Question

Light-driven electron transport in the chloroplast pumps $H^{+}$

• A. into the stroma
• B. into the inter membrane space between the two layers of the chloroplast envelope
• C. into the thylakoid space
• D. from NADPH to $C{O}_2$

Answer 1

The correct option is C into the thylakoid space

Light-driven electron transport in the chloroplast pumps H+ into the photosynthetic electron-transfer reactions (also called the “light reactions”), energy derived from sunlight energizes an electron in the green organic pigment chlorophyll, enabling the electron to move along an electron-transport chain in the thylakoid membrane. This is quite analogous to the process that occurs in the mitochondrion in which an electron transport chain pumps H+ in the inner membrane space of mitochondria.

So, the correct option is 'into the thylakoid space'.