The NEET 2021 paper had 200 questions across Biology, Physics and Chemistry, marked +4 for a correct answer and −1 for a wrong one. This page shows what it contained, which chapters it drew on, and 10 of its questions with answers.
| Exam | NEET 2021, Set P3 |
|---|---|
| Questions | 200 (100 Biology, 50 Physics, 50 Chemistry) |
| Duration | 3 hours 20 minutes |
| Marking | +4 for a correct answer, −1 for a wrong answer |
| How many to answer | The paper has 200 questions in two sections for each subject. Section A is compulsory, and in Section B students answer any 10 of 15, so 180 questions count. |
All questions, solutions and the All-India rank for this paper are in the app.
Questions are counted by the chapter they test. The chapters that carried the most were Molecular Basis of Inheritance (9), Biotechnology: Principles and Processes (7), Plant Kingdom (5). Use the counts to see where this paper put its weight, and click a chapter for practice questions.
A spread of 10 questions from the paper, chosen across the three subjects. The full paper is in the app.
The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is d/2, then the viscous force acting on the ball will be
Answer: B. Mg/2
Why: At terminal velocity, viscous force = weight − buoyancy. Buoyancy = (d/2)Vg = Mg/2, so viscous force = Mg − Mg/2 = Mg/2.
Twenty seven drops of same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.
Answer: A. 1980 V
Why: Charge adds (Q = 27q) and radius grows to R = 3r, so V = kQ/R becomes 27/3 = 9 times the single-drop potential: 9 × 220 V = 1980 V. (The booklet misprints 200 V per drop.)
Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :
Answer: A. 12, 6
Why: A hexagonal primitive cell contains 6 atoms, and the number of octahedral voids equals the number of atoms (6) while tetrahedral voids are twice that (12).
Given below are two statements : Statement I : Aspirin and Paracetamol belong to the class of narcotic analgesics. Statement II : Morphine and Heroin are non-narcotic analgesics. In the light of the above statements, choose the correct answer from the options given below.
Answer: C. Both Statement I and Statement II are false
Why: Aspirin and paracetamol are non-narcotic analgesics, while morphine and heroin are narcotic; so both statements are false.
In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?
Answer: C. H₂O < H₂S < H₂Se < H₂Te : Increasing pKa values
Why: Down group 16 the H–E bond weakens and acidity rises, so pKa falls from H₂O to H₂Te; the sequence is therefore not increasing in pKa.
DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as
Answer: C. Bright orange bands
Why: Ethidium bromide intercalates into DNA and fluoresces under UV light, making the DNA fragments visible as bright orange bands.
Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)?
Answer: B. Denaturation, Annealing, Extension
Why: Each PCR cycle runs denaturation of the template DNA, then primer annealing, then extension by Taq polymerase.
When gene targetting involving gene amplification is attempted in an individual's tissue to treat disease, it is known as :
Answer: C. Gene therapy
Why: Correcting or compensating for a defective gene in a person's tissues to treat a disease is gene therapy.
Which of the following statements wrongly represents the nature of smooth muscle?
Answer: D. Communication among the cells is performed by intercalated discs
Why: Intercalated discs are a feature of cardiac muscle, not smooth muscle, so the statement attributing them to smooth muscle is wrong.
During muscular contraction which of the following events occur? (a) 'H' zone disappears (b) 'A' band widens (c) 'I' band reduces in width (d) Myosine hydrolyzes ATP, releasing the ADP and Pi. (e) Z-lines attached to actins are pulled inwards. Choose the correct answer from the options given below:
Answer: B. (a), (c), (d), (e) only
Why: In sliding-filament contraction the H zone vanishes, I band shortens, myosin heads hydrolyse ATP and Z-lines are pulled inward; the A band keeps its length, so (b) is wrong and the answer is (a),(c),(d),(e).
The NEET 2021 paper (Set P3) in our collection has 200 questions: 100 in Biology, 50 in Physics and 50 in Chemistry. The paper has 200 questions in two sections for each subject. Section A is compulsory, and in Section B students answer any 10 of 15, so 180 questions count.
Each correct answer earns 4 marks and each wrong answer loses 1 mark. An unanswered question scores nothing.
The chapters that carried the most questions were Molecular Basis of Inheritance (9), Biotechnology: Principles and Processes (7), Plant Kingdom (5).
Yes. Open the NEET 2021 paper in the NeetVictory app, sit it under the real timing and marking, and see where you rank among students who have sat the same paper. Previous year papers are part of NeetVictory Pro.
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