NEET UG 2020 · Chemistry · Question 122
NEET 2020 Chemistry, question 122
Question 122 of the NEET 2020 paper (code E1) is a Chemistry question from The s-Block Elements. Its idea, Biological Role of Sodium and Potassium, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 4.
Updated 2026-10-08
Q122 · Chemistry
The following metal ion activates many enzymes, participates in the oxidation of glucose to produce ATP and with Na, is responsible for the transmission of nerve signals.
- 1Iron
- 2Copper
- 3Calcium
- 4PotassiumOfficial answer
Official answer: option 4 · NTA final answer key
Same idea
The only question on Biological Role of Sodium and Potassium
No other NEET paper from 2017–2026 tested this exact idea.
Biological Role of Sodium and Potassium: every question and how it was framed
The chapter
The s-Block Elements in ten years of NEET
12 questions from 2017–2026, asked in 7 of 10 papers, about 1.1 a paper. s-Block Elements alone had 6.