Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Bacteriology
| Question | Answer |
|---|---|
| What does a bacterial cell membrane lack? | Sterols such as cholesterol |
| What are the functions of the bacterial capsule? | -Protection from dessication - Promoting virulence - Source of nutrition in starvation |
| What are the possible functions of the mesosomes? | -Compartmentalisation of DNA -Increase surface area for respiratory enzymes |
| What class of flagella are the fastest? | Monotrichous |
| What class of flagella are uniformly distributed across the cell? | Peritrichous |
| What are the functions of pili? | -conjugation -attachment sites for bacteriophage -attachment to other bacteria (biofilms) |
| What is the main component of the bacterial cell wall? | Peptidoglycan |
| What class of bacteria have a lipopolysaccharide layer? | Gram negative |
| How do we classify/test the difference in chemical complexity of the bacterial cell wall? | Gram staining |
| What is the primary stain in a gram stain? | Crystal violet |
| What is the mordant in the gram stain? | Iodine |
| What is the decolouriser in the gram stain? | Acetone |
| What is the counter stain in the gram stain? | Safranin |
| What are the three growth factors that bacteria need? | -Vitamins -Amino acids -Purines/Pyrmidines |
| What are autotrophs? | Use CO2 as their main source of carbon |
| What are heterotrophs? | Take in nutrients in preformed states |
| What are phototrophs? | Use light as their main source of energy |
| What are chemotrophs? | Gain energy by he oxidation of chemical compounds |
| What are psychrophile? (Give example of temp range) | Optimum temperature at the lower end of the temp scale and generally below 20 Celsius |
| What are mesohpiles? (Include temperature range) | These have similar ptimum temperatures to human cell and grow over a range of about 20-45 Celsius |
| What's classification of temperature must human pathogens be? | Mesophiles |
| What are Thermophiles? (Include temp range) | Thermophiles have an optimum temperature in the higher end of the temperature scale and have a range that is greater than 45 Celsius |
| What are obligate aerobes? | Must have oxygen present to grow |
| What are obligate anaerobes? | Must not have oxygen present to grow |
| What are facultative anaerobes? | Can grow with or without oxygen, but prefer its presence |
| What are aerotolerant bacteria? | Can grow equally well with or without oxygen present |
| What are microaerophiles? | Must have very low concentrations of oxygen (2-10%) |
| What are osmotolerant bacteria? | Can grow over a wide range of water activity/solute concentration |
| What are halophiles? | Require a high concentration of NaCl to grow |
| If conditions are favourable for bacterial growth, does sporulation take place? | No |
| In conjugation, what does the donor bacterium contain that the conjugating one does not? | F plasmid |
Created by:
Jake_Bark
Popular Biology sets