List of top Questions asked in NEET (UG)- 2026

The enzyme required for carboxylation in the Calvin cycle is :

How many ATP and $NADPH$ molecules are required to make one molecule of glucose through the Calvin pathway?

Match List I with List II regarding cellular processes and their specific locations within the cell: \begin{center} \begin{tabular}{ll} List I (Process) & List II (Location)
A. Glycolysis & I. Inner mitochondrial membrane
B. ETS & II. Mitochondrial matrix
C. Accumulation of protons & III. Cytoplasm
D. Krebs' cycle & IV. Intermembrane space
\end{tabular} \end{center} Choose the correct answer from the options given below:

Which of the following statements are true with reference to the sex-determination in honeybees?
A. An offspring formed from the union of a sperm and an egg develops as a female (queen or worker).
B. An unfertilized egg develops as a male by parthenogenesis.
C. A male has half the number of chromosomes than that of a female.
D. Males produce sperms by meiosis.
E. Honeybees have a haplodiploid sex-determination system.

Which of the following statements are correct with reference to a transcription unit in DNA? A. A transcription unit in DNA is defined primarily by three regions: promoter, structural gene and terminator.
B. The promoter is said to be located towards the $5'$-end of the structural gene.
C. The promoter is a DNA sequence that provides binding site for RNA polymerase.
D. The promoter defines the template and coding strands.
E. The terminator is located towards the $3'$-end of the coding strand and it defines the end of the process of transcription.

Which of the following statements are correct? A. The Amazon rainforest being cut and cleared for cultivation of soyabeans is an example of habitat loss.
B. Steller's sea cow and passenger pigeon became extinct due to over-exploitation by humans.
C. The Nile perch introduced into Lake Victoria in East Africa helped in population growth of cichlid fish in the lake.
D. Water hyacinth is an invasive species.
E. When a species becomes extinct, the plant and animal species associated with it are not affected.

Match List I with List II regarding the phases of the cell cycle and their activities:

When \(1\ dm^3\) of \(CO_2\) gas is passed over hot coke, the volume of gaseous mixture after complete reaction at STP becomes \(1.4\ dm^3\). The composition of the gaseous mixture at STP is:

Given below are the reactions. Identify the reaction for which \(K_p<K_c\):

In a qualitative analysis, \(Bi^{3+}\) is detected by appearance of precipitate of \(BiO(OH)\). Calculate pH when the following equilibrium exists at \(298K\): \[ BiO(OH)(s)\rightleftharpoons BiO^+(aq)+OH^-(aq) \] \[ K=4\times10^{-10} \] \[ \text{Given: }\log2=0.3010 \]

The correct order of increasing metallic character of \(Na\), \(Be\), \(Mg\), \(Si\) and \(P\) is:

Identify the incorrect statement from the following:

A bulb is rated at \(150\ watt\), converting \(8%\) energy into light. If energy of one photon is \(4.42\times10^{-19}J\), how many photons are emitted by the bulb per second?

Which one of the following is an ambidentate ligand?

Select the reagents that reduce nitriles to primary amines: \[ \text{A. } LiAlH_4 \] \[ \text{B. } Sn+HCl \] \[ \text{C. } H_2-Ni \] \[ \text{D. } Na(Hg)/C_2H_5OH \] \[ \text{E. } Br_2/aq.\ NaOH \]

Consider the following reaction: \[ 2A(g)+B(g)\rightarrow 2D(g) \] \[ \Delta U^\circ=-10\ kJ\ mol^{-1} \] \[ \Delta S^\circ=-44\ J\ K^{-1}mol^{-1} \] at \(298K\). Identify the correct option with \(\Delta G^\circ\) for the reaction and spontaneity of the reaction at \(298K\). \[ R=8.31\ J\ mol^{-1}K^{-1} \]

At a certain temperature \(K\), during a process, \(500\ J\) is absorbed by the system and work of \(200\ J\) is done by the system. Then change in internal energy of the system is:

The correct formal charges on oxygen atoms numbered \(2,1\) and \(3\), respectively, are:

Identify the incorrect statement from the following:

Identify the correct statements. A. Molality of a solution is defined as mass of solute in gram dissolved in solution.
B. Molality of a solution is defined as the number of moles of solute dissolved in \(1\text{ kg}\) of solvent.
C. Aqueous solution of \(\ce{NH4OH}\) and \(\ce{NH4Cl}\) is a basic buffer solution.
D. Solubility of a gas in a liquid increases with increase in pressure.

Given below are two statements. Assertion (A): Molar solubility of a gas in a liquid decreases with increase in pressure at constant temperature. Reason (R): Henry's law describes that at constant temperature, the partial pressure of a gas in vapour phase is directly proportional to the mole fraction of the gas in solution. Choose the most appropriate answer.

At \(298K\), a certain buffer solution contains equal concentrations of \(X^-\) and \(HX\). If \(K_b\) for \(X^-\) is \(10^{-10}\), what is the pH of this buffer solution?

Calculate emf of the half-cell given below: \[ Pt(s)\mid H_2(g,2\text{ atm})\mid HCl(aq,0.02M) \] \[ E^\circ_{H^+/H_2}=0V,\qquad \frac{2.303RT}{F}=0.059 \] \[ \log 2=0.3010 \]

Although \(+3\) oxidation state is most common in lanthanoids, cerium still shows \(+4\) oxidation state because:

Compound \(P\) gives a red-orange precipitate with 2,4-DNP reagent and does not reduce Fehling's reagent. On drastic oxidation with chromic acid, \(P\) gives an aromatic product \(Q\) which produces effervescence on treating with aqueous \(\ce{NaHCO3}\). Compounds \(P\) and \(Q\), respectively, are: