NEET UG Daily Practice Questions For 2026 to score 650+ (DAY 12)

NEET UG Daily Practice Questions For 2026: Consistency is the real game-changer in NEET UG preparation, and daily practice is what separates average scores from the 650+ bracket. As you move into Day 12 of NEET UG Daily Practice Questions for 2026, the focus is on strengthening concepts, improving accuracy, and building exam-ready thinking through well-curated MCQs. Each question is designed to reflect NEET’s evolving pattern and help you identify gaps before they become scoring barriers.

PHYSICS

Q.1. A particle is projected horizontally with speed $u$ from the top of a tower of height $h$. Air resistance is negligible. Which statement best describes its motion?

A. Horizontal velocity remains constant while vertical velocity increases linearly with time

B. Horizontal velocity decreases while vertical velocity remains constant

C. Both horizontal and vertical components of velocity increase linearly with time

D. Both horizontal and vertical components of velocity remain constant

Q.2. A body of mass m is moving in a circle of radius r with constant speed v. What is the direction of the net force acting on the body at any instant?

A. Along the direction of motion (tangent to the circle)

B. Radially inward towards the centre

C. Zero, because speed is constant

D. Radially outward from the centre

Q.3. Which of the following best describes the phenomenon of total internal reflection?

A. Partial reflection of light when it passes from denser to rarer medium at any angle of incidence

B. Complete reflection of light when it passes from rarer to denser medium at normal incidence

C. Complete reflection of light back into the denser medium when angle of incidence exceeds the critical angle

D. Scattering of light in all directions when it hits a rough surface

Q.4. A block is projected up a rough inclined plane with initial speed u. It comes to rest after moving a distance s up the plane. Which change will increase the distance travelled before stopping, assuming all else remains the same?

A. Use a block of a different material but same μ

B. Decrease the angle of inclination of the plane

C. Increase the coefficient of friction

D. Decrease the mass of the block

Q.5. A current-carrying straight conductor is placed perpendicular to a uniform magnetic field. The force on the conductor is maximum when

A. The current is increased and length kept constant

B. The conductor is parallel to the magnetic field

C. The angle between current direction and field is ${90}^{\circ }$

D. The magnetic field is reduced to zero

Read Also: NEET UG Daily Practice Questions For 2026 to score 650+ (DAY 11)

CHEMISTRY

Q.6. Which of the following changes will shift the oxyhaemoglobin dissociation curve to the right, facilitating oxygen release to tissues?

A. Decrease in temperature

B. Decrease in ${\text{CO}}_2$ partial pressure

C. Increase in pH

D. Increase in ${\text{CO}}_2$ and ${\text{H}}^{+}$concentration in tissues

Q.7. A solution of a weak monobasic acid HA has pH = 4.0 and concentration $0.01\text{mol}{\text{L}}^{-1}$. Which change will most reliably allow you to estimate its ionization constant $K_a$ from pH measurements alone?

A. Add a strong acid and measure the new pH

B. Dilute the solution and measure the new pH

C. Increase temperature slightly without changing concentration

D. Add a strong base until neutralization is complete

Q.8. Which of the following sets represents colligative properties of solutions?

A. Boiling point elevation, viscosity, osmotic pressure, surface tension

B. Osmotic pressure, surface tension, viscosity, refractive index

C. Relative lowering of vapour pressure, boiling point elevation, freezing point depression, osmotic pressure

D. Relative lowering of vapour pressure, refractive index, freezing point depression, viscosity

Q.9. In a hydrogen-like atom, the radius of the first Bohr orbit is $r_1$. What will be the radius of the third orbit $r_3$ for the same atom?

A. $r_3=3r_1$

B. $r_3={\displaystyle \frac{r_1}{3}}$

C. $r_3=9r_1$

D. $r_3={\displaystyle \frac{r_1}{9}}$

Q.10. An organic compound with molecular formula $C_3{H}_{6}O$ gives a positive 2,4-DNP test and also gives a positive iodoform test. The compound is most likely:

A. Propanoic acid

B. Prop-2-en-1-ol

C. Propanone

D. Propanal

Read Also: The Right Way to Start Revision For NEET UG 2026 Even If Your Syllabus Is Incomplete

BIOLOGY

Q.11. Which of the following does not correctly represent an example of adaptive radiation?

A. Australian marsupials

B. Cactus varieties in different deserts of the world

C. Placental mammals in North America diverging into different ecological niches

D. Darwin’s finches on Galapagos Islands

Q.12. Which of the following is the correct sequence of events in the sliding filament theory of muscle contraction?

A. ATP binding → Cross-bridge detachment → Cross-bridge formation → Power stroke

B. Cross-bridge detachment → Cross-bridge formation → Power stroke → ATP binding

C. Power stroke → Cross-bridge formation → ATP binding → Cross-bridge detachment

D. Cross-bridge formation → Power stroke → ATP binding → Cross-bridge detachment

Q.13. An example of a codominant inheritance pattern in humans is:

A. Sickle-cell anemia in heterozygotes

B. ABO blood group system

C. Colour blindness

D. Haemophilia A

Q.14. Which of the following statements about DNA replication in prokaryotes is correct?

A. It is semiconservative and bidirectional from a single origin of replication

B. It proceeds in a unidirectional manner from the origin

C. It requires RNA primers synthesized by DNA polymerase I

D. It occurs during the $G_2$ phase of the cell cycle

Q.15. Which of the following statements about meiosis is most accurate?

A. Meiosis occurs in somatic cells for growth and repair

B. Meiosis maintains the chromosome number of the parent cell in daughter cells

C. Meiosis involves two successive divisions but only one round of DNA replication

D. Meiosis produces four genetically identical daughter cells

As you complete today’s practice set, remember that every question you attempt adds to your confidence and clarity. Regular analysis of mistakes and revision of weak areas will steadily push your score closer to the 650+ target. Stay disciplined, trust your preparation, and return tomorrow with the same focus, because NEET success is built one day, one question at a time.

Read Also: Daily Practice MCQ For NEET UG 2026 to score 650+

ANSWERS & EXPLANATIONS

Ans.1. A.  Horizontal velocity remains constant while vertical velocity increases linearly with time. In projectile motion without air resistance, gravity is the only force acting, and it acts vertically downward, causing a uniform vertical acceleration of magnitude $g$. 

Ans.2. B.  Radially inward towards the centre. Uniform circular motion involves constant speed but not constant velocity, since the direction of motion changes continuously.

Ans.3. C. Complete reflection of light back into the denser medium when angle of incidence exceeds the critical angle. Total internal reflection never occurs when light goes from rarer to a denser medium.

Ans.4. B. Decreasing the angle of the incline reduces the component of weight acting down the plane, thus reducing the net decelerating force. Along the plane, the component of weight acting opposite the upward motion is $mg\sin \theta$, and the frictional force is μmgcosθ.

Ans.5. C. The angle between current direction and field is ${90}^{\circ }$when the conductor is perpendicular to the magnetic field, $\theta ={90}^{\circ }$ and $\sin {90}^{\circ }=1$, yielding the greatest possible force for given $B$, $I$, and $L$ 

Ans.6. D. D. Increase in ${\text{CO}}_2$ and ${\text{H}}^{+}$concentration in tissues. This combination of changes is characteristic of actively metabolising tissues and leads to a rightward shift of the oxyhaemoglobin dissociation curve. High ${\text{CO}}_2$ levels and increased ${\text{H}}^{+}$(lower pH) result from cellular respiration and acid production.

Ans.7. B. Dilute the solution and measure the new pH

Ans.8. C. Relative lowering of vapour pressure, boiling point elevation, freezing point depression, osmotic pressure.

Ans.9. C. $r_3=9r_1$ From Bohr’s formula for hydrogen-like atoms, $r_n=a_0{\displaystyle \frac{n^2}{Z}}$

Ans.10. C. Propanone, Among the isomers of $C_3{H}_{6}O$, propanone is the only one that is a methyl ketone, so it forms a hydrazone with 2,4-DNP and gives the characteristic yellow iodoform precipitate.

Ans.11. B. Cactus varieties in different deserts of the world. The similarity among cacti and other desert succulents arises from convergent evolution: independent origin of similar traits in unrelated groups, not from a single ancestral species radiating into multiple forms within a region.

Ans.12. A. ATP binding → Cross-bridge detachment → Cross-bridge formation → Power stroke. This order reflects the biochemical cycle in sarcomere contraction, where ATP is essential for both detachment and re-cocking of the myosin head. Without ATP, cross-bridges remain locked, as seen in rigor mortis.

Ans.13. B. ABO blood group system. In codominance, both alleles contribute observable traits simultaneously, like A and B antigens in AB blood group, without one overshadowing the other.

Ans. 14. A. It is semiconservative and bidirectional from a single origin of replication. Primase lays down short RNA primers complementary to the template strand, which are then extended by DNA polymerase III. Later, DNA polymerase I replaces the RNA segments with DNA, and DNA ligase seals nicks, maintaining the semiconservative, bidirectional nature of replication.

Ans.15. C.  Meiosis involves two successive divisions but only one round of DNA replication. Meiosis I reduces the chromosome number from diploid to haploid by separating homologous chromosomes, and meiosis II separates sister chromatids without further DNA replication. (NEET UG questions often ask you to compare meiosis and mitosis precisely on these points.)

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