Save
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

cbag lec 5

QuestionAnswer
What is the role of autotrophs in the carbon cycle? They convert CO₂ and H₂O into glucose and oxygen via photosynthesis.
What is the general equation for photosynthesis? 6CO 2 +6H 2 O→C 6H12 O 6 +6O 2 ​
What is the role of heterotrophs in the carbon cycle? They oxidize glucose to release energy, producing CO₂ and H₂O.
What is the equation for cellular respiration? C 6 H 12 O 6​ +6O 2→6CO 2​+6H 2 O
What is oxidation? Loss of electrons (or hydrogen atoms).
What is reduction? Gain of electrons (or hydrogen atoms).
What type of enzymes facilitate these reactions? Dehydrogenases, using cofactors like NAD⁺ and NADP⁺.
What are thylakoids? Membrane sacs containing light-harvesting complexes for photosynthesis.
What is the stroma? The fluid surrounding the thylakoids where the Calvin cycle occurs.
Who discovered that plants improve air quality? Joseph Priestley (1771).
Who showed that light is essential for photosynthesis? Jan Ingenhousz (1779)
Who confirmed that oxygen comes from water, not CO₂? Robert Hill (1939).
Who demonstrated that photosynthesis occurs in two stages? Emerson & Arnold (1930s).
What are the primary pigments for photosynthesis? Chlorophyll a & b (green).
What are carotenoids? Accessory pigments (orange/yellow) that protect plants from excess light.
What happens in Photosystem II (PSII)? Splits water (H₂O), releasing O₂ and electrons.
What happens in Photosystem I (PSI)? Reduces NADP⁺ to NADPH for the Calvin cycle.
What does ATP Synthase do? Produces ATP using the proton gradient across the thylakoid membrane.
What are the three main phases of the Calvin Cycle? Carboxylation: CO₂ is fixed by RuBP & RUBISCO → forms 3-PG. Reduction: 3-PG is converted to G3P using ATP & NADPH. Regeneration: G3P regenerates RuBP to continue the cycle.
What is photorespiration? A wasteful process where RUBISCO binds O₂ instead of CO₂, reducing efficiency.
What are two adaptations that reduce photorespiration? C4 Metabolism: Separates CO₂ fixation from O₂ production (e.g., corn, sugarcane). CAM Metabolism: Fixes CO₂ at night to avoid photorespiration during the day (e.g., cacti).
Why is understanding photorespiration important? It helps scientists engineer crops for better photosynthetic efficiency and higher yields.
Created by: REDZ17
Popular Biology sets

 



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