A Quiz On Microbial Growth

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  • 1/15 Questions

    Chemical growth requirements essential for microorganism growth is.

    • Water only
    • Environmental waste.
    • Product from other bacterial waste
    • Water,carbon,oxygen,phosphorus,Nitrogen,sulfur and trace element
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About This Quiz

Microbes are all around the environment, and their infectious ability also regulates human life. Play this informative quiz on microbial growth and see how well you know the topic. This quiz contains questions that cover various aspects of microbiology and other biochemical processes that will enhance your knowledge base. Play the quiz to know more and answer the questions asked in the quiz. If you like the quiz, do share it with your friends and family. All the best!

A Quiz On Microbial Growth - Quiz

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  • 2. 

    Aseptic technique refers to carry out a procedure under controlled conditions in a manner that will minimize the chance of contamination. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Aseptic technique is a method used to perform procedures in a way that reduces the risk of contamination. This means that the procedure is carried out under controlled conditions, such as using sterile equipment and maintaining a sterile environment. By following aseptic technique, the chances of introducing harmful microorganisms into the procedure are minimized, ensuring a safer and more effective outcome. Therefore, the statement that aseptic technique refers to carrying out a procedure under controlled conditions to minimize contamination is true.

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  • 3. 

    Selective media contain agents that inhibit the growth of certain bacteria while permitting the growth of other.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Selective media are specifically formulated to promote the growth of certain types of bacteria while inhibiting the growth of others. These media contain substances such as antibiotics, dyes, or chemicals that create an environment unfavorable for the growth of certain bacteria. By selectively inhibiting the growth of unwanted bacteria, selective media allow for the isolation and identification of specific bacterial species or groups. Therefore, the statement that selective media contain agents that inhibit the growth of certain bacteria while permitting the growth of others is true.

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  • 4. 

    Growth are referring to the number of cells, not the size.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The increasing of bacterial size does not show the increasing of bacterial growth.

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  • 5. 

    Psychrophiles are those bacteria that able to grow under........

    • 0 – 20ºC

    • 25 – 40ºC

    • 50 – 60 ºC

    • 70 – 110 ºC

    Correct Answer
    A. 0 – 20ºC
    Explanation
    Mesophiles : 25 – 40ºC
    Moderate thermophiles : 50 – 60 ºC
    Extreme thremophiles : 70 – 110 ºC

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  • 6. 

    Bacteria mainly grow via binary fission. Some can grow by 

    • Budding only

    • Spores only

    • Budding,spores, or fragmentation

    • None of the above

    Correct Answer
    A. Budding,spores, or fragmentation
    Explanation
    Some bacteria able to grow via budding,spores or fragmentation

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  • 7. 

    What are the factor that shifting the phase to the decline phase ?

    • Condition in the medium become less but cell still have the ability to divide rapidly

    • Condition in the medium become less and cell lose their ability to divide

    • Number of live cells increases at a logarithmic rate

    Correct Answer
    A. Condition in the medium become less and cell lose their ability to divide
    Explanation
    Condition in the medium become less because there are too many competition to get the limited nutrient and on top of that, many side product produce by the microorganism cause the condition become unfavorable to grow.So,when this occur,cell will lose their ability to divide and eventually the organism will die.

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  • 8. 

    Tolerance referring to the survival of bacteria under conditions in which they cannot grow.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Tolerance refers to the ability of bacteria to survive under conditions in which they cannot grow. This means that even though the bacteria may not be able to reproduce or thrive, they are still able to survive in these unfavorable conditions. Therefore, the statement "Tolerance referring to the survival of bacteria under conditions in which they cannot grow" is true.

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  • 9. 

    Mac Conkey’s agar is a differential media that contains lactose as substrate and neutral red as an indicator. This agar is used to

    • Differentiate lactose fermenters from non-lactose fermenters

    • Differentiate sucrose fermenters with non-sucrose fermenters bacteria.

    • Differentiate glucose fermenters with non - glucose fermenters

    • Identify the bacteria that able to degrade peptone into amino acid.

    Correct Answer
    A. Differentiate lactose fermenters from non-lactose fermenters
    Explanation
    Bacteria that able to ferment lactose in Macconkey agar plate will give red colour on the growth.

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  • 10. 

    Osmosis is one of the processes in passive transportation. What is the movement of the water when there's high solute concentration outside the cell?

    • Water move from inside to outside cell

    • Water move from outside to inside cell

    • There's no net movement of water molecules.

    • None of the above

    Correct Answer
    A. Water move from inside to outside cell
    Explanation
    Osmosis is the net movement of water molecules from the high concentration gradient to lower concentration gradient ?

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  • 11. 

    Blood agar is unable to cultivate the fastidious microorganisms 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Blood agar able to cultivate all the fastidious microorganism

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  • 12. 

    Microorganism obtained their carbon source from the carbon dioxide are called?

    • Chemotroph

    • Autotroph

    • Heterotroph

    • Saprophyte

    Correct Answer
    A. Autotroph
    Explanation
    Autotroph obtain their carbon source from the carbon dioxide.

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  • 13. 

    Organisms do not increase significantly in number and produce large quantities of energy in the form of ATP. Which of the phase in the exponential growth curve explains these statements?

    • Lag phase

    • Stationary phase

    • Log phase

    • Decline phase

    Correct Answer
    A. Lag phase
    Explanation
    In lag phase, organisms do not increase significantly in number and produce large quantities of energy in the form of ATP

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  • 14. 

    Microorganisms obtain their carbon source in many different ways. Those that able to get the carbon source from the organic compound are called?

    • Autotroph

    • Chemotroph

    • Heterotroph

    • Organotroph

    Correct Answer
    A. Heterotroph
    Explanation
    Heterotroph get their carbon source from the organic compound.

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  • 15. 

    Which is the following the main requirement(s) for the bacteria to grow?

    • Oxygen requirement

    • Nutrient requirement

    • Oxygen and nutrient requirement

    • Physical and chemical requirement

    Correct Answer
    A. Physical and chemical requirement
    Explanation
    physical and chemical requirement are the basic/main requirement required by the bacteria to grow whereas the other is just an example of physical and chemical requirement.

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  • Current Version
  • Aug 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 17, 2014
    Quiz Created by
    Mokrysalimi
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