Factors Affecting Microbial Growth: Temperature

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

What is the condition called when the cell membrane and cytoplasm shrink away from the cell wall?

  • Cytolysis
  • Plasmoptysis
  • Hypolysis
  • Plasmolysis (correct)

In which type of solution would a bacterial cell likely burst if it lacks a rigid cell wall?

  • Isotonic solution
  • Alkaline solution
  • Hypotonic solution (correct)
  • Hypertonic solution

What is the term for organisms that prefer to live in salty environments?

  • Halophilic organisms (correct)
  • Acidophiles
  • Haloduric organisms
  • Alkaliphiles

Microbes capable of surviving in high atmospheric pressure are known as what?

<p>Piezophiles (D)</p> Signup and view all the answers

What happens if a bacterial cell is placed in an isotonic solution?

<p>It will remain unchanged (D)</p> Signup and view all the answers

If the concentration of solutes outside a cell is greater than inside, what kind of solution is it?

<p>Hypertonic solution (D)</p> Signup and view all the answers

Which type of microorganism prefers cold temperatures, such as deep ocean water?

<p>Psychrophiles (A)</p> Signup and view all the answers

What is the preferred pH range for most microorganisms in terms of growth medium?

<p>7.0–7.4 (A)</p> Signup and view all the answers

What happens when the concentration of solutes in the external environment of a cell is greater than that inside the cell?

<p>The cell undergoes plasmolysis (B)</p> Signup and view all the answers

What is the preferred pH range for Acidophiles?

<p>2 to 5 (A)</p> Signup and view all the answers

Which microorganism group prefers warm temperatures but can endure very cold or freezing temperatures?

<p>Psychroduric organisms (B)</p> Signup and view all the answers

What is the term for the movement of a solvent from a lower to a higher concentration of solutes through a permeable membrane?

<p>Osmosis (C)</p> Signup and view all the answers

What is the term for microorganisms that grow best at high temperatures?

<p>Thermophiles (D)</p> Signup and view all the answers

Which type of microorganism is most likely to thrive in a hypertonic solution?

<p>Halophiles (A)</p> Signup and view all the answers

At what temperature would a mesophile likely exhibit optimal growth?

<p>37ºC (A)</p> Signup and view all the answers

Which pH range is generally preferred by acidophiles for growth?

<p>pH 3-5 (B)</p> Signup and view all the answers

How do hypertonic solutions affect microbial cells?

<p>Cause <em>plasmolysis</em> by drawing water out of the cells (A)</p> Signup and view all the answers

Which would be the best environment for alkaliphiles to grow successfully?

<p><em>Basic</em> solution with pH 10 (A)</p> Signup and view all the answers

Flashcards are hidden until you start studying

Study Notes

  • Plasmolysis occurs when bacteria with rigid cell walls are placed in a hypertonic solution, causing the cell membrane and cytoplasm to shrink away from the cell wall.
  • A hypotonic solution has a lower solute concentration outside the cell compared to inside, potentially leading to plasmoptysis if a bacterial cell bursts.
  • Isotonic solutions have equal solute concentrations inside and outside the cell, affecting microbial growth.
  • Halophilic organisms thrive in salty environments, while haloduric organisms can survive but do not prefer salty conditions.
  • Piezophiles are microbes that can survive in high atmospheric pressure environments exceeding 14.7 psi.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

More Like This

Microbial Growth and Temperature
15 questions

Microbial Growth and Temperature

MeritoriousDysprosium8596 avatar
MeritoriousDysprosium8596
Use Quizgecko on...
Browser
Browser