Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Unit4:Topics 4&5

TermDefinition
Activation Energy The amount of energy that reactants must absorb before a chemical reaction will start.
Active Site The specific region of an enzyme that binds the substrate and where the reaction occurs.
Catalyst A chemical agent that speeds up a reaction without being consumed by the reaction.
Denaturation The process by which an enzyme permanently loses its specific 3D shape and ability to function.
Enzymes Specialized proteins that act as biological catalysts.
Products The new molecule(s) that are produced as a result of the enzyme's action.
Reactants (Substrate) The molecule(s) that start the reaction; the enzyme acts specifically on its substrate.
Substrate The specific reactant molecule that an enzyme acts on.
Overcoming the Barrier Every reaction requires "startup energy" called activation energy; enzymes work by lowering this barrier so reactions can happen faster.
Structural Specificity An enzyme's function is determined by its 3D shape, which creates a specific "active site" that only fits a particular substrate.
The Induced Fit When a substrate binds, the enzyme undergoes a slight shape change to "hug" the substrate more tightly, facilitating the reaction.
Biological Recycling Enzymes are catalysts, meaning they are not consumed or changed by the reaction and can be used over and over again.
Sensitivity to Environment Because enzymes are proteins, extreme heat or changes in pH can cause them to denature (unfold), making them lose their shape and function.
Autotroph An organism that produces its own food (organic molecules) using light or chemical energy.
Calvin Cycle The second stage of photosynthesis that uses ATP and NADPH to convert CO2 into sugar.
Chlorophyll The primary light-absorbing pigment in plants that reflects green light and absorbs blue/red light.
Chloroplast The specialized organelle (plastid) where photosynthesis takes place in eukaryotic cells.
Light-Dependent Reactions The initial stage of photosynthesis that captures solar energy to produce ATP and NADPH.
Stroma The fluid-filled space surrounding the thylakoids where the Calvin Cycle occurs.
Thylakoid Flattened sac-like membranes inside the chloroplast where the light-capturing reactions occur.
Solar Transformation Photosynthesis is an endergonic process that converts kinetic light energy into potential chemical energy stored in the bonds of sugar.
The Power of Pigments Chlorophyll molecules located in the thylakoid membranes absorb specific wavelengths of light to excite electrons, initiating the energy capture.
Water as a Donor Water molecules are split during the light-dependent reactions to provide electrons, releasing Oxygen (O2) gas as a critical byproduct for aerobic life.
Carbon Fixation In the Calvin Cycle, inorganic Carbon Dioxide (CO2) is "fixed" into organic molecules, eventually forming the high-energy sugar, glucose (C6H12O6 + 6O2)
Compartmentalization Photosynthesis is divided into two stages: the Light-Dependent Reactions (occurring in the thylakoids) and the Calvin Cycle (occurring in the stroma).
Created by: user-2016084
 

 



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