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NEET 2027 Possible Questions Series — Part 44

English Edition

Physics • Chemistry • Biology

NCERT Focus • Concept Building • MCQ Practice • Active Recall • Error Analysis

Meta Description

NEET 2027 Part 44 with NCERT-focused practice questions from Physics, Chemistry and Biology, covering Wave Optics, Amines, and Biotechnology: Principles and Processes.

SEO Keywords

NEET 2027, NEET preparation, NEET MCQs, NCERT questions, Wave Optics, Amines, Biotechnology Principles and Processes, Physics MCQ, Chemistry MCQ, Biology MCQ

Hashtags

#NEET2027 #NEETPreparation #NEETMCQ #NCERT #Physics #Chemistry #Biology #NEETAspirants #NEETRevision #NEETPractice

Introduction

Welcome to Part 44 of the NEET 2027 Possible Questions Series.

This part covers three important areas:

⚛️ Physics — Wave Optics

🧪 Chemistry — Amines

🧬 Biology — Biotechnology: Principles and Processes

The objective is not simply to memorise answers. The objective is to understand the concepts well enough to recall and apply them during an examination.

Understand → Recall → Practise → Analyse → Revise

Important: These are independently prepared practice questions. They are not official NEET 2027 questions and are not guaranteed predictions.

⚛️ PHYSICS

Wave Optics

Question 1

The phenomenon of bending and spreading of light around the edges of an obstacle or aperture is called:

A. Reflection

B. Refraction

C. Diffraction

D. Dispersion

Answer: C. Diffraction

Question 2

Interference of light is a phenomenon that occurs due to:

A. Superposition of coherent light waves

B. Absorption of light only

C. Heating of a medium

D. Reflection from a single surface only

Answer: A. Superposition of coherent light waves

Question 3

For sustained interference, the sources should preferably be:

A. Coherent

B. Completely independent

C. At different frequencies

D. Non-periodic

Answer: A. Coherent

Question 4

In Young's double-slit experiment, the fringe width is given by:

A. �

B. �

C. �

D. �

Answer: A. �

Question 5

If the wavelength of light is increased in Young's double-slit experiment, the fringe width:

A. Decreases

B. Increases

C. Remains unchanged

D. Becomes zero

Answer: B. Increases

Question 6

The phenomenon of polarisation demonstrates that light is:

A. Longitudinal

B. Transverse

C. Mechanical

D. Stationary

Answer: B. Transverse

Question 7

When two waves interfere constructively, their resultant intensity can be:

A. Greater than the intensity of either wave individually

B. Always zero

C. Always unchanged

D. Negative

Answer: A. Greater than the intensity of either wave individually

Question 8

The central bright fringe in Young's double-slit experiment is produced when the path difference is:

A. �

B. �

C. Zero

D. �

Answer: C. Zero

🧪 CHEMISTRY

Amines

Question 1

Amines are derivatives of:

A. Ammonia

B. Methane only

C. Water

D. Carbon dioxide

Answer: A. Ammonia

Question 2

The functional group characteristic of primary amines is:

A. –OH

B. –NH₂

C. –COOH

D. –CHO

Answer: B. –NH₂

Question 3

Which of the following is a primary amine?

A. CH₃NH₂

B. (CH₃)₂NH

C. (CH₃)₃N

D. NH₄Cl

Answer: A. CH₃NH₂

Question 4

Amines generally behave as bases because nitrogen has:

A. A lone pair of electrons

B. No electrons

C. A positive charge always

D. No valence electrons

Answer: A. A lone pair of electrons

Question 5

Aniline is:

A. An aromatic amine

B. An alcohol

C. A carboxylic acid

D. An ether

Answer: A. An aromatic amine

Question 6

The basicity of an amine is related to the availability of:

A. The lone pair on nitrogen

B. The carbon nucleus

C. Neutrons

D. The hydrogen nucleus only

Answer: A. The lone pair on nitrogen

Question 7

Diazonium salts are particularly important in the chemistry of:

A. Aromatic amines

B. Alkanes only

C. Ethers only

D. Alcohols only

Answer: A. Aromatic amines

Question 8

The conversion of a primary aromatic amine into a diazonium salt is called:

A. Diazotisation

B. Esterification

C. Hydrogenation

D. Polymerisation

Answer: A. Diazotisation

🧬 BIOLOGY

Biotechnology: Principles and Processes

Question 1

Biotechnology broadly involves the use of:

A. Living organisms, cells or biological systems for useful applications

B. Only metals

C. Only inorganic chemicals

D. Only gravitational forces

Answer: A. Living organisms, cells or biological systems for useful applications

Question 2

Restriction enzymes are commonly used to:

A. Cut DNA at specific sites

B. Produce ATP directly

C. Destroy all proteins

D. Synthesize lipids

Answer: A. Cut DNA at specific sites

Question 3

DNA ligase is responsible for:

A. Joining DNA fragments

B. Cutting DNA at recognition sites

C. Producing glucose

D. Destroying RNA only

Answer: A. Joining DNA fragments

Question 4

A plasmid is commonly used in genetic engineering as:

A. A cloning vector

B. A ribosome

C. A hormone

D. A carbohydrate

Answer: A. A cloning vector

Question 5

PCR is used primarily to:

A. Amplify DNA

B. Digest proteins

C. Produce antibodies directly

D. Destroy DNA

Answer: A. Amplify DNA

Question 6

PCR stands for:

A. Polymerase Chain Reaction

B. Protein Chemical Reaction

C. Primary Cellular Replication

D. Polymer Chain Reduction

Answer: A. Polymerase Chain Reaction

Question 7

The enzyme commonly used in PCR because it can withstand high temperatures is:

A. Taq DNA polymerase

B. Pepsin

C. Lipase

D. Amylase

Answer: A. Taq DNA polymerase

Question 8

A genetically modified organism is one whose:

A. Genetic material has been deliberately altered using biotechnology

B. Cells contain no DNA

C. Body contains no proteins

D. Metabolism has completely stopped

Answer: A. Genetic material has been deliberately altered using biotechnology

📚 QUICK REVISION

⚛️ Physics — Wave Optics

Interference

Superposition of coherent waves produces interference.

Diffraction

Light spreads around obstacles or apertures.

Young's Double-Slit Experiment

Fringe width:

�

Therefore:

Wavelength ↑ → Fringe width ↑

Screen distance � ↑ → Fringe width ↑

Slit separation � ↑ → Fringe width ↓

Polarisation

Polarisation demonstrates the transverse nature of light.

🧪 Chemistry — Amines

Amines

Organic derivatives of ammonia.

Primary Amine

R–NH₂

Secondary Amine

R₂NH

Tertiary Amine

R₃N

Important Concept

Nitrogen contains a lone pair of electrons, which is responsible for the basic character of amines.

Aniline

An important aromatic amine.

Diazotisation

Conversion of a primary aromatic amine into a diazonium salt under appropriate conditions.

🧬 Biology — Biotechnology

Restriction Enzyme

Cuts DNA at specific recognition sequences.

DNA Ligase

Joins DNA fragments.

Plasmid

Commonly used as a cloning vector.

PCR

Amplifies DNA.

Taq DNA Polymerase

Heat-stable DNA polymerase used in PCR.

Recombinant DNA Technology

A simplified sequence is:

DNA Isolation → Cutting → Joining → Introduction into Host → Selection/Expression

🧠 ACTIVE RECALL

Try answering without looking above.

Physics

What is interference?

What is diffraction?

What does polarisation demonstrate about light?

Write the formula for fringe width.

What happens to fringe width when wavelength increases?

Chemistry

Amines are derivatives of which compound?

What is the general structure of a primary amine?

Why are amines basic?

What is aniline?

What is diazotisation?

Biology

What is the function of a restriction enzyme?

What does DNA ligase do?

What is a plasmid commonly used for?

What is PCR?

Why is Taq polymerase useful in PCR?

🎯 CONCEPT CONNECTION

Physics

Coherent Sources → Superposition → Interference → Bright/Dark Fringes

Understanding the relationship between wavelength, slit separation and screen distance makes numerical problems easier.

Chemistry

Nitrogen → Lone Pair → Proton Acceptance → Basic Character

The availability of the lone pair is central to understanding amine basicity.

Biology

Restriction Enzyme → DNA Cutting

DNA Ligase → DNA Joining

Vector → DNA Transfer

PCR → DNA Amplification

Together these concepts form an important foundation for recombinant DNA technology.

📊 ERROR ANALYSIS

After solving the questions, classify each mistake:

Concept Error

You did not understand the idea.

Recall Error

You studied it but could not remember it.

Application Error

You understood the concept but could not apply it.

Formula Error

You used or remembered the wrong formula.

Careless Error

You knew the answer but selected the wrong option.

For every error, record:

Question → My Answer → Correct Answer → Reason → Revision Date

Your error notebook should become one of your most valuable revision resources.

📖 SMART REVISION STRATEGY

Physics

Use:

Concept → Formula → Derivation/Meaning → Numerical → Revision

Don't memorise formulas without understanding what each quantity represents.

Chemistry

Use:

Functional Group → Structure → Properties → Reaction → Reagent → MCQ

Biology

Use:

NCERT → Keywords → Diagrams/Processes → Active Recall → MCQs

Remember:

Reading creates familiarity.

Recall creates memory.

Practice creates accuracy.

Analysis creates improvement.

🌟 MOTIVATION

My friend, there will be days when preparation feels easy.

There will also be days when even familiar topics seem difficult.

Don't panic when that happens.

Your brain needs repeated exposure before knowledge becomes strong and easily accessible.

A difficult question is not proof that you are weak.

A wrong answer is not proof that you cannot succeed.

It is information.

It tells you where your preparation needs attention.

Every mistake can become a map to your next improvement.

Don't hide from difficult chapters.

Break them down.

Study one concept.

Solve a few questions.

Check your mistakes.

Revise.

Then continue.

You don't need extraordinary motivation every day.

You need a system that allows you to continue even when motivation is low.

Discipline carries you on the days motivation cannot.

And gradually, those ordinary study days become extraordinary progress.

🔄 SEVEN-STEP STUDY CYCLE

1. Read

Read the relevant NCERT/textbook material carefully.

2. Understand

Ask yourself why the concept works.

3. Recall

Close the book and reproduce the key points.

4. Practise

Solve MCQs without immediately checking the answers.

5. Analyse

Understand every mistake.

6. Revise

Return to your weak areas.

7. Retest

Test yourself after a suitable gap.

Study → Recall → Test → Correct → Repeat

⚠️ IMPORTANT NEET REMINDER

Do not rely exclusively on predicted questions.

A strong NEET preparation should include:

NCERT + Official Syllabus + Previous-Year Questions + MCQs + Mock Tests + Revision + Error Analysis

Possible-question series can be useful for additional practice, but they cannot replace complete preparation.

⚠️ DISCLAIMER

This material is provided for educational and practice purposes only.

The questions are independently prepared practice questions. They are not official NEET 2027 questions and are not guaranteed predictions.

No one can reliably guarantee the exact questions that will appear in a future examination.

Students should prioritise the latest official syllabus, NCERT textbooks, previous-year questions and official examination information.

🔑 PART 44 KEY TAKEAWAYS

⚛️ Physics

Interference → Superposition of coherent waves

Diffraction → Spreading/bending around apertures or obstacles

Polarisation → Transverse nature of light

Fringe Width → �

�

🧪 Chemistry

Amines → Derivatives of ammonia

Primary Amine → R–NH₂

Secondary Amine → R₂NH

Tertiary Amine → R₃N

Basic Character → Lone Pair on Nitrogen

Aniline → Aromatic Amine

Diazotisation → Formation of Diazonium Salt from Primary Aromatic Amine

🧬 Biology

Restriction Enzyme → DNA Cutting

DNA Ligase → DNA Joining

Plasmid → Cloning Vector

PCR → DNA Amplification

Taq Polymerase → Heat-Stable Polymerase

Recombinant DNA Technology → Cutting + Joining + Transfer + Selection/Expression

Conclusion

Part 44 has covered:

⚛️ Wave Optics

🧪 Amines

🧬 Biotechnology: Principles and Processes

Remember that successful preparation is not about knowing everything immediately.

It is about improving repeatedly.

Understand one concept.

Solve one question.

Correct one mistake.

Revise one weak area.

Then repeat.

Your preparation grows through thousands of small improvements.

So don't underestimate today's study session.

Today's small effort can become tomorrow's confidence.

Keep moving forward with patience, discipline and consistency.

🌟 One concept at a time. One question at a time. One day at a time.

Written with AI