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 the same in 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

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.

NEET 2027 Biology: Top 100 Questions Selection Method

These NEET biology top 100 important questions were chosen on the basis of analysis of NEET previous year papers. Analysis of NEET papers is an effective tool to understand the pattern and recurring topics in the paper and score 330+ marks in the NEET biology paper.

Read NEET chapter-wise weightage analysis to find the topics with high-scoring chapters. Top 100 NEET 2027 Biology questions have also included diagram-based, application-based, and assertion-reasoning type questions, which have been asked repeatedly by NTA in NEET previous years question papers.

The National Eligibility cum Entrance Test (NEET) is a national-level entrance test that is held offline in pen-and-paper mode by NTA for getting admission in MBBS, BDS, Ayush and other medical courses. Physics, Chemistry & Biology subjects are tested.