Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Microbe growth

QuestionAnswer
Name the two substance needed to be added to growth media to allow microbes to grow. 1. energy source 2. raw materials
Give an example of an energy source 1. carbohydrate/sugar 2. light (some)
Give an example of a raw material fatty acids amino acids vitamins
Describe why amino acids are needed by microbes For protein synthesis
Explain why some microbes do not need raw materials to be added to their growth media They make their own raw materials.
State the domains of life microbes are found in all three; 1. bacteria 2. archea 3. eukaryotes
Give one advantage of culturing microbial cells over mammalian cells. 1. ease of cultivation 2. speed of growth 3. adaptability
Comment on the range of substrates a microbe can use and range of products it can make. Wide range of substrates used and produces a wide range of products
Name the 4 phases of microbe growth Lag, log, stationary, death
Describe what happens in the lag phase Enzymes are being induced to metabolise substrates
Describe what happens during the log phase Rapid growth due to plentiful nutrients
Describe what happens during the stationary phase Growth slows as nutrients are running out
Describe what happens during the death phase Microbes dying as nutrients have ran out
In what stage are secondary metabolites like antibiotics made Stationary phase
Explain how secondary metabolites confer an ecological advantage to microbes in the stationary phase Outcompete other microbes for nutrients
What is measuring in a total cell count Living (viable) and dead cells
What is measuring in a viable cell count Only living cell
From a graph how can it be determined if this is a viable cell count It will have a death phase
Name the 4 environmental conditions that need to be controlled when culturing microbes 1. sterility 2. temperature 3. oxygen concentration 4. pH
Describe how pH can be controlled buffers
Describe how temperature can be controlled in a fermenter thermostat OR water jacket
Describe how sterility can be controlled in a fermenter air filter or steam cleaning between use
Describe how oxygen concentration can be controlled in a fermeter air inlet and paddles for aeration
Explain why temperature/pH must be controlled To keep enzymes at optimum activity.
Explain why oxygen concentrations must be controlled to enable aerobic respiration
Explain why sterile conditions must be maintained To prevent other microbes using up nutrients OR spoiling product
Created by: brightminds
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards