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.
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
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

dna structure

QuestionAnswer
Name the four bases Adenine, guanine, cytosine, thymine
Name the purines Adenine, guanine
Name the pyrimidines Cytosine, thymine
What type of bond joins the sugar and the phosphate? Phosphodiester
What type of bond joins the bases? Hydrogen
Name the pentose sugar Deoxyribose
Who described the structure of DNA Watson and Crick
What is the shape of the DNA molecule Double Helix
Adenine pairs with... Thymine
Guanine pairs with Cytosine
What are the monomers of DNA? Nucleotides
How many Hydrogen bonds are there between A and T? Two
How many Hydrogen bonds are there between G and C? Three
Created by: carolannaston