WJEC A2 Photosynthesis

The light reaction of photosynthesis does not include

• chemiosmosis

• oxygen liberation

• charge separation

• electron transport

The final product of the Calvin cycle is

• RuPB

• PGA

• ATP

• G3P

Photosynthesis takes place in the membranes of small sacs called

• thylakoids

• grana

• photosystems

• photons

The dark reaction in photosynthesis is limited by

• CO₂, temperature, and products of the light reaction

• CO₂, products from the light reaction, and water

• water, temperature, and CO₂

• oxygen, water, and temperature

Colors of light most useful in photosynthesis are

• green, yellow, and orange

• red, violet, and blue

• infrared, red, and yellow

• red, white, and blue

The pigment molecules responsible for photosynthesis are located in the

• mitochondria

• cytoplasm of the cell

• stroma of the chloroplast

• thylakoid membrane of the chloroplast

• all of the above

Both carotenoids and chlorophylls

• are pigments

• absorb photons of all energy ranges

• contain porphyrin rings

• all of the above

• none of the above

During what stage of photosynthesis are ATP and NADPH converted to ADP + Pi and NADP⁺?

• the light-dependent reactions

• the light-independent reactions

• both of the above

• none of the above

Water vapor exits and CO₂ enters a leaf through the

• stomata

• grana

• porphyrin rings

• photons

• stroma

What energy-rich organic compound is produced as a result of the Calvin cycle?

• NADPH

• CO₂

• ATP

• H₂O

• glucose