Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

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.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
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

Chapter 8

The Genetics of Bacteria and Their Viruses

What are some of the advantages of Bacteria and Viruses? 1. small, reproduce quickly, creates large populations 2. can be grown on culture media 3. simple structures and physiology 4. Genetic Variability is easy to detect
What do the nucleotide sequences of the genome provide about detailed information? genetic control of metabolism in diverse microbial species and about their evolutionary relationships
Why is the Tobacco Mosaic Virus not associated with living systems? 1. does not reproduce 2. does not develop 3. does not utilize energy 4. no response to environmental stimuli
What are bacteriophages? viruses that infect bacteria
What is a plaque? "hole" in a lawn of bacteria
Two types of Bacteriophages? Virulent and Temperant
Bacteriophage T4 large virus that stores its DNA in a capsule made of protein
Important components of the virus tail? - central hallow core= phage DNA injects to bacterium - tail sheath= pushes tail core through bacteria cell wall -six tail fibers= locate receptors on the host cell -tail pins= attack to receptors
Bacteriophage lambda smaller than T4 but life is more complex
What two pathways could circular alpha chromosome proceed? 1. lytic pathway= reproduces and encodes enzymes that lyse the host cell, just like phage T4. 2. lysogenic= it is inserted into the chromosome of the host bacterium and thereafter is replicated along with that chromosome.
Episomes are similar to plasmids, but episomes can replicate either autonomously or as part of the main chromosome—in an integrated state like the λ prophage.
What happens if bacteria is grown on semisolid medium? each bacterium will divide and grow exponentially, producing a visible colony on the surface of the medium.
True or False : any mutation that slows the growth rate of the bacterium will produce small or petite colonies. True
What are three distinct parasexual processes that occur in bacteria? 1. Transformation 2. Conjugation 3. Transduction
Transformation involves the uptake of free DNA molecules released from one bacterium (the donor cell) by another bacterium (the recipient cell).
Conjugation involves the direct transfer of DNA from a donor cell to a recipient cell
Transduction involves the transfer of genes from a donor bacterial cell to a recipient cell through the help of a bacteriophage
What are the two simple criterias that can distinguish parasexual processes? 1. Is the process sensitive to deoxyribonuclease (DNase), an enzyme that degrades DNA? 2. Does the process require cell contact?
two phenotypic characteristics of importance in Griffith’s demonstration of transformation 1. the presence or absence of a polysaccharide (complex sugar polymer) capsule surrounding the bacterial cells 2. the type of capsule—that is, the specific molecular composition of the polysaccharides present in the capsule
Created by: savepeople
Popular Genetics sets




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:
restart all cards