Microbiology: A Systems Approach
4th Edition
ISBN: 9780073402437
Author: Marjorie Kelly Cowan Professor
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 7, Problem 10MCQ
In a viable plate count, each _____ represents a _____ from the sample population.
- a. cell, colony
- b. colony, cell
- c. hour, generation
- d. cell, generation
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Select the correct answer from the answers provided. In a viable plate count, each ch represents a a from the sample population. a. cell, colony c. hour, generation b. colony, cell d. cell, generation
Which of the following is false about counting viable cells?
A. CFU(Colony forming unit) are counted instead of individuals cells
B. Only 30-300 CFUs are statistically valid
C. Colonies growing on the plate represent a fraction of the live cells in the original sample
D. You can determine the number of live cells in a broth culture
E. It is necessary to multiply the by CFUs to determine the number of viable cells in the original sample
A colony of bacteria or fungi
A. are one single individual
B. Cannot survive on agar
C. Is formed from one individual that replicated in the same spot
D. Cannot both survive on the same petri dish
Chapter 7 Solutions
Microbiology: A Systems Approach
Ch. 7.1 - List the essential nutrients of a bacterial cell.Ch. 7.1 - Prob. 2AYPCh. 7.1 - List and define four different terms that describe...Ch. 7.1 - Define saprobe and parasite, and provide microbial...Ch. 7.1 - Prob. 5AYPCh. 7.1 - Identify the effects of isotonic, hypotonic, and...Ch. 7.1 - Name two types of passive transport and three...Ch. 7.2 - Prob. 2CFCh. 7.2 - List and define five terms used to express a...Ch. 7.2 - Prob. 9AYP
Ch. 7.2 - Prob. 10AYPCh. 7.2 - Prob. 11AYPCh. 7.2 - Discuss characteristics of biofilms that...Ch. 7.3 - Summarize the steps of cell division used by most...Ch. 7.3 - Define doubling time and describe how it leads to...Ch. 7.3 - Compare and contrast the four phases of growth in...Ch. 7.3 - Prob. 16AYPCh. 7 - Prob. 1CFCh. 7 - The source of the necessary elements of life is a....Ch. 7 - An organism that can synthesize all its required...Ch. 7 - Chemoautotrophs can survive on ______ alone. a....Ch. 7 - Prob. 4MCQCh. 7 - Prob. 5MCQCh. 7 - Prob. 6MCQCh. 7 - A cell exposed to a hypertonic environment will...Ch. 7 - Prob. 8MCQCh. 7 - Prob. 9MCQCh. 7 - In a viable plate count, each _____ represents a...Ch. 7 - Prob. 11TFCh. 7 - Prob. 12TFCh. 7 - Prob. 13TFCh. 7 - Prob. 14TFCh. 7 - Prob. 15TFCh. 7 - Prob. 1CTQCh. 7 - Prob. 2CTQCh. 7 - Prob. 3CTQCh. 7 - Prob. 4CTQCh. 7 - Prob. 5CTQCh. 7 - Prob. 6CTQCh. 7 - Prob. 7CTQCh. 7 - Prob. 8CTQCh. 7 - Prob. 9CTQCh. 7 - Prob. 1CCCh. 7 - Prob. 2CCCh. 7 - Prob. 1VCCh. 7 - Prob. 2VCCh. 7 - Using the words that follow, please create a...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The term culture refers to the _____________ growth of microorganisms in_________ . a. rapid, an incubator b. macroscopic, media c. microscopic, the body d. artificial, coloniesarrow_forwardIn a new batch of culture medium, a group of sub-lethally wounded bacterial cells were transferred. Determine which stage of bacterial growth it will be in? a. Lag Phase b. Log Phase c. Stationary Phase d. Death Phasearrow_forwardWhich of the following statement about normal flora is INCORRECT? Question 3 options: A On Sabouraud's agar, yeast will appear as small creamy colonies and mold will have large fuzzy colonies B Alpha and gamma hemolysis is produced by Streptococcus species C Normal flora never cause disease D A healthy person can carry pathogens like MRSA and Proprionibacterium acnes on our skin E The growth of S. aureus turns the color of MSA to yellowarrow_forward
- When you see mold on a slice of bread,you are seeing a single cell of mold. A.True B.Falsearrow_forward4. You have a culture of yeast that is at a density of 8x107 cells/mL. You dilute the sample 1:10, then 1:1,000 again, and finally you dilute the sample an additional 1:5. You add 0.1 mL of the final dilution to a spread plate. Assuming that most of the cells in the original culture were living, how many colony- forming units do you expect to count on your pour plate the next day?arrow_forwardDefine the following: 1. Morphology - 2. Colony -arrow_forward
- You are looking at a white cottony growth on a culture medium. Microscopic examination reveals it is multicellular. You can conclude all of the following about this microorganism except that it: a. has cell walls b. has DNA enclosed in a nucleus c. is a bacterium d. absorbs organic nutrientsarrow_forwardYou collected 1000 mL of river water from the stream running through campus. You prepared dilutionsof the water as follows:Tube A. 0.5 mL of river water + 99.5 mL of sterile waterTube B. 1 mL from Tube A + 9 mL of sterile waterTube C. 1 mL from Tube B + 9 mL of sterile waterTube D. 1 mL from Tube C + 9 mL of sterile waterYou then plated 0.1 mL of each dilution onto each of three MacConkey agar plates. (MacConkey agar is type of selective,differential medium. It inhibits the growth of Gram-positive microorganisms and non-enteric Gram-negative bacteria.Among the bacteria not inhibited by the medium, lactose-fermenting bacteria form pink colonies and bacteria that do notferment lactose form colorless colonies.) After incubation, the colonies were too numerous to count on the platesprepared from dilutions A, B, and C. For the plates prepared from dilution D you counted the following numbers ofcolonies:Plate 1: 155 pink colonies and 50 colorless coloniesPlate 2: 165 pink colonies and 55…arrow_forwardWhich of the following is an acellular microorganism lacking a nucleus?a. bacterium b. helminth. c. protozoan d. virusarrow_forward
- Many species of bacteria live bound together by a gluelike substance that, among other things, makes up the plaque on human teeth. This is an example of a ____. a. vesicle b. biofilm c. colony d. mass e. pilusarrow_forwardYou collected 1000 mL of river water from the streamrunning through campus. You prepared dilutions of the water as follows:Tube A. 0.5 mL of river water + 99.5 mL of sterile waterTube B. 1 mL from Tube A + 9 mL of sterile waterTube C. 1 mL from Tube B + 9 mL of sterile waterTube D. 1 mL from Tube C + 9 mL of sterile waterYou then plated 0.1 mL of each dilution onto each of three MacConkey agarplates. (MacConkey agar is type of selective, differential medium. It inhibitsthe growth of Gram-positive microorganisms and non-enteric Gram-negative bacteria. Among the bacteria not inhibited by the medium,lactose-fermenting bacteria form pink colonies and bacteria that do notferment lactose form colorless colonies.) After incubation, the colonieswere too numerous to count on the plates prepared from dilutions A, B, andC. For the plates prepared from dilution D you counted the followingnumbers of colonies:Plate 1: 157 pink colonies and 62 colorless coloniesPlate 2: 167 pink colonies and 67…arrow_forwardIn a plate count, 1 mL of culture is spread on a plate and incubated for 24 hours. 250 colonies are counted. Answer the question below. there were _____cells in the 1 mL of culture that was spread on the plate. If the culture was diluted 1:100 prior to plating, how many cells were there per mL in the original culture? _________arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Basic Clinical Lab Competencies for Respiratory C...NursingISBN:9781285244662Author:WhitePublisher:Cengage
Basic Clinical Lab Competencies for Respiratory C...
Nursing
ISBN:9781285244662
Author:White
Publisher:Cengage
The Cell Cycle and its Regulation; Author: Professor Dave Explains;https://www.youtube.com/watch?v=eqJqhA8HSJ0;License: Standard YouTube License, CC-BY
Cell Division - Mitosis and Meiosis - GCSE Biology (9-1); Author: Mr Exham Biology;https://www.youtube.com/watch?v=w7vp_uRA8kw;License: Standard YouTube License, CC-BY