Podcast
Questions and Answers
What type of microbe requires organic carbon for its growth?
What type of microbe requires organic carbon for its growth?
- Autotroph
- Chemotroph
- Phototroph
- Heterotroph (correct)
Which solution would cause a cell to shrink as water diffuses out?
Which solution would cause a cell to shrink as water diffuses out?
- Isotonic solution
- Hypotonic solution
- Hypertonic solution (correct)
- Buffered solution
What is the optimum temperature range for psychrotrophs?
What is the optimum temperature range for psychrotrophs?
- Between 20°C and 37°C
- Above 30°C
- Below 0°C
- Between 15°C and 30°C (correct)
Which microbe type obtains energy from photosynthesis?
Which microbe type obtains energy from photosynthesis?
What is the maximum temperature in relation to microbial growth?
What is the maximum temperature in relation to microbial growth?
Flashcards
Heterotroph
Heterotroph
A microbe that needs to obtain its carbon from organic sources, like sugars or proteins.
Autotroph
Autotroph
A microbe that uses inorganic CO2 as its sole carbon source. It can make its own food from CO2.
Hypotonic Solution
Hypotonic Solution
A solution where the concentration of solutes is lower outside the cell than inside. Water moves into the cell.
Hypertonic Solution
Hypertonic Solution
Signup and view all the flashcards
Psychrophile
Psychrophile
Signup and view all the flashcards
Study Notes
Carbon Source
- Heterotrophs: microbes that get carbon from organic sources
- Autotrophs: microbes that use inorganic COâ‚‚ as their carbon source
Energy (ATP) Source
- Phototrophs: microbes that produce energy through photosynthesis
- Chemotrophs: microbes that get energy from chemical compounds
Passive Transport
- Passive transport: doesn't use energy
Solutions
- Hypotonic solution: water moves into the cell, causing it to swell. The cell wall usually prevents bursting.
- Hypertonic solution: water moves out of the cell, causing it to shrink.
Temperature for Microbial Growth
- Minimum temperature: lowest temp where microbial growth and metabolism occur
- Maximum temperature: highest temp where microbial growth and metabolism occur
- Optimum temperature: best temperature for fastest rate of growth and metabolism, below 15°C for psychrophiles.
Types of Microbes Based on Temperature Preferences
- Psychrophiles: cold-loving microbes; optimum temp below 15°C; can't grow above 20°C
- Psychrotrophs: optimum temp between 15°C and 30°C; grow in refrigerator temps and cause foodborne illness
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your knowledge on microbial types, energy sources, and transport mechanisms. This quiz covers essential concepts regarding heterotrophs, autotrophs, and temperature preferences for microbial growth. Understand the impact of solutions on cells and the characteristics of psychrophiles.
