Question

Photosynthesis involves a series of reactions. The light-dependent reactions occur in the presence of light while the light-independent reactions can occur in the light or dark.
Which of the following are common to only the light-dependent reactions?

• A. Glucose, oxygen, stroma
• B. Thylakoid membrane, NADPH, ATP
• C. Carbon dioxide, water, glucose
• D. Sunlight, thylakoid membrane, NADH

Answer 1

Answer: (B)

Thylakoid membrane, NADPH, ATP

The light-dependent reactions occur on the thylakoid membrane embedded with specialized integral protein complexes or photosystems, which work together and give ATP, NADPH and oxygen molecule. The pigments present in the photosystems absorb photon of light. The photons excite electrons in the chlorophyll which then move through the electron transport chain and causes NADP- to combine with H+ forming NADPH. Cytochrome b6f and ATP synthase together create ATP.

Thus, the correct answer is 'Thylakoid membrane, NADPH, ATP'.