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NEET 2019 — Zoology

All 40 Zoology questions we hold from this paper, of the 176 on the site for this sitting — every option and the answer key. 4 marks each, −1 for a wrong answer.

Zoology

45 questions, one correct option each. +4 for a correct answer, −1 for a wrong one, nothing for a blank.

Q1openHuman Reproduction · Fertilisation, implantation, pregnancy, parturition, lactation

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

  1. A.Natural killer cells
  2. B.Monocytes
  3. C.Macrophages
  4. D.Immunoglobulin A✓

The worked solution is part of a paid pack.

Q2open

Match the following structures with their respective location/organ:

Column IColumn II
(a) Crypts of Lieberkühn(i) Pancreas
(b) Glisson's capsule(ii) Duodenum
(c) Islets of Langerhans(iii) Small intestine
(d) Brunner's glands(iv) Liver
  1. A.(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
  2. B.(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
  3. C.(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)✓
  4. D.(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)

The worked solution is part of a paid pack.

Q3openNeural Control and Coordination · Central nervous system

Which part of the brain is responsible for thermoregulation?

  1. A.Cerebrum
  2. B.Hypothalamus✓
  3. C.Corpus callosum
  4. D.Medulla oblongata

The worked solution is part of a paid pack.

Q4openAnimal Kingdom · Basis of classification

Consider the following features:

(a) Organ-system level of organisation

(b) Bilateral symmetry

(c) True coelomates with segmentation of the body

Select the correct option for the animal groups that possess ALL of the above characteristics:

  1. A.Annelida, Arthropoda and Chordata✓
  2. B.Annelida, Arthropoda and Mollusca
  3. C.Arthropoda, Mollusca and Chordata
  4. D.Annelida, Mollusca and Chordata

The worked solution is part of a paid pack.

Q5openStructural Organisation in Animals · Frog: morphology and anatomy

Select the correct sequence of organs in the alimentary canal of a cockroach, starting from the mouth:

  1. A.Pharynx oesophagus crop gizzard ileum colon rectum✓
  2. B.Pharynx oesophagus gizzard crop ileum colon rectum
  3. C.Pharynx oesophagus gizzard ileum crop colon rectum
  4. D.Pharynx oesophagus ileum crop gizzard colon rectum

The worked solution is part of a paid pack.

Q6openLocomotion and Movement · Disorders

Which of the following muscular disorders is inherited?

  1. A.Tetany
  2. B.Muscular dystrophy✓
  3. C.Myasthenia gravis
  4. D.Botulism

The worked solution is part of a paid pack.

Q7openStructural Organisation in Animals · Animal tissues

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

  1. A.Bile duct and bronchioles
  2. B.Fallopian tubes and pancreatic duct
  3. C.Eustachian tube and salivary duct
  4. D.Bronchioles and Fallopian tubes✓

The worked solution is part of a paid pack.

Q8openBody Fluids and Circulation · Human heart, cardiac cycle and ECG

Match Column I with Column II:

Column IColumn II
(a) P-wave(i) Depolarisation of ventricles
(b) QRS complex(ii) Repolarisation of ventricles
(c) T-wave(iii) Coronary ischaemia
(d) Reduction in the size of the T-wave(iv) Depolarisation of atria
(v) Repolarisation of atria
  1. A.(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)✓
  2. B.(a)-(iv), (b)-(i), (c)-(ii), (d)-(v)
  3. C.(a)-(ii), (b)-(i), (c)-(v), (d)-(iii)
  4. D.(a)-(ii), (b)-(iii), (c)-(v), (d)-(iv)

The worked solution is part of a paid pack.

Q9openEvolution · Natural selection, Hardy–Weinberg, adaptive radiation

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

  1. A.Directional selection
  2. B.Stabilising selection✓
  3. C.Disruptive selection
  4. D.Cyclical selection

The worked solution is part of a paid pack.

Q10openChemical Coordination and Integration · Mechanism of hormone action

How does a steroid hormone influence cellular activities?

  1. A.By changing the permeability of the cell membrane
  2. B.By binding to DNA and forming a gene-hormone complex✓
  3. C.By activating cyclic AMP located on the cell membrane
  4. D.By using aquaporin channels as a second messenger

The worked solution is part of a paid pack.

Q11openBiomolecules · Carbohydrates, lipids, amino acids and proteins

Concanavalin A is:

  1. A.An alkaloid
  2. B.An essential oil
  3. C.A lectin✓
  4. D.A pigment

The worked solution is part of a paid pack.

Q12openBiotechnology: Principles and Processes · Processes: cloning, PCR, bioreactors

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

  1. A.BOD incubator
  2. B.Sludge digester
  3. C.Industrial oven
  4. D.Bioreactor✓

The worked solution is part of a paid pack.

Q13openBiomolecules · Enzymes: mechanism, factors, classification

Consider the following statements:

(A) A coenzyme or metal ion that is tightly bound to an enzyme protein is called a prosthetic group.

(B) A complete, catalytically active enzyme together with its bound prosthetic group is called an apoenzyme.

Select the correct option.

  1. A.Both (A) and (B) are true
  2. B.(A) is true but (B) is false✓
  3. C.Both (A) and (B) are false
  4. D.(A) is false but (B) is true

The worked solution is part of a paid pack.

Q14openHuman Reproduction · Male and female reproductive systems

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

  1. A.Testis epididymis vasa efferentia rete testis inguinal canal urethra
  2. B.Seminiferous tubules rete testis vasa efferentia epididymis vas deferens ejaculatory duct urethra urethral meatus✓
  3. C.Seminiferous tubules vasa efferentia epididymis inguinal canal urethra
  4. D.Testis epididymis vasa efferentia vas deferens ejaculatory duct inguinal canal urethra urethral meatus

The worked solution is part of a paid pack.

Q15openEvolution · Human evolution

Match the hominids with their correct (approximate) brain size:

Column IColumn II
(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
  1. A.(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
  2. B.(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
  3. C.(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)✓
  4. D.(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

The worked solution is part of a paid pack.

Q16openEvolution · Natural selection, Hardy–Weinberg, adaptive radiation

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

  1. A.Random and directional
  2. B.Random and directionless✓
  3. C.Small and directional
  4. D.Small and directionless

The worked solution is part of a paid pack.

Q17openBreathing and Exchange of Gases · Regulation and disorders

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

  1. A.Benign growth on the mucous lining of the nasal cavity
  2. B.Inflammation of the bronchi and bronchioles✓
  3. C.Proliferation of fibrous tissue and damage to the alveolar walls
  4. D.Reduction in the secretion of surfactants by pneumocytes

The worked solution is part of a paid pack.

Q18openBiotechnology: Principles and Processes · Tools of recombinant DNA technology

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

  1. A.Isopropanol
  2. B.Chilled ethanol✓
  3. C.Methanol at room temperature
  4. D.Chilled chloroform

The worked solution is part of a paid pack.

Q19open

Select the incorrect statement.

  1. A.Inbreeding increases homozygosity
  2. B.Inbreeding is essential to evolve pure lines in any animal
  3. C.Inbreeding selects harmful recessive genes that reduce fertility and productivity✓
  4. D.Inbreeding helps in the accumulation of superior genes and elimination of undesirable genes

The worked solution is part of a paid pack.

Q20openBody Fluids and Circulation · Human heart, cardiac cycle and ECG

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

  1. A.50 beats per minute
  2. B.75 beats per minute
  3. C.100 beats per minute✓
  4. D.125 beats per minute

The worked solution is part of a paid pack.

Q21openExcretory Products and their Elimination · Urine formation and its regulation

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

  1. A.Low levels of antidiuretic hormone
  2. B.Maintaining hyperosmolarity towards the inner medullary interstitium in the kidneys✓
  3. C.Secretion of erythropoietin by the juxtaglomerular complex
  4. D.Hydrostatic pressure during glomerular filtration

The worked solution is part of a paid pack.

Q22openReproductive Health · Population and birth control methods

Which of the following groups of contraceptive methods involve a role for hormones?

  1. A.Lactational amenorrhoea, pills, emergency contraceptives✓
  2. B.Barrier methods, lactational amenorrhoea, pills
  3. C.CuT, pills, emergency contraceptives
  4. D.Pills, emergency contraceptives, barrier methods

The worked solution is part of a paid pack.

Q23openBreathing and Exchange of Gases · Respiratory organs and mechanism of breathing

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

  1. A.1500 mL✓
  2. B.1700 mL
  3. C.2200 mL
  4. D.2700 mL

The worked solution is part of a paid pack.

Q24openBiotechnology: Principles and Processes · Tools of recombinant DNA technology

The following statements describe characteristics of the enzyme restriction endonuclease. Identify the INCORRECT statement.

  1. A.The enzyme cuts a DNA molecule at an identified position within the DNA
  2. B.The enzyme binds DNA at specific sites and cuts only one of the two strands✓
  3. C.The enzyme cuts the sugar-phosphate backbone at specific sites on each strand
  4. D.The enzyme recognises a specific palindromic nucleotide sequence in the DNA

The worked solution is part of a paid pack.

Q25openHuman Health and Disease · Drugs and alcohol abuse

The drug called 'Heroin' is synthesised by:

  1. A.Methylation of morphine
  2. B.Acetylation of morphine✓
  3. C.Glycosylation of morphine
  4. D.Nitration of morphine

The worked solution is part of a paid pack.

Q26openReproductive Health · Population and birth control methods

Select the hormone-releasing Intra-Uterine Devices.

  1. A.Vaults, LNG-20
  2. B.Multiload 375, Progestasert
  3. C.Progestasert, LNG-20✓
  4. D.Lippes Loop, Multiload 375

The worked solution is part of a paid pack.

Q27openEvolution · Natural selection, Hardy–Weinberg, adaptive radiation

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

  1. A.0.36 (AA); 0.48 (Aa); 0.16 (aa)
  2. B.0.16 (AA); 0.24 (Aa); 0.36 (aa)
  3. C.0.16 (AA); 0.48 (Aa); 0.36 (aa)✓
  4. D.0.16 (AA); 0.36 (Aa); 0.48 (aa)

The worked solution is part of a paid pack.

Q28openBiotechnology and its Applications · Applications in agriculture: Bt crops, RNAi

Which of the following is true for Golden Rice?

  1. A.It is vitamin A-enriched, with a gene from daffodil✓
  2. B.It is pest-resistant, with a gene from Bacillus thuringiensis
  3. C.It is drought-tolerant, developed using an Agrobacterium vector
  4. D.It has yellow grains because of a gene introduced from a primitive variety of rice

The worked solution is part of a paid pack.

Q29openReproductive Health · MTP, STDs and infertility; ART

Which of the following sexually transmitted diseases is NOT completely curable?

  1. A.Gonorrhoea
  2. B.Genital warts
  3. C.Genital herpes✓
  4. D.Chlamydiasis

The worked solution is part of a paid pack.

Q30openAnimal Kingdom · Non-chordates: Porifera to Echinodermata

Match the following organisms with their respective characteristics:

Column IColumn II
(a) Pila(i) Flame cells
(b) Bombyx(ii) Comb plates
(c) Pleurobrachia(iii) Radula
(d) Taenia(iv) Malpighian tubules
  1. A.(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
  2. B.(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)✓
  3. C.(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  4. D.(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

The worked solution is part of a paid pack.

Q31openChemical Coordination and Integration · Mechanism of hormone action

Which of the following glucose transporters is insulin-dependent?

  1. A.GLUT I
  2. B.GLUT II
  3. C.GLUT III
  4. D.GLUT IV✓

The worked solution is part of a paid pack.

Q32openHuman Health and Disease · Immunity, vaccination, AIDS, cancer

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

  1. A.Auto-immune response
  2. B.Humoral immune response
  3. C.Inflammatory immune response
  4. D.Cell-mediated immune response✓

The worked solution is part of a paid pack.

Q33openExcretory Products and their Elimination · Disorders and dialysis

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 the gastro-intestinal tract

(d) Reduced RBC production

Which of the following options is most appropriate?

  1. A.(a) and (b) are correct
  2. B.(b) and (c) are correct
  3. C.(c) and (d) are correct✓
  4. D.(a) and (d) are correct

The worked solution is part of a paid pack.

Q34open

Which of the following statements is correct?

  1. A.The cornea is an external, transparent and protective proteinaceous covering of the eyeball
  2. B.The cornea consists of dense connective tissue of elastin and can repair itself
  3. C.The cornea is a convex, transparent layer which is highly vascularised
  4. D.The cornea consists of a dense matrix of collagen and is the most sensitive portion of the eye✓

The worked solution is part of a paid pack.

Q35openStructural Organisation in Animals · Animal tissues

Identify the cells whose secretion protects the lining of the gastro-intestinal tract from various enzymes.

  1. A.Chief cells
  2. B.Goblet cells✓
  3. C.Oxyntic cells
  4. D.Duodenal cells

The worked solution is part of a paid pack.

Q36openHuman Reproduction · Fertilisation, implantation, pregnancy, parturition, lactation

Extrusion of the second polar body from the egg nucleus occurs:

  1. A.After entry of the sperm but before fertilisation✓
  2. B.After fertilisation
  3. C.Before entry of the sperm into the ovum
  4. D.Simultaneously with the first cleavage

The worked solution is part of a paid pack.

Q37openBiotechnology and its Applications · Applications in agriculture: Bt crops, RNAi

What triggers activation of the protoxin to the active Bt toxin of Bacillus thuringiensis in the bollworm gut?

  1. A.Body temperature
  2. B.Moist surface of the midgut
  3. C.Alkaline pH of the gut✓
  4. D.Acidic pH of the stomach

The worked solution is part of a paid pack.

Q38openHuman Health and Disease · Common diseases: pathogens and life cycles

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

  1. A.Plasmodium vivax / UTI test
  2. B.Streptococcus pneumoniae / Widal test
  3. C.Salmonella typhi / Anthrone test
  4. D.Salmonella typhi / Widal test✓

The worked solution is part of a paid pack.

Q39openChemical Coordination and Integration · Disorders

Match the following hormones with their respective associated disease:

Column IColumn II
(a) Insulin (deficiency)(i) Addison's disease
(b) Thyroxine (dysregulation)(ii) Diabetes insipidus
(c) Corticoids (deficiency)(iii) Acromegaly
(d) Growth hormone (excess)(iv) Goitre
(v) Diabetes mellitus
  1. A.(a)-(v), (b)-(i), (c)-(ii), (d)-(iii)
  2. B.(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  3. C.(a)-(v), (b)-(iv), (c)-(i), (d)-(iii)✓
  4. D.(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

The worked solution is part of a paid pack.

Q40openLocomotion and Movement · Skeletal system and joints

Select the correct option.

  1. A.The 8th, 9th and 10th pairs of ribs articulate directly with the sternum
  2. B.The 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage
  3. C.Each rib is a flat, thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum
  4. D.There are seven pairs of vertebrosternal ribs, three pairs of vertebrochondral ribs, and two pairs of vertebral (floating) ribs✓

The worked solution is part of a paid pack.