Select the correct statement from the following regarding cell membrane.

(A)Na+ and K+ ions move across cell membrane by passive transport.
(B)Proteins make up 60 to 70% of the cell membrane.
(C)Lipids are arranged in a bilayer with polar heads towards the inner part.
(D)Fluid mosaic model of cell membrane was proposed by Singer and Nicolson.

The NCERT line that answers it

Verbatim line

An improved model of the structure of cell membrane was proposed by Singer and Nicolson (1972) widely accepted as **fluid mosaic model** (Figure 8.4).

Chapter: Cell: The Unit of Life
Section: 8.5.1 Cell Membrane
Page: 9
Words matched: 24 of 24

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 'An improved model of the structure of cell membrane was proposed by Singer and Nicolson (1972) widely accepted as fluid mosaic model', which directly matches the fact in option D.

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 check More from this chapter

Question text is reproduced from the published NEET 2012 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.