Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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
Know
remaining cards
Save
0:01
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:
Retries:
restart all cards




share
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

Biology

Chapter 27

QuestionAnswer
peptidoglycan a network of sugar polymers cross-linked by polypeptides
Gram stain used to classify bacteria by cell wall composition
Gram-positive bacteria have simpler walls with a large amount of peptidoglycan
Gram-negative bacteria have less peptidoglycan and an outer membrane that can be toxic
capsule a polysaccharide or protein layer covers many prokaryotes
fimbriae allow them to stick to their substrate or other individuals in a colony
Pili are longer than fimbriae and allow prokaryotes to exchange DNA
taxis the ability to move toward or away from a stimulus
plasmid a small DNA molecule within a cell that is physically separated from a chromosomal DNA and can replicate independently
endospores enable bacteria to lie dormant for extended periods
transformation when a prokaryotic cell can take up and incorporate foreign DNA from the surrounding environment
Transduction movement of genes between bacteria by bacteriophages (viruses that infect bacteria)
F factor piece of DNA required for the production of pili
R plasmids carry genes for antibiotic resistance
Obligate aerobes require O2 for cellular respiration
Obligate anaerobes poisoned by O2 and use fermentation or anaerobic respiration
anaerobic respiration form of respiration using electron acceptors other than oxygen
Facultative anaerobes can survive with or without O2
nitrogen fixation a process in which nitrogen (N 2) in the atmosphere is converted into ammonia (NH 3)
heterocysts photosynthetic cells and nitrogen-fixing cells that exchange metabolic products
biofilms surface-coating colonies that enable metabolic cooperation
extremophiles archaea that live in extreme environments
Extreme halophiles live in highly saline environments
Extreme thermophiles thrive in very hot environments
Methanogens live in swamps and marshes and produce methane as a waste product; strict anaerobes and are poisoned by O2
Mycoplasms the smallest known cells
Created by: danat214