MASS
SYSTEM BREAKDON
REDOX REACTIONS
ENERGY FLOW
100

This gas makes up nearly all the solid mass of a tree.

What is Carbon Dioxide (CO)?

100

If PSII is completely blocked, these two products will NOT be made.

What are ATP and NADPH?

100

In photosynthesis this molecule gets oxidized.

What is H2O?

100

Light energy is first converted into this form of energy in the chloroplast's membrane.

What is chemical energy?

200

The carbon(CO2) that makes a tree comes from where?

What is the air?

200

If ATP synthase is inhibited, the light reactions will eventually stop because this molecule can't be recycled.

What is ADP?

200

In photosynthesis, this molecule gets reduced.

What is CO₂?

200

Name the two photosystems where light energy is directly absorbed.

What are Photosystem II (PSII) and Photosystem I (PSI)?

300

Name the specific molecule that plants take from CO₂ that then gets turned into wood, leaves, and roots.

What is carbon?

300

A herbicide blocks electron flow between PSII and PSI. Predict what happens to NADPH production and explain why using the electron flow pathway.

What is: NADPH production stops because electrons from PSII can't reach PSI, PSI needs those electrons to reduce NADP+ to NADPH?

300

Photosynthesis reduces CO₂ to make glucose. Cellular respiration does the opposite - it does this to glucose.

What is oxidizes glucose?

300

These are the two "energy currency" molecules produced by the light reactions.

What are ATP and NADPH?

400

Name the specific enzyme that grabs CO₂ from the air

What is rubisco?

400

The Calvin cycle is blocked but light reactions continue briefly. Explain what eventually causes the light reactions to stop.

What is:The Calvin cycle normally recycles ADP and NADP+, so without it, the light reactions run out of these electron/energy acceptors and shut down?

400

If 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, which atoms in H₂O lose electrons and where do those electrons ultimately end up in the products.

What is:The oxygen in H₂O is oxidized, and those electrons end up on carbon atoms in glucose (forming C-H bonds)?

400

ATP and NADPH made in the light reactions are used as energy to power this cycle.

What is the Calvin cycle?