LI-P and LD-P

1. 1. Which color of light is least effective for photosynthesis?

• A. Blue

• B. Red

• C. Green

• D. Violet

Answer explanation

Violet has only 400 nm (low-energy wavelength) than other light energies.

2. 2. What is the primary pigment responsible for capturing light in photosynthesis?

• A. Carotenoids

• B. Chlorophyll A

• C. Xanthophyll

• D. Phycobilins

2. 3. Which part of the electromagnetic spectrum do plants primarily use for photosynthesis?

• A. Ultraviolet (UV) and infrared (IR)

• B. Visible light (400-700 nm)

• C. X-rays and gamma rays

• D. Microwaves and radio waves

2. 4. Why do marine plants appear brown, red, or green instead of just green like terrestrial plants?

• A. They lack chlorophyll

• B. Water reflects all colors except green

• C. They only absorb red light

• D. They use different pigments to absorb deeper-penetrating wavelengths

2. 5. Where do the light-dependent reactions occur in plant cells?

• A. Stroma

• B. Cytoplasm

• C. Thylakoid membrane

• D. Mitochondria

2. 6. What is the primary purpose of the light-dependent reactions?

• A. To generate ATP and NADPH for the Calvin cycle

• B. To produce glucose

• C. To release carbon dioxide

• D. To regulate global carbon uptake

2. 7. What molecule is split during the light-dependent reactions to release oxygen?

• A. Carbon dioxide

• B. Water

• C. Glucose

• D. ATP

2. 8. Which enzyme is responsible for producing ATP during the light-dependent reactions?

• A. RuBisCO

• B. ATP synthase

• C. NADP Reductase

• D. Cytochrome C

2. 9. What is the final electron acceptor in the light-dependent reactions?

• A. ATP

• B. NADP+

• C. Oxygen

• D. Water

2. 10. What happens when light excites electrons in Photosystem II?

• A. Electrons are released into the stroma

• B. Electrons combine with glucose to form ATP

• C. Electrons move through the electron transport chain, creating a proton gradient

• D. Electrons exit the chloroplast