Top 100 Questions in NEET 2027 Biology to Score 330+ Marks

NEET Biology Top 100 Questions PDF to Score 330+ Marks

Careers360 has compiled the best 100 questions for NEET Biology after going through the previous year question papers. The top 100 questions were compiled from NEET Biology concepts asked many times in past NEET exams. Students can download the top 100 NEET Biology questions and add them to their study plan for effective preparation.

NEET Biology Most Asked Questions to Score 330+ Marks

Some concepts in biology are asked frequently by NTA, making them important for the NEET exam. Some of the top 100 NEET biology questions are given below. The entire list of 100 Top questions of NEET Biology 2027 can be downloaded from the PDF link given below.

Q1. In bryophytes, the gemmae help in which one of the following? (Biological Classification)

1. Gaseous exchange

2. Sexual reproduction

3. Asexual reproduction

4. Nutrient absorption

Difficulty Level: Easy

Correct answer: 3) Asexual reproduction

Explanation:

Gemmae are minute, green, multicellular, asexual reproductive organs of bryophytes such as Marchantia. They are developed in gemma cups and water-dispersed. Every gemma grows into a new plant, thereby contributing to asexual reproduction. As gemmae are genetically similar to the parent, they provide for the maintenance of successful characters.

Q2. Which of the following is an example of a zygomorphic flower? (Morphology of Flowering Plants)

1. Chilli

2. Petunia

3. Datura

4. Pea

Difficulty Level: Easy

Correct answer: 4) Pea

Explanation:

Zygomorphic flowers are those exhibiting bilateral symmetry, so that they may be split into two similar halves along one plane only. Chilli, Datura, and Petunia possess a regular or actinomorphic flower (radial symmetry). Pea flowers (Pisum sativum) are zygomorphic.

Hence, the correct answer is option 4) Pea.

Question 3: Select the incorrect statement regarding synapses: (Neural Control and Coordination)

1. Electrical current can flow directly from one neuron to another across the

electrical synapse.

2. Chemical synapses use neurotransmitters.

3. Impulse transmission across a chemical synapse is always faster than an electrical

synapse.

4. The membranes of presynaptic and postsynaptic neurons are nearby in an

electrical synapse.

Difficulty Level: Medium

Correct answer: 3) Impulse transmission across a chemical synapse is always faster than an electrical synapse.

Explanation:

The electrical synapse is faster than the chemical synapse. An electrical synapse is faster because it relies on gap junctions, which are specialised protein channels that directly connect the cytoplasm of two adjacent neurones. These gap junctions allow ions and small molecules to pass directly from one neuron to another, enabling an electrical signal to travel almost instantaneously.

Hence, the correct answer is option 3) Impulse transmission across a chemical synapse is always faster than an electrical synapse.

Question 4: Which of the following is not a component of the Fallopian tube? (Human Reproduction)

1. Uterine fundus

2. Isthmus

3. Infundibulum

4. Ampulla

Difficulty Level: Medium

Correct answer: 1) Uterine fundus

Explanation:

The correct answer is option (1) as the uterine fundus is the upper, dome-shaped part of the uterus, above the opening of the fallopian tubes.

Option (2) is incorrect as the isthmus is the last and narrow part of the oviduct that links to the uterus.

Option (3) is incorrect as the infundibulum is the part of the oviduct that is closer to the ovary.

Option (4) is incorrect as the ampulla is the wider part of the oviduct.

Hence, the correct answer is option 1) Uterine fundus

Question 5. ELISA assay uses. (Biotechnology and its applications)

1. An enzyme that can react with secondary antibodies.
2. An enzyme that can react with the antigen.
3. A substrate that gets converted into a coloured product.
4. A labelled secondary antibody.

Difficulty Level: Difficult

Correct answer: 3) A substrate that gets converted into a colored product.

Explanation:
ELISA (Enzyme-Linked Immunosorbent Assay) is a commonly used biochemical assay that utilises a substrate that can be converted into a coloured product by an enzymatic reaction. In ELISA, the substrate is usually a chromogenic compound that is linked to an enzyme, such as horseradish peroxidase (HRP) or alkaline phosphatase (AP).

Hence, the correct answer is option 3) A substrate that gets converted into a colored product.

Q6. In the archegonium of Funaria, the number of neck canal cells is (Plant Kingdom)

1. 2

2. 3

3. 5

4. 8-10

Difficulty Level: Easy

Correct answer: 4) 8-10

Explanation:

The archegonium of Funaria, a type of moss, is the female reproductive organ that facilitates the production of eggs for fertilisation. The neck is long and twisted, and contains 8-10 neck canal cells, which play a crucial role in the process of fertilisation by guiding the sperm towards the egg.

Hence, the correct answer is option 4) 8-10.

Q7. The algal cell wall is made up of (Plant Kingdom)

1. Cellulose, hemicellulose, and pectins

2. Pectins, cellulose, and proteins

3. Hemicellulose, pectins, and proteins

4. Cellulose, galactans, and mannans

Difficulty Level: Easy

Correct answer: 4) Cellulose, galactans, and mannans

Explanation:

The algal cell wall is made up of cellulose, galactans, and mannans. The algal cell wall is a rigid structure that provides protection and maintains the shape of the cell. In addition to cellulose, galactans, and mannans, some algal cell walls contain minerals like calcium carbonate, contributing to structural strength.

Hence, the correct answer is option 4) Cellulose, galactan, and mannans.

Q8. Which one of the following is the characteristic feature of gymnosperms? (Plant Kingdom)

1. Gymnosperms have flowers for reproduction.

2. Seeds are enclosed in fruits.

3. Seeds are naked.

4. Seeds are absent.

Difficulty Level: Easy

Correct answer: 3) Seeds are naked

Explanation:

Gymnosperms are seed plants but do not produce fruit. The characteristic feature of gymnosperms is the occurrence of naked seeds. The seeds form on the surface of scale-like organs named sporophylls, which generally occur in the form of cones. Gymnosperms are woody plants that consist of conifers, cycads, and ginkgo.

Hence, the correct answer is option 3) Seeds are naked.

Q9. While trying to find out the characteristics of a newly found animal, a

researcher did the histology of an adult animal and observed a cavity with the

presence of mesodermal tissue towards the body wall, but no mesodermal tissue

was observed towards the alimentary canal. What could be the possible coelom

of that animal? (Animal Kingdom)

1. Spongocoelomate

2. Acoelomate

3. Pseudocoelomate

4. Schizocoelomate

Difficulty Level: Medium

Correct answer: 3) Pseudocoelomate

Explanation:

The animal, according to this question, probably has a pseudocoelom. In these animals, the body cavity is lined by mesoderm found along the body wall but not around the alimentary canal. Pseudocoelomates consist of creatures such as roundworms (Ascaris), which are members of the phylum Aschelminthes. This sort of cavity facilitates the movement and circulation of nutrients.

Hence, the correct answer is option 3) Pseudocoelomate.

Q10. The role of the water vascular system in Echinoderms is: (Animal Kingdom)

A. Respiration and Locomotion

B. Excretion and Locomotion

C. Capture and transport of food

D. Digestion and Respiration

E. Digestion and Excretion

Choose the correct answer from the options given below:

1. B, D, and E Only

2. A and B Only

3. A and C Only

4. B and C Only

Difficulty Level: Medium

Correct answer: 3) A and C only

Explanation:

In echinoderms, the water vascular system helps with respiration, locomotion, food capture, and transport, but it does not directly aid digestion or excretion. So, the correct statements are A and C only, as the water vascular system helps echinoderms move using tube feet and also helps in gas exchange (respiration) through those tube feet. Tube feet, powered by the water vascular system, help in grasping and moving food to the mouth.

Hence, the correct answer is option 3) A and C only.

Top 100 Questions in NEET Biology to Score 330+ Marks - Direct Download Link

How Many Correct Answers Are Needed to Score 330+ in NEET Biology?

Since the subject NEET Biology has a weightage of 360 marks, students have to be highly accurate to get more than 330 marks. The table below gives the marks obtained in Biology in relation to the number of correct answers without any wrong attempts and without any negative marking.

Students need at least 83 correct answers out of 90 to score above 330 marks when there are no incorrect attempts. Due to the negative marking in the actual test, a larger number of correct answers is needed for the students depending on the number of wrong answers they have.

How Were the 100 Best NEET Biology Questions Selected?

Based on the Class 11th and 12th NCERT Biology fundamentals, which form the basic foundation of NEET Biology.

• Previous year NEET question trends from 2021 till 2026, so that we can pick up concepts and topics that have been asked in the previous years.

• Concepts which need high conceptual clarity and memory skills.

• High-weightage chapters and recurring chapters in various NEET Biology question papers.

These questions do not give you any prediction about the upcoming NEET 2027 exam questions. These are high-yielding questions that will help you revise concepts and increase your accuracy levels. There is no official release of a chapter-wise list of important questions from the NTA, and there is also no guarantee about the chapter-wise weightage, so students must practice this question set in addition to complete syllabus coverage and NCERT revision.

Why You Should Practice the Top 100 NEET 2027 Biology Questions?

Scoring a better rank in the NEET exam is not easy; it requires a smart strategy. Solving NEET Biology’s top concepts will help aspirants strengthen their chances in NEET 2027. The strategy of getting a minimum of 330+ marks in NEET 2027 is highlighted in the NEET preparation tips.

• Studying high-weightage NEET Biology questions gives familiarity with the NEET exam pattern.

• These best 100 questions of NEET 2027 Biology are based on NCERT, and solving them helps you find your weak points that need to be avoided.
  The huge NEET syllabus becomes easy to cover by preparing the important NEET biology concepts.
  Confidence is an important factor for performance and attempting important NCERT-based NEET questions increases confidence and relieves stress.

Common Mistakes While Practising NEET Biology Questions

Prior to solving the top 100 NEET Biology questions, students must be familiar with some of the mistakes they may make that can impact accuracy and make their preparation less effective.

• Students can face problems with remembering the correct answer for a particular question due to not revising the associated NCERT chapter properly.

• A major mistake is solving questions from chapters having more weightage while leaving others.

• Solving previous year questions can help in knowing about the types of concepts asked in NEET.

• Failing to analyse the wrong answer will make it hard to work on improving that particular area.

• Taking the wrong step of assuming that solving the important questions will guarantee 330+ marks can harm your NEET Biology preparation.