NEET 2016 · Class 11

Photosynthesis in Higher Plants

In a chloroplast the highest number of protons are found in

  1. (A)intermembrane space
  2. (B)antennae complex
  3. (C)stroma
  4. (D)lumen of thylakoids

The NCERT line that answers it

Verbatim line

Since splitting of the water molecule takes place on the inner side of the membrane, the protons or hydrogen ions that are produced by the splitting of water accumulate within the lumen of the thylakoids.

Chapter
Photosynthesis in Higher Plants
Section
11.6 THE ELECTRON TRANSPORT

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states that protons accumulate within the lumen of the thylakoids, which directly answers the question about where the highest number of protons are found in a chloroplast.

We did this for 1,565 questions.

Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

Take the free 5-minute checkMore from this chapter

Question text is reproduced from the published NEET 2016 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.