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.
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

DNA Practice Qs

Biology Honors 1

What stores information in a cell? d. DNA
What happens when a piece of DNA is missing? c. Genetic Information is lost
Because of base pairing in DNA, the percentage of b.thymine molecules in DNA is about equal to the percentage of adenine molecules
The percentages of guanine bases in chicken DNA should be around c. 21.5%
What structural problem prevents adenine from pairing with guanine? d. the bases are both long
Which of the following statements correctly describes Chargaff’s contribution to the study of DNA? c.Chargaff showed that adenine and thymine were found in equal percentages in DNA, but he did not know this was because of base-pairing.
In the Hershey-Chase experiment, what happened to the bacteria that had been infected by viruses that had radioactive DNA, and to the bacteria that had been infected with viruses that had been marked with radioactive proteins? a.The bacteria infected with viruses that had radioactive DNA had become radioactive. The bacteria that had been infected with viruses marked with radioactive proteins were not radioactive.
The table in Figure 12–4 shows the percentages of bases in a DNA sample. How much Thymine should you expect to find in the sample? a. 22%
Which of the following forms a base pair with thymine? b.adenine
During DNA replication, a DNA strand that has the bases CTAGGT produces a strand with the bases b.GATCCA.
RNA contains the sugar a.ribose.
Unlike DNA, RNA contains b.uracil.
Created by: Patricia13