Most Scoring Units and Chapters in Biology Covering 60% of the NEET Biology Paper

Why Focus on the NEET 2027 Most Scoring Biology Units?

NEET Biology covers 50% of the total exam paper. Around 60% of questions are from only a few units. By focusing on these units, one can study wisely and gain knowledge of the 100 most scoring NEET biology questions that help one to score 330+ marks. These units are good to revise at the last moment. By learning these units,

• One will save time: Studying a few chapters and scoring high, and saving time for studying other subjects.

• Accuracy Increases: With expertise in these units, one can solve NEET biology questions easily and increase one’s scoring power.

• Gain Confidence: With complete command over these units, one can solve questions easily and stay cool during the NEET exam.

Most Scoring Units in NEET Biology 2027

All students may not be able to cover the entire syllabus, but with proper planning and studying units of higher weightage, one can definitely hope to achieve a good score. Here are some useful tips for achieving 600+ in NEET. After the analysis of NEET 2027 papers of the past five years, it has become clear that the following units have been consistently asked each year. In total, they account for over 60% of the marks in the Biology section.

Structural Organisation in Animals & Plants

The main focus of this unit is on tissues, functions, and locations in plants and animals. Questions in this topic are usually memory-based and directly from the NCERT. Important chapters for this unit include:

• Structural Organisation in Animals

• Morphology of Flowering Plants

• Anatomy of Flowering Plants

Cell Structure & Function

This is an important unit of Biology. The questions are conceptual in nature and revolve around the organelles, enzymes, proteins, and especially the phases of mitosis and meiosis. Important chapters for this unit are

• Biomolecules

• Cell: The Unit of Life

• Cell Cycle and Cell Division

Reproduction

This unit includes human and plant reproduction. It consists of diagram-based or sequence-based questions. Important chapters of this unit include:

• Sexual Reproduction in Flowering Plants

• Human Reproduction

• Human Health and Disease

Genetics & Evolution

This unit contains questions based on logic and application. The need for knowledge about the crosses of genetics and interaction between genes is crucial. Important chapters in this unit are:

• Principles of Inheritance & Variation

• Molecular Basis of Inheritance

Biotechnology & Its Application

This unit deals with the principles of biotechnology like genetic engineering and bioprocess engineering. It also contains knowledge about the process of recombinant DNA technology. Important chapters in this unit are:

• Biotechnology: Principles and Processes

Ecology & Environment

Most of the questions are based on the interactions within the populations and functioning of the ecosystems. The questions are memory-based and directly from the NCERT line. Important chapters in this unit are:

• Organisms & Populations

• Ecosystem

NEET Biology 2027 Chapter-Wise Weightage Table

The table below shows some important units to study along with their corresponding chapters and weightages of those units in terms of marks, as per the previous years' analysis. These units collectively account for 60-65% marks in the subject of Biology and hence become do or die chapters for the NEET 2027 exam.

Botany vs Zoology: Chapter-Wise Weightage in NEET Biology 2027

Although both Botany and Zoology have an equal weightage of 180 marks in the NEET 2027 exam, there are some differences when it comes to NEET high-weightage chapters. These differences can be understood from the below-mentioned analysis of weightage:

It can be observed from the table that botany dominates the high-weightage chapters, as it includes genetics, the molecular basis of inheritance and biotechnology. Therefore, start biology with botany chapters to gain confidence and cover a large portion of the syllabus early.

How to Prepare the Most Important Units for NEET Biology 2027?

With all the units identified that carry maximum importance, it becomes imperative to create a good strategy to prepare the same.

Follow the NCERT Word by Word

Almost all the NEET questions are either directly or indirectly framed based on the NCERT lines and figures. It becomes very important to study the NCERT line by line for biology and mark the most important points and definitions.

Learn through Concept Maps and Flash Cards

Concept maps and flow charts play an important role in learning the sequence of events. Stages of Prophase I in Meiosis I is one such frequently asked topic in NEET.

Solve PYQs & Mock Tests

The NEET biology questions may be conceptual in nature or memory-based. In either case, PYQs and mock test help the brain to think and memorise the concepts at the same time.

Efficient Time Management

Devote most of your study time to such topics that carry maximum weight in terms of marks, and then spend the remaining time on low-weightage topics. Revision should be your topmost priority instead of perfection in all the topics, as revising one topic five times will definitely fetch you more than reading five chapters once.

Use Mnemonics

Mnemonics are easy, fast and fun. They help you learn even the longest topics within minutes. Topics that involve some procedure, like rDNA technology.

NEET 2027 Biology Practice Questions from High-Weightage Units

Test your understanding with these previous year NEET biology questions:

Reproduction

Q1. Select the correct statement:

A. In human pregnancy, the major organ systems are formed by the end of 12 weeks.

B. In human pregnancy, the major organ systems are formed by the end of 8 weeks.

C. In human pregnancy heart is formed after one month of gestation.

D. In human pregnancy, limbs and digits develop by the end of the second month.

E. In human pregnancy, the appearance of hair is usually observed in the fifth month.

Options:

1. A, C, D and E only

2. A and E only

3. B and C only

4. B, C, D, and E only

Difficulty: Medium

Explanation:

• B is correct: In human pregnancy, the embryonic period, which is the period of organogenesis during which the major organ systems are developed, ends at 8 weeks.

• C is correct: The heart is formed after one month of gestation.

• D is correct: Limbs and digits develop by the end of the second month.

• E is correct: In the fifth month, fine hair appears on the head.

• A is incorrect because organ systems are already formed by the 8th week, not the 12th.

Hence, the correct answer is option 4) B, C, D, and E only.

Genetic and Evolution

Q2. Match List I with List II :

Choose the correct answer from the options given below :

Options:

1. A-I, B-II, C-III, D-IV

2. A-II, B-III, C-IV, D-I

3. A-III, B-IV, C-I, D-II

4. A-IV, B-I, C-II, D-III

Difficulty: Medium

Explanation:

• Down’s syndrome is due to the presence of an additional copy of chromosome number 21.

• Klinefelter’s syndrome is caused by the presence of an additional copy of X-chromosome.

• α -Thalassemia is controlled by two closely linked genes on chromosome 16 of each parent.

• β-Thalassemia is controlled by a single gene HBB on chromosome 11 of each parent.

Hence, the correct answer is option 3) A-III, B-IV, C-I, D-II.

Cell Structure and Function

Q3. The following are the stages of cell division:

A. Gap 2 phase

B. Cytokinesis

C. Synthesis phase

D. Karyokinesis

E. Gap 1 phase

Choose the correct sequence of stages from the options given below:

Options:

1. C-E-D-A-B

2. E-B-D-A-C

3. B-D-E-A-C

4. E-C-A-D-B

Difficulty: Medium

Explanation:

The cell cycle is divided into two phases

1. Interphase

2. M phase (division phase)

The interphase itself has three phases:

1. G1 (first growth phase)-RNA and proteins are synthesised, and the cytoplasm increases.

2. S(synthesis phase): DNA is synthesised, and chromosomes are duplicated.

3. G2 (second growth phase)-RNA and proteins are synthesised for cell division.

The correct sequence of stages of cell division is

Gap 1 phase → Synthesis phase → Gap 2 phase → Karyokinesis → Cytokinesis
(E) (C) (A) (D) (B)

Hence, the correct answer is option 4) E-C-A-D-B.