Save
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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
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

CH 337

Final Exam Questions

QuestionAnswer
What governs the distribution of the solutes between the aqueous phase and the organic phase? Their relative solubilities
How can one ascertain whether a layer is the organic phase or the aqueous phase? Add a drop of the mystery layer to 2 mL H2O; if it dissolves, it's aqueous; if not, it's organic
Why must extraction mixtures be vented? Organic solvents are volatile and evaporate quickly, generating pressure inside the separatory funnel
What three advantages are associated with the thin-layer chromatographic technique? 1) very small sample quantities are required, 2) great ease and rapidity with which experiment's performed, 3) good resolution's often obtained
What two limitations are associated with gas-liquid chromatography? 1) analysis is limited to small amounts of sample, 2) samples must consist of reasonably volatile compounds
What are the six basic parts of a gas-liquid chromatograph? 1) source of high-pressure pure carrier gas (e.g., helium or nitrogen), 2) gas flow controller, 3) heated injection port, 4) column and column oven, 5) detector, 6) recording device or data station
What three pieces of information are provided in the data table of a gas chromatogram? 1) peak retention times, 2) peak areas, 3) percent compositions
What must be available in order for GC analysis to permit compound identification? Authentic samples of the various components in the mixture being analyzed
What are the six items that must be determined in order to establish the sequence of a peptide (or protein)? 1) cleave all disulfide bridges and alkylate resulting thiol groups, 2) determine constituent amino acids, 3) identify N-terminal aa, 4) identify C-terminal aa, 5) fragmentation through partial hydrolysis, 6) identify locations of any disulfide bridges
What conditions are employed to "completely" hydrolyze a peptide? Digest peptide in 6 M HCl at 100 degrees C for 24 hours
An enzyme that catalyzes the hydrolysis of a peptide bond at the end of the peptide chain is called? Exopeptidase
Created by: knye
 

 



Voices

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:
Retries:
restart all cards