells may wash off the slide Question 15 1 out of 1 points Spherical cells arranged in chains are called __________. Selected Answer: Streptoco cci Question 16 1 out of 1 points Staining allows for visualization of bacterial cells because it increases contrast during microscopic imaging? Selected Answer: Tru e Question 17 1 out of 1 points A simple stain provides enough information about a microbe to clearly identify its species: Selected Answer: Fals e Question 18 1 out of 1 points The frst dye applied in a differential staining technique is referred to as the counterstain Selected Answer: Fals e Question 19 1 out of 1 points Staining techniques do NOT provide information on which of the following structures? Selected Answer: Ribosom es This study source was downloaded by from CourseH on :52:08 GMT -05:00 This study resource was shared via CourseHQuestion 20 1 out of 1 points Stains are commonly used for all of the following EXCEPT Selected Answer: The treatment of disease This study source was downloaded by from CourseH on :52:08 GMT -05:00 This study resource was shared via CourseH Powered by TCPDF ()