NEET 2023 Manipur – PYQ Practice

On the basis of electrical conductivity, which one of the following material has the smallest resistivity?

According to Gauss law of electrostatics, electric flux through a closed surface depends on :

Which of the following statement is not true?

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction of fields, then the electron:

A p-type extrinsic semiconductor is obtained when Germanium is doped with:

The wavelength of Lyman series of hydrogen atom appears in:

The de Broglie wavelength associated with an electron, accelerated by a potential difference of 81 V is given by:

The maximum power is dissipated for an ac in a/an:

The maximum kinetic energy of the emitted photoelectrons in photoelectric effect is independent of:

Two particles A and B initially at rest, move towards each other under mutual force of attraction. At an instance when the speed of A is v and speed of B is 3v, the speed of centre of mass is :

An object is mounted on a wall. Its image of equal size is to be obtained on a parallel wall with the help of a convex lens placed between these walls. The lens is kept at distance x in front of the second wall. The required focal length of the lens will be :

Incorrect set of quantum numbers from the following is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Ionisation enthalpy increases along each series of the transition elements from left to right. However, small variations occur. Reason (R) : There is corresponding increase in nuclear charge which accompanies the filling of electrons in the inner d-orbitals. In the light of the above statements, choose the most appropriate answer from the options given below :

Which one of the following represents all isoelectronic species ?

Which of the following is correctly matched?

Which one of the following statements is incorrect related to Molecular Orbital Theory?

An acidic buffer is prepared by mixing :

The correct options for the rate law that corresponds to overall first order reaction is

Which amongst the following compounds/species is least basic?

Which of the following forms a set of complex and a double salt, respectively?

Which amongst the following compounds will show geometrical isomerism?

The correct sequence given below containing neutral, acidic, basic and amphoteric oxide each, respectively, is

Choose the correct sequence of reagents in the conversion of 4-nitrotoluene to 2-bromotoluene.

Given below are two statements: Statement I : In an organic compound, when inductive and electromeric effects operate in opposite directions, the inductive effect predominates. Statement II : Hyperconjugation is observed in o-xylene. In the light of the above statements, choose the correct answer from the options given below :

The correct option for a redox couple is:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Ionisation enthalpies of early actinoids are lower than for early lanthanoids. Reason (R) : Electrons are entering 5f orbitals in actinoids which experience greater shielding from nuclear charge. In the light of the above statements, choose the correct answer from the options given below :

Which amongst the following aqueous solution of electrolytes will have minimum elevation in boiling point? Choose the correct option :-

In Calotropis, aestivation is :

How many times decarboxylation occurs during each TCA cycle?

The dissolution of synaptonemal complex occurs during :

Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after :

In 'rivet popper hypothesis', Paul Ehrlich compared the rivets in an airplane to :

In a pea flower, five petals are arranged in a specialized manner with one posterior, two lateral and two anterior. These are named as ___________, __________ and _________ respectively.

In which of the following sets of families, the pollen grains are viable for months?

Transfer of pollen grains from anther to stigma of another flower of same plant is known as :

The phenomenon which is influenced by auxin and also played a major role in its discovery :

The transverse section of a plant part showed polyarch, radial and exarch xylem, with endodermis and pericycle. The plant part is identified as :

The last chromosome sequenced in Human Genome Project was:

The amount of nutrients such as carbon, nitrogen, potassium and calcium present in the soil at any given time is referred to as :

Plants offer rewards to animals in the form of pollen and nectar and the animals facilitate the pollination process. This is an example of :

The species of plants that plays a vital role in controlling the relative abundance of other species in a community is called _________.

Inulin is a polymer of :

Thermostable DNA polymerase used in PCR was isolated from :

Name the component that binds to the operator region of an operon and prevents RNA polymerase from transcribing the operon.

A heterozygous pea plant with violet flowers was crossed with homozygous pea plant with white flower. Violet is dominant over white. Which one of the following represents the expected combinations among 40 progenies formed?

Fatty acids are connected with the respiratory pathway through :

Ligation of foreign DNA at which of the following site will result in loss of tetracyclin resistance of pBR322 :

Which classes of algae possess pigment fucoxanthin and pigment phycoerythrin, respectively ?

In which disorder change of single base pair in the gene for beta globin chain results in change of glutamic acid to valine ?

For chemical defence against herbivores, Calotropis has :

Consider the following tissues in the stelar region of a stem showing secondary growth. (A) Primary xylem (B) Secondary xylem (C) Primary phloem (D) Secondary phloem Arrange these in the correct sequence of their position from pith towards corts.

Which out of the following statements is incorrect?

In angiosperms the correct sequence of events in formation of female gametophyte in the ovule is : (A) 3 successive free nuclear divisions functional megaspore. (B) Degeneration of 3 megaspores. (C) Meiotic division in megaspore mother cell. (D) Migration of 3 nuclei towards each pole. (E) Formation of wall resulting in seven celled embryosac. Choose the correct answer from the options given below :

Which of the following statements is true?

Which of the following statement is incorrect about Agrobacterium tumifaciens?

Consider the following plant tissues : (A) Axillary buds (B) Fascicular vascular cambium (C) Interfascicular cambium (D) Cork cambium (E) Intercalary meristem Identify the lateral meristems among the above.

Given below are two statements : Statement I : The process of copying genetic information from one strand of the DNA into RNA is termed as transcription. Statement II : A transcription unit in DNA is defined primarily by the three regions in the DNA i.e., a promotor, the structural gene and a terminator. In the light of the above statements, choose the correct answer from the options given below :

During which stages of mitosis and meiosis, respectively does the centromere of each chromosome split ?

Which of the following statements is not correct ?

Which of the following sexually transmitted infections are completely curable ?

Which of the following is not a secondary metabolite?

House fly belongs to _____ family.

Select incorrect statement, regarding chemical structure of insulin.

Which one of the following is the quiescent stage of cell cycle?

Given below are two statements : Statement I : RNA being unstable, mutate at a faster rate. Statement II : RNA can directly code for synthesis of proteins hence can easily express the characters. In the light of the above statements, choose the correct answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A) : Ascending limb of loop of Henle is impermeable to water and allows transport of electrolytes actively or passively. Reason (R) : Dilution of filtrate takes place due to efflux of electrolytes in the medullary fluid. In the light of the above statements, choose the correct answer from the options given below :

The Cockroach is :

Which of the following statements are correct with respect to the hormone and its function? (A) Thyrocalcitonin (TCT) regulates the blood calcium level. (B) In males, FSH and androgens regulate spermatogenesis. (C) Hyperthyroidism can lead to goitre. (D) Glucocorticoids are secreted in Adrenal Medulla. (E) Parathyroid hormone is regulated by circulating levels of sodium ions. Choose the most appropriate answer from the options given below :

Which of the following is/are cause(s) of biodiversity losses ?

Which of the following can act as molecular scissors?

Select the correct statements about sickle cell anaemia. (A) There is a change in gene for beta globin. (B) In the beta globin, there is valine in the place of Lysine. (C) It is an example of point mutation. (D) In the normal gene U is replaced by A. Choose the correct answer from the options given below :

Given below are two statements : Statement I :- Intra Cytoplasmic Sperm Injection (ICSI) is another specialised procedure of in-vivo fertilisation. Statement II :- Infertility cases due to inability of the male partner to inseminate female can be corrected by artificial insemination (AI). In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements : Statement I :- Goblet cells are unicellular glands. Statement II :- Earwax is the secretion of exocrine gland. In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements regarding oogenesis: Statement I :- The primary follicles get surrounded by more layers of granulosa cells, a theca and shows fluid filled cavity antrum. Now it is called secondary follicle. Statement II :- Graffian follicle ruptures to release the secondary oocyte from the ovary by the process called ovulation. In the light of the above statements, choose the correct answer from the options given below:

If there are 250 snails in a pond, and within a year their number increases to 2500 by reproduction. What should be their birth rate per snail per year ?

Which one of the following acts as an inducer for lac operon ?

'X' and 'Y' are the components of Binomial nomenclature. This naming system was proposed by 'Z' :

Which of the following statements are correct ? (A) Reproductive health refers to total well-being in all aspects of reproduction. (B) Amniocentesis is legally banned for sex determination in India. (C) "Saheli" – a new oral contraceptive for females was developed in collaboration with ICMR (New Delhi). (D) Amniocentesis is used to determine genetic disorders and survivability of foetus. Choose the most appropriate answer from the options given below :

Given below are two statements : Statement I :- In bacteria, the mesosomes are formed by the extensions of plasma membrane. Statement II :- The mesosomes, in bacteria, help in DNA replication and cell wall formation. In the light of the above statements, choose the most appropriate answer from the options given below:

Select correct sequence of substages of Prophase-I of Meiotic division : (A) Zygotene (B) Pachytene (C) Diakinesis (D) Leptotene (E) Diplotene Choose the correct answer from the options given below :

Brainstem of human brain consists of :

Identify the fossil of man who showed the following characteristics. (A) Brain capacity of 1400 cc (B) Used hides to protect their body (C) Buried their dead bodies In the light of above statements, choose the correct answer from the options given below :

With reference to Hershey and Chase experiments. Select the correct statements. (A) Viruses grown in the presence of radioactive phosphorus contained radioactive DNA. (B) Viruses grown on radioactive sulphur contained radioactive proteins. (C) Viruses grown on radioactive phosphorus contained radioactive protein. (D) Viruses grown on radioactive sulphur contained radioactive DNA. (E) Viruses grown on radioactive protein contained radioactive DNA. Choose the most appropriate answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : A person goes to high altitude and experiences "Altitude Sickness" with symptoms like breathing difficulty and heart palpitations. Reason (R) : Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen. In the light of the above statements, choose the correct answer from the options given below :

The salient features of genetic code are : (A) The code is palindromic (B) UGA act as initiator codon (C) The code is unambiguous and specific (D) The code is nearly universal Choose the most appropriate answer from the options given below :

Given below are two statements : Statement I : Parathyroid hormone acts on bones and stimulates the process of bone resorption. Statement II : Parathyroid hormone along with Thyrocalcitonin plays a significant role in carbohydrate metabolism. In the light of the above statements, choose the correct answer from the options given below :

Select the correct statements : (A) Platyhelminthes are triploblastic pseudocoelomate and bilaterally symmetrical organisms. (B) Ctenophores reproduce only sexually and fertilization is external. (C) In tapeworm, fertilization is internal but sexes are not separate. (D) Ctenophores are exclusively marine, diploblastic and bioluminescent organisms. (E) In sponges, fertilization is external and development is direct. Choose the correct answer from the options given below :

Which of the following statements are correct with respect of Golgi apparatus ? (A) It is the important site of formation of glycoprotein and glycolipids. (B) It produces cellular energy in the form of ATP. (C) It modifies the protein synthesized by ribosomes on ER. (D) It facilitates the transport of ions. (E) It provides mechanical support. Choose the most appropriate answer from the options given below :

Given below are two statements : Statement I : In cockroach, the forewings are transparent and prothoracic in origin. Statement II : In cockroach, the hind wings are opaque, leathery and mesothoracic in origin. In the light of the above statements, choose the correct answer from the options given below :

Select the correct statement/s with respect to mechanism of sex determination in Grasshopper. (A) It is an example of female heterogamety. (B) Male produces two different types of gametes either with or without X chromosome. (C) Total number of chromosomes (autosomes and sex chromosomes) is same in both males and females. (D) All eggs bear an additional X chromosome besides the autosomes. Choose the correct answer from the options given below :