Photosynthesis

Question 1

Photosynthesis

Accepted Answer

Process in which light energy is converted to chemical energy in carbohydrates.

Question 2

Photosynthesis takes place in...

Accepted Answer

Chloroplasts of plant cells (primarily mesophyll cells).

Question 3

Main Equation

Accepted Answer

6 CO₂ + 6 H₂O + light → C₆H₁₂O₆ + 6 O₂.

Question 4

Thylakoids

Accepted Answer

Membrane sacs containing chlorophyll and light-reaction components.

Question 5

Stroma

Accepted Answer

Fluid inside chloroplast where Calvin Cycle occurs.

Question 6

Light-Dependent Reactions

Accepted Answer

Occur in thylakoid membranes; produce ATP and NADPH from light.

Question 7

Light-Independent Reactions (Calvin Cycle)

Accepted Answer

Occur in stroma; use ATP and NADPH to fix CO₂ into G3P.

Question 8

Chlorophyll

Accepted Answer

Main pigment absorbing blue and red light for photosynthesis.

Question 9

Accessory Pigments

Accepted Answer

Carotenoids and others that expand light absorption range.

Question 10

Photosystem II (PSII)

Accepted Answer

Captures light, splits water (photolysis), and provides electrons to ETC.

Question 11

Photosystem I (PSI)

Accepted Answer

Re-energizes electrons to reduce NADP⁺ → NADPH.

Question 12

Photolysis of Water

Accepted Answer

Splitting of H₂O into O₂, electrons, and protons in PSII.

Question 13

ATP Synthase in Chloroplasts

Accepted Answer

Uses proton gradient from ETC to make ATP.

Question 14

RuBisCO

Accepted Answer

Enzyme that fixes CO₂ to RuBP in Calvin Cycle.

Question 15

RuBP (Ribulose Bisphosphate)

Accepted Answer

5-carbon compound that binds CO₂ to begin carbon fixation.

Question 16

G3P (Glyceraldehyde-3-Phosphate)

Accepted Answer

3-carbon product of Calvin Cycle used to form glucose.

Question 17

C3 Plants

Accepted Answer

Use Calvin Cycle directly for carbon fixation.

Question 18

C4 Plants

Accepted Answer

Fix CO₂ into 4C malate in mesophyll cells → transfer to bundle sheath for Calvin Cycle.

Question 19

CAM Plants

Accepted Answer

Fix CO₂ at night when stomata open; store as organic acids for daytime Calvin Cycle.

Question 20

Stomata

Accepted Answer

Leaf pores for gas exchange; open for CO₂ intake and O₂ release.

Question 21

Photorespiration

Accepted Answer

Wasteful process when RuBisCO binds O₂ instead of CO₂ in C3 plants.

Alle Karten