NEET UG · Chemistry · Biomolecules

Biomolecules (Chemistry): NEET previous year questions

14 questions in ten years of NEET, in 10 of 10 papers. Pattern: Every year. Here is how it is asked and which ideas come back.

Asked in 10 years: 14; about 1.4 per paper
Years asked: 10/10; last asked 2026
Chance of a question next paper: 84%; historical rate, how we compute it
Weighted estimate: 1.5; model; history: 1.4 a paper on average, typically 1–2

Key findings

01
Asked in 10 of 10 papers, 14 questions in all: #42 of 204 topics by ten-year total.
02
77% of its questions since 2018 tested an idea never asked before; 2 repeated an idea from the year before.
03
The most repeated idea is Classification of Amino Acids, asked 3 times (2018, 2019, 2020), usually as “identify example of zwitterion-forming compound”.
04
NEET has asked 0 of the 12 ideas in this topic; 0 have never been asked, directly or indirectly.
05
Mostly asked as one-line MCQ (71%); 71% easy, 0% hard, and up from 1.3 to 1.6 questions a paper since 2024.

Questions per year

Up to 2023: 1.3; per paper
Since 2024: 1.6; +0.4
Usual gap: 1.0 yrs; between papers asking it
Swing: ±0.5; questions, year to year

Recent framings

true statement selection on protein structure
match list on vitamins and sources
match list on vitamins and deficiency diseases

Revise first

Vitamin Deficiency Diseases (2021 2025); Levels of Protein Structure (2026); Dietary Sources of Vitamins (2026)

How it is asked

Difficulty, format and skill

Across all 14 questions on Biomolecules (Chemistry) since 2017.

Difficulty

QUESTIONS

104

Easy10 · 71%
Medium4 · 29%
Hard0 · 0%

Format

One-line MCQ · 10 Q71%
Match the lists · 2 Q14%
Other · 1 Q7%
Two statements · 1 Q7%

Skill tested

Recall · 14 Q100%

Repeats

New idea, or one asked before?

Each column is a paper. Blue questions tested an idea NEET had not asked before; navy ones went back to an idea from an earlier paper. 2017 is the first paper, so everything in it counts as new.

’17’18’19’20’21’22’23’24’25’26

Idea asked for the first time
Idea asked in an earlier paper

Coverage of the topic

NEET has asked 0 of the 12 ideas in this topic. 0 have never been asked yet.

Asked directly0 · 0%
Touched inside another question12 · 100%
Never asked0 · 0%

Ideas come from Lumi’s syllabus map of NCERT. A never-asked idea is not a safe skip: most new questions come from exactly these.

Drill down

Idea, year, question

Every idea NEET tested in this topic, with its ten papers. Open one to read the questions.

ideaAskedShareYears’17’18’19’20’21’22’23’24’25’26

Repeated3 · 21%21%3/10
- 2020 · Q117
  Which of the following is a basic amino acid ?
  easyOne-line MCQAsked the year before
- 2019 · Q64
  The non-essential amino acid among the following is :
  easyOne-line MCQAsked the year before
- 2018 · Q53
  Which of the following compounds can form a zwitterion ?
  easyOne-line MCQNew idea
Repeated2 · 14%14%2/10
1 · 7%7%1/10
1 · 7%7%1/10
1 · 7%7%1/10
1 · 7%7%1/10
1 · 7%7%1/10
1 · 7%7%1/10
1 · 7%7%1/10
1 · 7%7%1/10
1 · 7%7%1/10

Squares are the ten papers, 2017 to 2026; darker means more questions. Share is of the level above.

Ideas

Every idea inside this topic

11 different ideas were tested; 2 came more than once.

Classification of Amino Acids3×
identify example of zwitterion-forming compound
One-line MCQ · 6% next
Vitamin Deficiency Diseases2×
identify deficiency disease of vitamin
Match the lists · 6% next
Dietary Sources of Vitamins1×
match list on vitamins and sources
Match the lists · 6% next
Levels of Protein Structure1×
true statement selection on protein structure
One-line MCQ · 6% next
Monosaccharide Structure and Anomers1×
identify compound from properties
One-line MCQ · 6% next
Reactions of Open-Chain Glucose1×
identify compound giving test
Other · 6% next
Nucleosides and Nucleotides1×
statement i/ii on nucleic acid units
Two statements · 4% next
Enzymes as Biocatalysts1×
identify incorrect statement on enzymes
One-line MCQ · 4% next
Disaccharides and Invert Sugar1×
identify product of hydrolysis
One-line MCQ · 4% next
Polysaccharides: Starch, Cellulose and Glycogen1×
true statement selection on polysaccharides
One-line MCQ · 4% next
Protein Functions and Denaturation1×
incorrect statement selection on biomolecules
One-line MCQ · 4% next

Idea	Times	Format	Chance next	Foundation for
Classification of Amino Acidsidentify example of zwitterion-forming compound	3	One-line MCQRecall	6%	–
Vitamin Deficiency Diseasesidentify deficiency disease of vitamin	2	Match the listsRecall	6%	–
Dietary Sources of Vitaminsmatch list on vitamins and sources	1	Match the listsRecall	6%	–
Levels of Protein Structuretrue statement selection on protein structure	1	One-line MCQRecall	6%	–
Monosaccharide Structure and Anomersidentify compound from properties	1	One-line MCQRecall	6%	–
Reactions of Open-Chain Glucoseidentify compound giving test	1	OtherRecall	6%	–
Nucleosides and Nucleotidesstatement i/ii on nucleic acid units	1	Two statementsRecall	4%	–
Enzymes as Biocatalystsidentify incorrect statement on enzymes	1	One-line MCQRecall	4%	–
Disaccharides and Invert Sugaridentify product of hydrolysis	1	One-line MCQRecall	4%	–
Polysaccharides: Starch, Cellulose and Glycogentrue statement selection on polysaccharides	1	One-line MCQRecall	4%	–
Protein Functions and Denaturationincorrect statement selection on biomolecules	1	One-line MCQRecall	4%	–

Chance next is the historical rate at which an idea with this record came back in the following paper. It is low for every idea, which is why learning the topic beats memorising past questions. All repeated ideas

Every question

Biomolecules (Chemistry) questions, year by year

The opening words of each question as it appeared in the official paper, with the idea it tested.

NEET 20262 questions

Q50
The correct statement about peptides and proteins is
Idea: Levels of Protein Structure
New ideaMediumOne-line MCQ
Q80
Match the vitamins in List-I with their sources in List-II. List-I | List-II A. vitamin A | I. meat B. vitamin $\mathrm{B_{12}}$ | II.…
Idea: Dietary Sources of Vitamins
New ideaEasyMatch the lists

NEET 20252 questions

Q69
Match List I with List II. List I (Name of Vitamin) | List II (Deficiency disease) A. Vitamin $B_{12}$ | I. Cheilosis B. Vitamin D | II.…
Idea: Vitamin Deficiency Diseases
EasyMatch the lists
Q82
Sugar 'X' A. is found in honey. B. is a keto sugar. C. exists in α and β - anomeric forms. D. is laevorotatory. 'X' is :
Idea: Monosaccharide Structure and Anomers
New ideaMediumOne-line MCQ

NEET 20241 question

Q68
The reagents with which glucose does not react to give the corresponding tests/products are A. Tollen's reagent B. Schiff's reagent C. HCN…
Idea: Reactions of Open-Chain Glucose
New ideaMediumOther

NEET 20231 question

Q58
Given below are two statements : Statement I : A unit formed by the attachment of a base to 1' position of sugar is known as nucleoside…
Idea: Nucleosides and Nucleotides
New ideaMediumTwo statements

NEET 20221 question

Q52
The incorrect statement regarding enzymes is :
Idea: Enzymes as Biocatalysts
New ideaEasyOne-line MCQ

NEET 20211 question

Q79
The RBC deficiency is deficiency disease of :
Idea: Vitamin Deficiency Diseases
New ideaEasyOne-line MCQ

NEET 20202 questions

Q117
Which of the following is a basic amino acid ?
Idea: Classification of Amino Acids
Asked last yearEasyOne-line MCQ
Q121
Sucrose on hydrolysis gives :
Idea: Disaccharides and Invert Sugar
New ideaEasyOne-line MCQ

NEET 20191 question

Q64
The non-essential amino acid among the following is :
Idea: Classification of Amino Acids
Asked last yearEasyOne-line MCQ

NEET 20182 questions

Q53
Which of the following compounds can form a zwitterion ?
Idea: Classification of Amino Acids
New ideaEasyOne-line MCQ
Q56
The difference between amylose and amylopectin is
Idea: Polysaccharides: Starch, Cellulose and Glycogen
New ideaEasyOne-line MCQ

NEET 20171 question

Q74
Which of the following statements is not correct ?
Idea: Protein Functions and Denaturation
EasyOne-line MCQ

Questions from the official NEET UG papers published by NTA (CBSE before 2019). Topic and idea tags, counts and notes are Lumi’s.