NCERT Handwritten Notes Class 11 Biology Chapter 12 Respiration in Plants

These class 11 biology handwritten notes chapter 12 Respiration in Plants are built for one fast revision pass before Boards, NEET and CUET in 2026-27. All 31 pages carry the pathway, the ATP numbers and the respiratory quotient in clear handwriting, boxed and colour-coded for last-minute recall.

Chapter 12 is a numbers chapter. Most lost marks come from ATP counts students already know.

• Hand-drawn glycolysis ledger and a Krebs cycle wheel with the per-turn yield boxed beside it.
• Boxed definitions for respiration, glycolysis, fermentation and respiratory quotient in exam wording.
• Pairs with the NCERT Solutions, Notes and Exemplar Solutions linked lower on this page.

What Respiration in Plants Handwritten Notes Cover

The 31 pages follow the NCERT order. They open with where a plant gets its energy and close with a night-before recap. Each topic sits on its own page, so students revise one idea at a time. New sub-topics are written in red and every definition is boxed.

• Do plants breathe: stomata and lenticels, and the three reasons plants need no breathing organ.
• Cellular respiration: the C-C bond definition, and why burning glucose is not the same as respiring it.
• Glycolysis: the ten-step EMP pathway in the cytoplasm, with the gross 4 against net 2 ATP split.
• Fermentation: the alcoholic and lactic acid routes, and why both exist only to reoxidise NADH.
• Aerobic respiration: the link reaction, then the Krebs or TCA cycle in the mitochondrial matrix.
• ETS and oxidative phosphorylation: complexes I to V, chemiosmosis, and oxygen as the final hydrogen acceptor.
• Balance sheet and RQ: where the 38 ATP sit, the amphibolic pathway, and RQ values for each substrate.

The shuttle explanation for the 36 against 38 ATP debate is marked as a NEET and CUET extension, since the 2026-27 NCERT print stops at 38.

Key Diagrams and Terms in Respiration in Plants Notes

Marks in this chapter go missing on numbers, not on theory. The summary table below is the block students get wrong most often, because the two ATP conversion rates look interchangeable and are not.

A hand-drawn Krebs wheel runs from oxaloacetic acid through citric acid and back, with the per-turn yield of 3 NADH, 1 FADH₂, 1 GTP and 2 CO₂ boxed beside it. A second sketch lays out complexes I to V in order and marks the point where FADH₂ enters at complex II.

How to Use These Handwritten Notes for Revision

Work through the pages in three short passes. Read a topic page, cover the boxed number and say it back, then answer two NCERT questions on it. This loop fixes the ATP counts faster than re-reading the textbook.

• Say the Krebs yield as 3-1-1-2, then double it, because the cycle turns twice per glucose.
• Learn only two conversion rates: NADH gives 3 ATP and FADH₂ gives 2 ATP.
• Keep the class 11 biology handwritten notes chapter 12 Respiration in Plants open beside the NCERT Solutions while practising.
• Read the common-mistakes page last, on page 29, before you shut the file.

Around 40 minutes is enough for one full pass of this chapter, so the notes fit into the last week before an exam.

Student Feedback on Respiration in Plants Handwritten Notes

Students rate the balance sheet page as the one that saves them the most time. The figures below come from a Collegedunia poll run before the 2026 boards.

• In a Collegedunia survey of 10,860 students, 74% said the 38 ATP breakdown was their most-used revision page.
• Most-repeated slip before the poll: forgetting the Krebs cycle turns twice, made by about 5 in 10 students.

Source: 2026-27 Class 11 Biology student poll. Sample of 10,860 students from CBSE schools across 12 states.

Where to Use These Notes Alongside Other Resources

These handwritten pages work best next to the step-wise Solutions, the summary Notes and the Exemplar Solutions for the same chapter. Read the notes first, then check the answers, and keep the Exemplar for extra practice.

All Class 11 Biology Handwritten Notes by Chapter

The table links the handwritten notes for every Class 11 Biology chapter, so students can move across the course in one click. Respiration in Plants is highlighted.