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

proficiency quiz 2

biology

TermDefinition
cell theory 1. all organisms are made of 1 or more cells 2. cells are the building blocks of life 3. all cells come from existing cells
do hydrophobic substances have even or uneven sharing of elections? even, meaning they are nonpolar
What 3 things do all prokaryotic and eukaryotic cells have in common? 1. plasma membrane 2. chromosomes 3. ribosomes
do hydrophilic substances have even or uneven sharing of electrons? uneven meaning they are polar
what is the plasma membrane? the plasma membrane forms a boundary between the cell and it's surroundings
what is the general function of the phospholipid bilayer? It controls the molecules that enter and leave the cell
describe the head of a phospholipid hydrophilic meaning they are polar,the heads are negatively charged because of the phosphate groups
describe the tails of a phospholipid hydrophobic meaning they are nonpolar. They are also fatty acids
nonpolar even sharing of electrons, creating no charge. A neutral molecule.
polar uneven sharing of electrons creating a partial charge
what is the main difference between prokaryotes and eukaryotes? Eukaryotes have a nucleus and prokaryotes do not.
how does the significance of the chemical properties of the heads and tails have relations to how the structure of the bilayer functions? non polar molecules can get through the bilayer, because they do not have a charge.small polar molecules can also get through the bilayer because of their size, But any large polar molecule has to go through a channel protein.
What is one specific job the phospholipid bilayer does? allowing certain molecules to pass through the bilayer. nonpolar and small polar molecules can pass through the the hydrophobic interior. Other large polar molecules can't pass through the interior but they can travel through the integral proteins
what is another specific job the phospholipid bilayer does? the carbohydrates on the bilayer (chains of sugar) are used as identification that tells the cells which cells need to go where and identifies foreign cells that need to leave.
Created by: cosettegiroux