Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

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

MOLB Chapter 6

Microbial Growth

Carbon heterotrophs/autotrophs are carbon fixing
Nitrogen need for amino acids and nucleic acids, by breaking down amino acids from the environment(ammonia, nitrate)
Sulfur protein, vitamins, break down amino acids, absorb sulfate/hydrogen sulfur from the environment
Phosphorus nucleic acids, membranes, ATP, absorb phosphate groups
optimal pH for bacteria 6.5-7.5
optimal pH for mold/yeast 5-6
Complex media have an unknown concentration of nutrients
Defined media know the exact concentration of nutrients
Differential Media media that allow identifiable reactions MSA agar
Selective Media suppress the growth of unwanted organisms while promoting growth of desired organism, EMB
Enrichment media used to increase small amounts of an organism to a detectable level, phenol added to media
Agar used as a solidifying agent for culture media, generally not metabolized by microbes, liquefies as 100, solidifies at 40
Lag Phase prepares for population growth, no growth
log phase exponential increase in population
Stationary Phase cell death equals increase in population
Death Phase population decreases at a logrhithmic rate
BSL I no special precautions
BSL II lab coat, gloves, eye protection
BSL III biosafety cabinets to prevent airborne transmission
BSL IV sealed, negative pressure, exhaust air is filtered twice
Created by: 100000860991270