NEET Important Questions 2027 with Solutions (Most Expected & High Weightage)

Top 5 Most Expected Questions for NEET 2027

Below is the list of the top 5 questions that students might expect in NEET 2027 according to the NEET previous years' trend and NEET high weightage topics. Solving these questions will not only help in understanding the important concepts but also improve your NEET strategy. Also, analyse high-weightage physics and chemistry numericals through these questions.

Ques 1: The protein part of an enzyme is called:

A. Prosthetic group

B. Cofactor

C. Coenzyme

D. Apoenzyme

Correct Answer: D

Explanation:

Apoenzyme is the protein portion; cofactor is the non-protein component.

Ques 2: Which factor is responsible for termination of transcription?

A. Gamma (γ)

B. Alpha (α)

C. Sigma (σ)

D. Rho (ρ)

Correct Answer: D

Explanation:

Rho factor helps terminate transcription in prokaryotes.

Ques 3: Which hormone is released by the pituitary but synthesised in the hypothalamus?

A. ACTH

B. LH

C. ADH

D. FSH

Correct Answer: C

Explanation:

ADH is synthesised in the hypothalamus and stored/released by the posterior pituitary.

Ques 4. In a circuit with a $1,H$ inductor, $2,\Omega$ resistor, and $5,V$ battery, if current is $2,A$ increasing at $1,A/s$, find $V_A - V_B$.

Options:

(1) $6,V$

(2) $9,V$

(3) $10,V$

(4) $5,V$

Correct Answer: (4) $5,V$

Explanation:

Using the relation,

$V = IR + L\frac{di}{dt}$

$V = 2 \times 2 + 1 \times 1 = 5,V$

Hence, the correct answer is (4) $5,V$

Ques 5: Correct order of decreasing basic strength of amines is:

Options:
A. benzenamine > ethanamine > N-methylaniline > N-ethylethanamine
B. N-methylaniline > benzenamine > ethanamine > N-ethylethanamine
C. N-ethylethanamine > ethanamine > benzenamine > N-methylaniline
D. N-ethylethanamine > ethanamine > N-methylaniline > benzenamine

Correct Answer: D

Explanation:
Aliphatic amines are more basic than aromatic; electron-donating groups increase basicity.

NEET Biology Important Questions with Solutions

Biology carries the highest weightage in NEET, and most questions are directly based on NCERT concepts. Include practising these questions multiple times as part of the NEET preparation strategy.

Practice more in our detailed NEET Biology important questions with solutions, and download the complete NEET Biology important questions PDF.

Some important NEET Biology questions are given below for practise:

Ques 1: Which of the following is the correct unit of productivity in an ecosystem?

A. (KCal m⁻²) yr⁻¹

B. gm⁻²

C. KCal m⁻²

D. KCal m⁻³

Correct Answer: A

Explanation:

Productivity is measured as the rate of energy production per unit area per unit time, hence expressed as KCal m⁻² yr⁻¹.

Ques 2: The first occurrence of menstruation in females is known as:

A. Ovulation

B. Menopause

C. Menarche

D. Diapause

Correct Answer: C

Explanation:

Menarche marks the beginning of the menstrual cycle in females, indicating reproductive maturity.

Ques 3: Genes R and Y assort independently. If RRYY produces round yellow seeds and rryy produces wrinkled green seeds, what is the phenotypic ratio in the F₂ generation?

A. 9:7

B. 1:2:1

C. 3:1

D. 9:3:3:1

Correct Answer: D

Explanation:

This is a classic dihybrid cross showing independent assortment, resulting in a 9:3:3:1 phenotypic ratio.

Ques 4: What is the main function of spindle fibres during mitosis?

A. Regulate cell growth

B. Separate chromosomes

C. Synthesise DNA

D. Repair DNA

Correct Answer: B

Explanation:

Spindle fibres attach to centromeres and pull sister chromatids apart during cell division.

Ques 5: How many meiotic and mitotic divisions are required to form a mature female gametophyte from a megaspore mother cell in angiosperms?

A. No meiosis and 2 mitosis

B. 2 meiosis and 3 mitosis

C. 1 meiosis and 2 mitosis

D. 1 meiosis and 3 mitosis

Correct Answer: D

Explanation:

One meiosis produces four megaspores, followed by three mitotic divisions to form the embryo sac.

NEET Physics Important Questions with Solutions

Practising NEET Physics Important Questions with Solutions is a highly effective method of revising high-priority concepts. These questions have been picked on the basis of repeated concepts and trends from past years. In addition to practicing mock tests and chapter-wise Previous Year Questions, NEET Physics Important Questions with Solutions can really elevate your NEET 2027 score.

Q1. If a physical quantity is given by $P = a^3b^2cd$, and the percentage errors in $a$, $b$, $c$, and $d$ are $1$, $3$, $2$, and $4$ respectively, what is the percentage error in $P$?

Options:

1. $2$

2. $13$

3. $15$

4. $10$

Correct Answer: (2) $13$

Explanation:

Percentage error in $P$ is:

$\frac{\Delta P}{P} = 3\frac{\Delta a}{a} + 2\frac{\Delta b}{b} + \frac{\Delta c}{c} + \frac{\Delta d}{d}$

$= 3(1) + 2(3) + 2 + 4 = 13\%$

Q2. Unpolarized light passes through a polarizer. A second polarizer is placed perpendicular to it, and a third polarizer is inserted between them at an angle of $22.5^\circ$. If the intensity after the first polarizer is $I_0$, what is the final transmitted intensity?

Options:

1. $\frac{I_0}{4}$

2. $\frac{I_0}{8}$

3. $\frac{I_0}{16}$

4. $\frac{I_0}{2}$

Correct Answer: (2) $\frac{I_0}{8}$

Explanation:

Using Malus' law:

$I = I_0\cos^2\theta\cos^2(90^\circ-\theta)$

$= I_0\cos^2\theta\sin^2\theta$

$= \frac{I_0}{4}\sin^2(2\theta)$

For $\theta = 22.5^\circ$:

$I = \frac{I_0}{8}$

Q3. Two circular copper coils carry the same current of $2\,A$. If the ratio of their radii is $1:2$, what is the ratio of their magnetic moments?

Options:

1. $1:2$

2. $2:1$

3. $4:1$

4. $1:4$

Correct Answer: (4) $1:4$

Explanation:

Magnetic moment:

$M = I\pi r^2$

Since the current is the same:

$M \propto r^2$

Therefore:

$\frac{M_1}{M_2} = \frac{1^2}{2^2} = \frac{1}{4}$

Hence, the ratio is $1:4$.

Q4. A Vernier calliper is used to measure the diameter of a sphere. Given that $10$ vernier scale divisions coincide with $9$ main scale divisions, the least count of the main scale is $0.1\,cm$, the main scale reading is $5\,cm$, the $8$th vernier division coincides, and the zero error is $+0.1\,cm$, what is the corrected diameter?

Options:

1. $5.08\,cm$

2. $4.98\,cm$

3. $5.00\,cm$

4. $5.18\,cm$

Correct Answer: (2) $4.98\,cm$

Explanation:

Least count:

$= 0.1 - 0.09 = 0.01\,cm$

Observed reading:

$= 5 + 8 \times 0.01 = 5.08\,cm$

Corrected reading:

$= 5.08 - 0.1 = 4.98\,cm$

Q5. A photon and an electron (of mass $m$) have the same energy $E$. What is the ratio of their de Broglie wavelengths $\left(\frac{\lambda_{\text{photon}}}{\lambda_{\text{electron}}}\right)$?

Options:

1. $\frac{c}{\sqrt{2mE}}$

2. $\frac{c}{\sqrt{2mE}}$

3. $\frac{1}{c\sqrt{2mE}}$

4. $\frac{E}{\sqrt{2m}}$

Correct Answer: (2) $\frac{c}{\sqrt{2mE}}$

Explanation:

For a photon:

$\lambda_{\text{photon}} = \frac{hc}{E}$

For an electron:

$\lambda_{\text{electron}} = \frac{h}{\sqrt{2mE}}$

Therefore:

$\frac{\lambda_{\text{photon}}}{\lambda_{\text{electron}}}
= \frac{\frac{hc}{E}}{\frac{h}{\sqrt{2mE}}}
= \frac{c\sqrt{2mE}}{E}
= c\sqrt{\frac{2m}{E}}$

NEET Chemistry Important Questions with Solutions

Chemistry includes some NEET chapters with maximum numerical questions and some concept based chapters. So questions require balanced NEET preparation.

Practice more in our detailed NEET Chemistry important questions with solutions and download NEET Chemistry previous year question papers PDF.

Ques 1: If the molar conductivity (Λm) of a 0.050 mol L⁻¹ solution of a monobasic weak acid is 90 S cm² mol⁻¹, its degree of dissociation will be [Λ°₊ = 349.6 S cm² mol⁻¹ and Λ°₋ = 50.4 S cm² mol⁻¹]

Options:
A. 0.215
B. 0.115
C. 0.125
D. 0.225

Correct Answer: D

Explanation:
Degree of dissociation (α) = Λm / Λ°
Λ° = 349.6 + 50.4 = 400
α = 90 / 400 = 0.225

Ques 2: Given two statements:
Statement I: A diatomic molecule with bond order zero is stable.
Statement II: Bond length increases with increase in bond order.

Options:
A. Statement I is false, Statement II is true
B. Both statements are true
C. Both statements are false
D. Statement I is true, Statement II is false

Correct Answer: C

Explanation:
Bond order zero molecules are unstable, and bond length decreases as bond order increases.

Ques 3: The ratio of wavelengths absorbed by a Hydrogen atom for transitions n=2→3 and n=4→6 is:

Options:
A. 1/4
B. 1/36
C. 1/16
D. 1/9

Correct Answer: A

Explanation:
Using Rydberg relation, energy difference determines wavelength; ratio simplifies to 1/4.

Ques 4: Correct order of wavelength absorbed by complexes:
[Co(NH₃)₆]³⁺ (A), [Co(CN)₆]³⁻ (B), [Cu(H₂O)₄]²⁺ (C), [Ti(H₂O)₆]³⁺ (D)

Options:
A. C < A < D < B
B. B < D < A < C
C. B < A < D < C
D. C < D < A < B

Correct Answer: C

Explanation:
Stronger ligands cause larger splitting → absorb shorter wavelength; CN⁻ is strongest ligand.

Ques 5: If rate constant k = 0.03 s⁻¹, time required for concentration to decrease from 7.2 to 0.9 mol L⁻¹ is:

Options:
A. 21.0 s
B. 69.3 s
C. 23.1 s
D. 210 s

Correct Answer: B

Explanation:
First-order: t = 2.303/k × log (a/a₀)
t = 2.303/0.03 × log(7.2/0.9) ≈ 69.3 s

NEET Chapter-wise Important Questions (High Weightage Topics)

To score well in NEET 2027, focusing on chapter-wise important questions is essential. Certain chapters that cover 60% of NEET syllabus and produce repeated questions.

Biology Chapter-wise Important Questions

High-weightage chapters:

• Principles of Inheritance and Variation
• Cell Cycle and Cell Division
• Sexual Reproduction in Flowering Plants
• Molecular Basis of Inheritance
• Human Health and Disease

These chapters contribute a large portion of NEET Biology questions every year.

Practice more in NEET Biology important questions with solutions and download the NEET Biology important questions PDF.

NEET physics important questions Chapter-wise

• Current Electricity
• Electrostatic Potential and Capacitance
• Ray Optics and Optical Instruments
• Gravitation
• Semiconductor Electronics

These chapters form the core of NEET Physics and are frequently tested.

Practice more in NEET Physics important questions with solutions and attempt NEET mock tests regularly.

Chemistry Chapter-wise Important Questions

High-weightage chapters:

• Chemical Kinetics
• Electrochemistry
• Thermodynamics
• Aldehydes, Ketones and Carboxylic Acids
• Hydrocarbons

These topics are consistently important and often include direct or concept-based questions.

Practice more in NEET Chemistry important questions with solutions and download the NEET Chemistry important questions PDF.

Most Repeated Questions in NEET (PYQ Analysis)

Analysis of previous year NEET question papers shows that many questions are repeated directly or indirectly. Common patterns include:

• Similar concepts asked with different values
• NCERT-based theory questions
• Repeated high-weightage topics

This makes practising NEET previous year question papers and important questions extremely important for preparation.

How to Use These Questions for Maximum Score

NEET Important Questions 2027 will allow you to concentrate on key concepts rather than going through everything again and again. Practice these questions along with NCERT, chapter-wise PYQs and Mock Tests to enhance your preparation level and get a good overall score.

• Revision of high-scoring and commonly asked topics
• Conceptual clarity of topics that come up regularly in NEET
• Improves speed and accuracy
• Identifies weaknesses and revises effectively
• Decreases negative marking through reduced guessing
• Boosts confidence for NEET 2027 Exam