NEET 2024 (Re-Examination) – PYQ Practice

Given below are two statements: Statement I : Image formation needs regular reflection and/or refraction. Statement II : The variety in colour of objects we see around us is due to the constituent colours of the light incident on them. In the light of the above statements, choose the most appropriate answer from the options given below :

A particle executing simple harmonic motion with amplitude A has the same potential and kinetic energies at the displacement

Water is used as a coolant in a nuclear reactor because of its

When the output of an OR gate is applied as input to a NOT gate, then the combination acts as a

The electromagnetic radiation which has the smallest wavelength are

The equilibrium state of a thermodynamic system is described by A. Pressure B. Total heat C. Temperature D. Volume E. Work done Choose the most appropriate answer from the options given below.

Baeyer's reagent is :

Which of the following molecules has "NON ZERO" dipole moment value?

Which indicator is used in the titration of sodium hydroxide against oxalic acid and what is the colour change at the end point?

From the following select the one which is not an example of corrosion.

Choose the correct statement for the work done in the expansion and heat absorbed or released when 5 litres of an ideal gas at 10 atmospheric pressure isothermally expands into vacuum until volume is 15 litres :

Which of the following set of ions act as oxidising agents?

Select the incorrect reaction among the following :

The UV-visible absorption bands in the spectra of lanthanoid ions are 'X', probably because of the excitation of electrons involving 'Y'. The 'X' and 'Y', respectively, are : Narrow and d and f orbitals

Ethylene diaminetetraacetate ion is a/an:

Identify the incorrect statement from the following :

Which of the following is not an ambidentate ligand?

The compound that does not undergo Friedel-Crafts alkylation reaction but gives a positive carbylamine test is :

Given below are two statements : Statement I : Glycogen is similar to amylose in its structure. Statement II : Glycogen is found in yeast and fungi also. In the light of the above statements, choose the correct answer from the options given below :

Identify the incorrect statement.

Methyl group attached to a positively charged carbon atom stabilizes the carbocation due to

Which of the following simple tissues are commonly found in the fruit walls of nuts and pulp of pear?

In a chromosome, there is a specific DNA sequence, responsible for initiating replication. It is called as:

Given below are two statements: Statement I: When many alleles of a single gene govern a character, it is called polygenic inheritance. Statement II: In Polygenic inheritance, the effect of each allele is additive. In the light of the above statements, choose the correct answer from the options given below.

Which part of the ovule stores reserve food materials?

Which one of the following is not found in Gymnosperms?

Which one of the following is not included under in-situ conservation?

Given below are two statements: Statement I : The Indian Government has set up GEAC, which will make decisions regarding the validity of GM research. Statement II : Biopiracy is the term used to refer to the use of bio-resources by native people. In the light of the above statements, choose the correct answer from the options given below :

Pollen grains remain preserved as fossils due to the presence of :

Identify the incorrect pair :

Which of the following is the correct match?

Given below are two statements regarding RNA polymerase in prokaryotes. Statement I : In prokaryotes, RNA polymerase is capable of catalysing the process of elongation during transcription. Statement II : RNA polymerase associate transiently with ‘Rho’ factor to initiate transcription. In the light of the above statements, choose the correct answer from the options given below :

Which of the following is a nucleotide?

Which of the following helps in maintenance of the pressure gradient in sieve tubes?

Mesosome in a cell is a :

Cryopreservation technique is used for :

Given below are two statements: Statement I: In eukaryotes there are three RNA polymerases in the nucleus in addition to the RNA polymerase found in the organelles. Statement II: All the three RNA polymerases in eukaryotic nucleus have different roles. In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements: Statement I: Failure of segregation of chromatids during cell cycle resulting in the gain or loss of whole set of chromosome in an organism is known as aneuploidy. Statement II: Failure of cytokinesis after anaphase stage of cell division results in the gain or loss of a chromosome is called polyploidy. In the light of the above statements, choose the correct answer from the options given below:

Recombination between homologous chromosomes is completed by the end of

Ligases is a class of enzymes responsible for catalysing the linking together of two compounds. Which of the following bonds is not catalysed by it?

F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxin was supplied with one of the following except :

Given below are some statements about plant growth regulators. A. All GAs are acidic in nature. B. Auxins are antagonists to GAs. C. Zeatin was isolated from coconut milk. D. Ethylene induces flowering in Mango. E. Abscisic acid induces parthenocarpy. Choose the correct set of statements from the options given below :

Identify the incorrect statement related to gel electrophoresis.

Which of the following examples show monocarpellary, unilocular ovary with many ovules? A. Sesbania B. Brinjal C. Indigofera D. Tobacco E. Asparagus Choose the correct answer from the options given below :

Given below are two statements : Statement I: In the lac operon, the z gene codes for beta-galactosidase which is primarily responsible for the hydrolysis of lactose into galactose and glucose. Statement II: In addition to lactose, glucose or galactose can also induce lac operon. In the light of the above statements, choose the correct answer from the options given below :

Given below are two statements: Statement I: In a dicotyledonous leaf, the adaxial epidermis generally bears more stomata than the abaxial epidermis. Statement II: In a dicotyledonous leaf, the adaxially placed palisade parenchyma is made up of elongated cells, which are arranged vertically and parallel to each other. In the light of the above statements, choose the correct answer from the options given below:

Which of the following are not fatty acids? A. Glutamic acid B. Arachidonic acid C. Palmitic acid D. Lecithin E. Aspartic acid Choose the correct answer from the options given below :

Which one of the following products diffuses out of the chloroplast during photosynthesis?

Recombinant DNA molecule can be created normally by cutting the vector DNA and source DNA respectively with:

Which one of the following is not a limitation of ecological pyramids?

The Bt toxin in genetically engineered Bt cotton kills the pest by:

Which of the following graphs depicts the effect of substrate concentration on velocity of enzyme catalysed reaction?

When will the population density increase, under special conditions? When the number of :

When a tall pea plant with round seeds was selfed, it produced the progeny of : (a) Tall plants with round seeds and (b) Tall plants with wrinkled seeds. Identify the genotype of the parent plant.

Following are the steps involved in action of toxin in Bt. Cotton A. The inactive toxin converted into active form due to alkaline pH of gut of insect. B. Bacillus thuringiensis produce crystals with toxic insecticidal proteins. C. The alkaline pH solubilises the crystals. D. The activated toxin binds to the surface of midgut cells, creates pores and causes death of the insect. E. The toxin proteins exist as inactive protoxins in bacteria. Choose the correct sequence of steps from the options given below:

Enzymes that catalyse the removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds, are known as :

Which of the following statements is correct about the type of junction and their role in our body?

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: During menstrual cycle, the ovulation takes place approximately on 14th day. Reason R: Rapid secretion of LH in the middle of menstrual cycle induces rupture of Graafian follicle and thereby the release of ovum. In the light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements: Statement I: Antibiotics are chemicals produced by microbes that kill other microbes. Statement II: Antibodies are chemicals formed in body that eliminate microbes. In the light of the above statements, choose the most appropriate answer from the options given below.

Arrange the following parts in human Mammary gland, traversing the route of milk ejection. A. Mammary duct B. Lactiferous duct C. Mammary alveolus D. Ampulla E. Mammary tubule Choose the correct answer from the options given below:

Which of the following is/are present in female cockroach? A. Collateral gland B. Mushroom gland C. Spermatheca D. Anal style E. Phallic gland Choose the most appropriate answer from the options given below:

Open Circulatory system is present in :

In which of the following connective tissues, the cells secrete fibres of collagen or elastin? A. Cartilage B. Bone C. Adipose tissue D. Blood E. Areolar tissue Choose the most appropriate answer from the options given below :

Which of the following pairs is an incorrect match?

Diuresis is prevented by:

Following is the list of STDs. Select the diseases which are not completely curable. A. Genital warts B. Genital herpes C. Syphilis D. Hepatitis-B E. Trichomoniasis Choose the correct answer from the options given below:

What is the correct order (old to recent) of periods in Paleozoic era?

'Lub' sound of Heart is caused by the _________.

Aneuploidy is a chromosomal disorder where chromosome number is not the exact copy of its haploid set of chromosomes, due to : A. Substitution B. Addition C. Deletion D. Translocation E. Inversion Choose the most appropriate answer from the options given below :

Given below are two statements : Statement I : RNA interference takes place in all Eukaryotic organisms as method of cellular defense. Statement II : RNAi involves the silencing of a specific mRNA due to a complementary single-stranded RNA molecule that binds and prevents translation of mRNA In the light of the above statements, choose the correct answer from the options given below.

Identify the wrong statements : A. Erythropoietin is produced by juxtaglomerular cells of the kidney B. Leydig cells produce Androgens C. Atrial Natriuretic factor, a peptide hormone is secreted by the seminiferous tubules of the testes D. Cholecystokinin is produced by gastrointestinal tract E. Gastrin acts on intestinal wall and helps in the production of pepsinogen Choose the most appropriate answer from the options given below :

Following are the steps involved in the process of PCR. A. Annealing B. Amplification (~1 billion times) C. Denaturation D. Treatment with Taq polymerase and deoxynucleotides E. Extension Choose the correct sequence of steps of PCR from the options given below :

Given below are two statements: Statements I: Concentrated urine is formed due to counter current mechanism in nephron. Statement II: Counter current mechanism helps to maintain osmotic gradient in the medullary interstitium. In the light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements : Statement I : Concentrically arranged cisternae of Golgi complex are arranged near the nucleus with distinct convex cis or maturing and concave trans or forming face. Statement II : A number of proteins are modified in the cisternae of Golgi complex before they are released from cis face. In the light of the above statements, choose the correct answer from the option given below.

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Members of subphylum vertebrata possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult. Reason R: Thus all chordates are vertebrates not all vertebrates are chordates. In the light of the above statements choose the correct answer from the option given below.