NEET 2019 Biology Questions

Which of the following statements is not correct?

Which of the following pair of organelles does not contain DNA?

The shorter and longer arms of a submetacentric chromosome are referred to as

Which of the following is an incorrect statement?

The main difference between active and passive transport across cell membrane is :

The concept of “Omnis cellula-e cellula” regarding cell division was first proposed by

Non-membranous nucleoplasmic structures in nucleus are the site for active synthesis of

Which of the following nucleic acids is present in an organism having 70S ribosomes only ?

Which of the following cell organelles is present in the highest number in secretory cells ?

Which of the following statements regarding mitochondria is incorrect?

Match Column-I with Column-II: Column I (a) Golgi apparatus (b) Lysosomes (c) Vacuoles (d) Ribosomes Column II (i) Synthesis of protein (ii) Trap waste and excretory products (iii) Formation of glycoproteins and glycolipids (iv) Digesting biomolecules Choose the right match from the options given below:

Which of the following statements about methanogens is not correct?

Which of the following statements is correct

Match Column I with Column II: Column I (a) Saprophyte (b) Parasite (c) Lichens (d) Mycorrhiza Column II (i) Symbiotic association of fungi with plant roots (ii) Decomposition of dead organic materials (iii) Living on living plants or animals (iv) Symbiotic association of algae and fungi Choose the correct answer from the options given below:

Which of the following is a correct statement?

Match the organisms in Column I with their habitats in Column II: Column I (a) Halophiles (b) Thermoacidophiles (c) Methanogens (d) Cyanobacteria Column II (i) Hot springs (ii) Aquatic environment (iii) Guts of ruminants (iv) Salty area Select the correct answer from the options given below:

Which of the following statements is incorrect?

Which of the following statements is incorrect?

Mad cow disease in cattle is caused by an organism which has :-

Select the incorrect statement:

How does steroid hormone influence the cellular activities?

Which of the following glucose transporters is insulin-dependent?

Identify A, B and C in the diagramatic representation of the mechanism of hormone action. Select the correct option from the following. (A diagram of the mechanism of hormone action is shown, depicting a hormone binding to a membrane-bound receptor on the target cell, with labels A, B and C pointing respectively to the hormone, the receptor, and the intracellular signalling molecule generated; identify what each of A, B and C represents.)

Match the following hormones with the respective disease. Column I (a) Insulin (b) Thyroxin (c) Corticoids (d) Growth Hormone Column II (i) Addison's disease (ii) Diabetes insipidus (iii) Acromegaly (iv) Goitre (v) Diabetes mellitus Select the correct option

Which of the following conditions will stimulate parathyroid gland to release parathyroid hormone?

Which of the following hormones is responsible for both the milk ejection reflex and the foetal ejection reflex?

Artificial light, extended work-time and reduced sleep-time disrupt the activity of

Which of the following statements is correct?

Match the items in Column-I with those in Column-II: Column-I (a) Podocytes (b) Protonephridia (c) Nephridia (d) Renal calculi Column-II (i) Crystallised oxalates (ii) Annelids (iii) Amphioxus (iv) Filtration slits Select the correct option from the following

Use of an artificial kidney during hemodialysis may result in : (a) Nitrogenous waste build-up in the body (b) Non-elimination of excess potassium ions (c) Reduced absorption of calcium ions from gastro-intestinal tract (d) Reduced RBC production Which of the following options is the most appropriate?

Match the following parts of a nephron with their function: (a) Descending limb of Henle's loop (b) Proximal convoluted tubule (c) Ascending limb of Henle's loop (d) Distal convoluted tubule (i) Reabsorption of salts only (ii) Reabsorption of water only (iii) Conditional reabsorption of sodium ion and water (iv) Reabsorption of ion, water and organic nutrients. Select the correct option from the following

Which of the following factors is responsible for the formation of concentrated urine?

Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following:

Phloem in gymnosperms lacks:

Which of the following is an incorrect statement?

In the dicot root the vascular cambium originates from :-

Regeneration of damaged growing grass following grazing is largely due to :-

Match the Column-I with Column-II: Column-I (a) P-wave (b) QRS complex (c) T-wave (d) Reduction in the size of T-wave Column-II (i) Depolarisation of ventricles (ii) Repolarisation of ventricles (iii) Coronary ischemia (iv) Depolarisation of atria (v) Repolarisation of atria Select the correct option:

All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemakar?

A specialised nodal tissue embedded in the lower corner of the right atrium, close to Atrio-ventricular septum, delays the spreading of impulses to heart apex for about 0.1 sec. The delay allows.

What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?

Which of the following statements is incorrect?

Prosthetic groups differ from co-enzymes in that :-

Concanavalin A is

Purines found both in DNA and RNA are

"Ramachandran plot" is used to confirm the structure of :-

Consider the following statement : (A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. (B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme. Select the correct option.

Which of the following statements is incorrect?

Which out of the following statements is incorrect?

In Hatch and Slack pathway, the primary CO2 acceptor is -

One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:

Match the following organisms with their respective characteristics : Column I A. Pila B. Bombyx C. Pleurobrachia D. Taenia Column II i. Flame cells ii. Comb plates iii. Radula iv. Malpighian tubules Select the correct option from the following :

Which of the following animals are true coelomates with bilateral symmetry?

Match the following genera with their respective phylum: Column-I (a) Ophiura (b) Physalia (c) Pinctada (d) Planaria Column-II (i) Mollusca (ii) Platyhelminthes (iii) Echinodermata (iv) Coelenterata Select the correct option:

Consider following features (a) Organ system level of organisation (b) Bilateral symmetry (c) True coelomates with segmentation of body Select the correct option of animal groups which possess all the above characteristics

Select the correct option.

Which of the following muscular disorders is inherited?

Which of the following diseases is an autoimmune disorder?

Match the following joints with the bones involved: List I (a) Gliding joint (b) Hinge joint (c) Pivot joint (d) Saddle joint List II (i) Between carpal and metacarpal of thumb (ii) Between Atlas and Axis (iii) Between the carpals (iv) Between Humerus and Ulna Select the correct option from the following:

Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by

Where is respiratory electron transport system (ETS) located in plants ?

Respiratory Quotient (RQ) value of tripalmitin is

Which of the following statements is incorrect?

Placentation in which ovules develop on the inner wall of the ovary or in peripheral part, is (NEET 2019)

Which of the following shows whorled phyllotaxy ? (NEET 2023 (Odisha))

Match the placental types (column-I) with their examples (column-II). Column-I: (a) Basal, (b) Axile, (c) Parietal, (d) Free central. Column-II: (i) Mustard, (ii) China rose, (iii) Dianthus, (iv) Sunflower. (NEET 2023 (Odisha))

Bicarpellary ovary with obliquely placed septum is seen in :- (NEET 2023 (Odisha))

Select the correct statement.

The maximum volume of air a person can breathe in after a forced expiration is known as :

Tidal Volume and Expiratory Reserve Volume of an athlete is 500 mL and 1000 mL, respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?

Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to

Cell in G0 phase :

The correct sequence of phases of cell cycle is :

After meiosis I, the resultant daughter cells have

Crossing over takes place between which chromatids and in which stage of the cell cycle ?

Which of the following statements is true?

Select the correct statement:

Which of the following statements is correct?

From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in :

The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in

Match the following structures with their respective location in organs. List I A. Crypts of Lieberkuhn B. Glisson's Capsule C. Islets of Langerhans D. Brunner's Glands List II I. Pancreas II. Duodenum III. Small intestine IV. Liver Select the correct option from the following:

Match the following cell structure with its characteristic feature: List I (a) Tight junctions (b) Adhering junctions (c) Gap junctions (d) Synaptic junctions List II (i) Cement neighbouring cells together to form a sheet (ii) Transmit information through chemicals to another cell (iii) Establish a barrier to prevent leakage of fluid across epithelial cells (iv) Cytoplasmic channels to facilitate communication between adjacent cells Select the correct option from the following:

Which of the following is against the rules of ICBN? (NEET-2019 Odisha)

Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus: (NEET-2019)

Which of the following statements is not correct?

It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

Which of the following statements is not correct?

Which of the following statements about the lac-operon is correct?

Match the following RNA polymerase with their transcribed products : Column I (a) RNA polymerase I (b) RNA polymerase II (c) RNA polymerase III Column II (i) tRNA (ii) rRNA (iii) hnRNA Select the correct option from the following

From the following, identify the correct combination of salient features of Genetic Code

Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology?

Under which of the following conditions will there be no change in the reading frame of following mRNA? 5'AACAGCGGUGCUAUU3'

Which scientist experimentally proved that DNA is the sole genetic material in bacteriophage ?

What will be the sequence of mRNA produced by the following stretch of DNA ? 3'ATGCATGCATGCATG5' TEMPLATE STRAND 5'TACGTACGTACGTAC3' CODING STRAND

Purines found both in DNA and RNA are

Which of the following nucleic acids is present in an organism having 70S ribosomes only ?

Expressed Sequence Tags (ESTs) refers to :

Expressed Sequence Tags (ESTs) refers to

What initiation and termination factors are involved in transcription in Eukaryotes ?

In the process of transcription in Eukaryotes, the RNA polymerase I transcribes :-

Match the following genes of the Lac operon with their respective products : Column-I (a) i gene (b) z gene (c) a gene (d) y gene Column-II (i) β-galactosidase (ii) Permease (iii) Repressor (iv) Transacetylase Select the correct option.

Given below are four statements pertaining to separation of DNA fragments using gel electrophoresis. Identify the incorrect statements. (a) DNA is negatively charged molecule and so it is loaded on gel towards the Anode terminal (b) DNA fragments travel along the surface of the gel whose concentration does not affect movement of DNA. (c) Smaller the size of DNA fragment larger is the distance it travels through it. (d) Pure DNA can be visualized directly by exposing UV radiation. Choose correct answer from the options given below

Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?

Match the following enzymes with their functions : (a) Restriction endonuclease (i) Joins the DNA fragements (b) Restriction exonuclease (ii) Extends primers on genomic DNA template (c) DNA ligase (iii) Cuts DNA at specific position (d) Taq polymerase (iv) Removes nucleotides from the ends of DNA Select the correct option from the following

Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement.

An enzyme catalysing the removel of nucleotides from ends of DNA is:

DNA precipitation out of a mixture of biomolecules can be achieved by treatment with

The two antibiotic resistance genes on vector pBR322 are for

Which or the following statements is incorrect?

A selectable marker is used to:

The production of gametes by the parents, the formation of zygotes, the F1 and F2 plants, can be understood using

The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by:

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following:

In a marriage between male with blood group A and female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of parents?

In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?

The production of gametes by the parents, formation of zygotes, the F1 and F2 plants can be understood from a diagram called

What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia, and is sterile?

Crossing over takes place between which chromatids and in which stage of the cell cycle?

Match the items of column I with column II: Column I: (a) XX-XO method of sex determination (b) XX-XY method of sex determination (c) Karyotype-45 (d) ZW-ZZ method of sex determination Column II: (i) Turner's syndrome (ii) Female heterogametic (iii) Grasshopper (iv) Female homogametic Select the correct option from the following:

Which of the following statements is not true ?

Match the hominids with their correct brain size : (a) Homo habilis - (i) 900 cc (b) Homo neanderthalensis - (ii) 1350 cc (c) Homo erectus - (iii) 650-800 cc (d) Homo sapiens - (iv) 1400 cc Select the correct option.

In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weight from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place?

A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?

In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as

A population of a species invades a new area. Which of the following condition will lead to Adaptive Radiation ?

Variations caused by mutation, as proposed by Hugo de Vries are

Which of the following statements is correct about the origin and evolution of men ?

Drug called 'Heroin' is synthesized by

Which of the following immune responses is responsible for rejection of kidney graft?

Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.

Colostrum the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the new born infants because it contains :

Humans have acquired immune system that produces antibodies to neutralize pathogens. Still innate immune system is present at the time of birth because it

Which of the following diseases is an autoimmune disorder?

Coca alkaloid or cocaine is obtained from:

What type of pollination takes place in Vallisneria?

In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as (NEET 2019)

What is the fate of the male gametes discharged in the synergid? (NEET 2019)

Persistent nucellus in the seed is known as

In which one of the following, both autogamy and geitonogamy are prevented?

Which one of the following statements regarding post-fertilization development in flowering plants is incorrect? (1) Ovary develops into fruit (2) Zygote develops into embryo (3) Central cell develops into endosperm (4) Ovules develop into embryo sac (NEET 2019)

Which is the most common type of embryo sac in angiosperms ?

Which of the following statements about methanogens is not correct?

Select the correct group of biocontrol agents.

Match the following organisms with the products they produce: Column-I (a) Lactobacillus (b) Saccharomyces cerevisiae (c) Aspergillus niger (d) Acetobacter aceti Column-II (i) Cheese (ii) Curd (iii) Citric Acid (iv) Bread (v) Acetic acid Choose the correct option.

Which of the following can be used as a biocontrol agent in the treatment of plant disease?

Pinus seed cannot germinate and establish without fungal association. This is because :

Which of the following is a commercial blood cholesterol lowering agent?

Select the incorrect statement:

Colostrum the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the new born infants because it contains : (NEET 2019)

Select the correct sequence for transport of sperm cells in male reproductive system.

Which of the following hormones is responsible for both the milk ejection reflex and the foetal ejection reflex ?

No new follicles develop in the luteal phase of the menstrual cycle because

Extrusion of second polar body from egg nucleus occurs :

Which of the following is the most important cause of animals and plants being driven to extinction?

Which of the following is the most important cause for animals and plants being driven to extinction?

Which one of the following is not a method in situ conservation of biodiversity?

Exploration of molecular, genetic and species level diversity for novel products of economic importance is known as:

Decline in the population of indian native fishes due to introduction of Clarias gariepinus in river Yamuna can be categoriesd as

The Earth Summit held in Rio de Janeiro in 1992 was called

Which of the following is a correct statement? (NEET Odisha)

Select the hormone-releasing Intra-Uterine Devices.

Which of the following contraceptive methods do involve a role of hormone? (NEET 2019)

Which of the following sexually transmitted diseases do not specifically affect reproductive organs? (NEET Odisha)

Which of the following sexually transmitted diseases is not completely curable? (NEET 2019)

Which of the following statements is not correct?

What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm? (NEET 2019)

Which of the following is true for Golden rice?

In RNAi, the genes are silenced using: (NEET 2019 (Odisha))

Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technology? (NEET 2019)

Which of the following statements is not correct?

Which of the following ecological pyramids is generally inverted?