Match List I with List II.
| List I | List II |
|---|---|
| A. Vasectomy | I. Oral method |
| B. Coitus interruptus | II. Barrier method |
| C. Cervical caps | III. Surgical method |
| D. Saheli | IV. Natural method |
Choose the correct answer from the options given below:
NEET 2023 — Zoology
All 50 Zoology questions we hold from this paper, of the 198 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.
Q1openReproductive Health · Population and birth control methods
- A.A-III, B-I, C-IV, D-II
- B.A-III, B-IV, C-II, D-I✓
- C.A-II, B-III, C-I, D-IV
- D.A-IV, B-II, C-I, D-III
The worked solution is part of a paid pack.
Q2openHuman Reproduction · Male and female reproductive systems
Given below are two statements:
Statement I: The vas deferens receives a duct from the seminal vesicle and opens into the urethra as the ejaculatory duct.
Statement II: The cavity of the cervix is called the cervical canal, which along with the vagina forms the birth canal.
In the light of the above statements, choose the correct answer from the options given below:
- A.Both Statement I and Statement II are true.✓
- B.Both Statement I and Statement II are false.
- C.Statement I is correct but Statement II is false.
- D.Statement I is incorrect but Statement II is true.
The worked solution is part of a paid pack.
Q3open
Which of the following statements is correct?
- A.Eutrophication refers to an increase in domestic sewage and waste water in lakes.
- B.Biomagnification refers to an increase in the concentration of the toxicant at successive trophic levels.✓
- C.The presence of a large amount of nutrients in water restricts 'algal bloom'.
- D.Algal bloom decreases fish mortality.
The worked solution is part of a paid pack.
Q4openPrinciples of Inheritance and Variation · Sex determination, mutation, genetic disorders
Which one of the following symbols (shown in the figure) represents mating between relatives in human pedigree analysis?
- A.Symbol (1)
- B.Symbol (2)✓
- C.Symbol (3)
- D.Symbol (4)
The worked solution is part of a paid pack.
Q5openReproductive Health · MTP, STDs and infertility; ART
Which one of the following common sexually transmitted diseases is completely curable when detected early and treated properly?
- A.Genital herpes
- B.Gonorrhoea✓
- C.Hepatitis-B
- D.HIV infection
The worked solution is part of a paid pack.
Q6openHuman Health and Disease · Drugs and alcohol abuse
Match List I with List II.
| List I | List II |
|---|---|
| A. Heroin | I. Effect on cardiovascular system |
| B. Marijuana | II. Slows down body functions |
| C. Cocaine | III. Painkiller |
| D. Morphine | IV. Interferes with transport of dopamine |
Choose the correct answer from the options given below:
- A.A-II, B-I, C-IV, D-III✓
- B.A-I, B-II, C-III, D-IV
- C.A-IV, B-III, C-II, D-I
- D.A-III, B-IV, C-I, D-II
The worked solution is part of a paid pack.
Q7openLocomotion and Movement · Skeletal system and joints
Match List I with List II.
| List I (Type of joint) | List II (Found between) |
|---|---|
| A. Cartilaginous joint | I. Between flat skull bones |
| B. Ball and socket joint | II. Between adjacent vertebrae in the vertebral column |
| C. Fibrous joint | III. Between carpal and metacarpal of thumb |
| D. Saddle joint | IV. Between humerus and pectoral girdle |
Choose the correct answer from the options given below:
- A.A-III, B-I, C-II, D-IV
- B.A-II, B-IV, C-I, D-III✓
- C.A-I, B-IV, C-III, D-II
- D.A-II, B-IV, C-III, D-I
The worked solution is part of a paid pack.
Q8openBiomolecules · Carbohydrates, lipids, amino acids and proteins
Given below are two statements:
Statement I: A protein is imagined as a line, the left end represented by the first amino acid (C-terminal) and the right end represented by the last amino acid (N-terminal).
Statement II: Adult human haemoglobin consists of 4 subunits (two subunits of α type and two subunits of β type).
In the light of the above statements, choose the correct answer from the options given below:
- A.Both Statement I and Statement II are true
- B.Both Statement I and Statement II are false.
- C.Statement I is true but Statement II is false.
- D.Statement I is false but Statement II is true.✓
The worked solution is part of a paid pack.
Q9openCell: The Unit of Life · Cell membrane, cell wall and endomembrane system
Which of the following are not considered as part of the endomembrane system?
A. Mitochondria · B. Endoplasmic reticulum · C. Chloroplasts · D. Golgi complex · E. Peroxisomes
Choose the most appropriate answer from the options given below:
- A.B and D only
- B.A, C and E only✓
- C.A and D only
- D.A, D and E only
The worked solution is part of a paid pack.
Q10openEvolution · Origin of life and evidences of evolution
Given below are two statements:
Statement I: RNA mutates at a faster rate.
Statement II: Viruses having an RNA genome and a shorter life span mutate and evolve faster.
In the light of the above statements, choose the correct answer from the options given below:
- A.Both Statement I and Statement II are true.✓
- B.Both Statement I and Statement II are false.
- C.Statement I is true but Statement II is false.
- D.Statement I is false but Statement II is true.
The worked solution is part of a paid pack.
Q11openChemical Coordination and Integration · Endocrine glands and their hormones
Match List I with List II.
| List I | List II |
|---|---|
| A. CCK | I. Kidney |
| B. GIP | II. Heart |
| C. ANF | III. Gastric gland |
| D. ADH | IV. Pancreas |
Choose the correct answer from the options given below:
- A.A-IV, B-III, C-II, D-I✓
- B.A-III, B-II, C-IV, D-I
- C.A-II, B-IV, C-I, D-III
- D.A-IV, B-II, C-III, D-I
The worked solution is part of a paid pack.
Q12openHuman Reproduction · Fertilisation, implantation, pregnancy, parturition, lactation
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The endometrium is necessary for implantation of the blastocyst.
Reason R: In the absence of fertilisation, the corpus luteum degenerates, which causes disintegration of the endometrium.
In the light of the above statements, choose the correct answer from the options given below:
- A.Both A and R are true and R is the correct explanation of A.
- B.Both A and R are true but R is NOT the correct explanation of A.✓
- C.A is true but R is false.
- D.A is false but R is true.
The worked solution is part of a paid pack.
Q13openHuman Health and Disease · Common diseases: pathogens and life cycles
Match List I with List II.
| List I | List II |
|---|---|
| A. Ringworm | I. Haemophilus influenzae |
| B. Filariasis | II. Trichophyton |
| C. Malaria | III. Wuchereria bancrofti |
| D. Pneumonia | IV. Plasmodium vivax |
Choose the correct answer from the options given below:
- A.A-II, B-III, C-IV, D-I✓
- B.A-II, B-III, C-I, D-IV
- C.A-III, B-II, C-I, D-IV
- D.A-III, B-II, C-IV, D-I
The worked solution is part of a paid pack.
Q14openBiomolecules · Enzymes: mechanism, factors, classification
Given below are two statements:
Statement I: Low temperature preserves the enzyme in a temporarily inactive state, whereas high temperature destroys enzymatic activity because proteins are denatured by heat.
Statement II: When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as a competitive inhibitor.
In the light of the above statements, choose the correct answer from the options given below:
- A.Both Statement I and Statement II are true.✓
- B.Both Statement I and Statement II are false.
- C.Statement I is true but Statement II is false.
- D.Statement I is false but Statement II is true.
The worked solution is part of a paid pack.
Q15openAnimal Kingdom · Non-chordates: Porifera to Echinodermata
Match List I with List II.
| List I | List II |
|---|---|
| A. Taenia | I. Nephridia |
| B. Paramoecium | II. Contractile vacuole |
| C. Periplaneta | III. Flame cells |
| D. Pheretima | IV. Urecose gland |
Choose the correct answer from the options given below:
- A.A-I, B-II, C-III, D-IV
- B.A-I, B-II, C-IV, D-III
- C.A-III, B-II, C-IV, D-I✓
- D.A-II, B-I, C-IV, D-III
The worked solution is part of a paid pack.
Q16openBiotechnology and its Applications · Applications in medicine: insulin, gene therapy, molecular diagnosis
Which one of the following techniques does not serve the purpose of early diagnosis of a disease for its early treatment?
- A.Recombinant DNA technology
- B.Serum and urine analysis✓
- C.Polymerase chain reaction (PCR) technique
- D.Enzyme-linked immunosorbent assay (ELISA) technique
The worked solution is part of a paid pack.
Q17openOrganisms and Populations · Population attributes, growth models and interactions
Match List I with List II.
| List I (Interacting species) | List II (Name of interaction) |
|---|---|
| A. A leopard and a lion in a forest/grassland | I. Competition |
| B. A cuckoo laying an egg in a crow's nest | II. Brood parasitism |
| C. Fungi and the root of a higher plant in mycorrhizae | III. Mutualism |
| D. A cattle egret and cattle in a field | IV. Commensalism |
Choose the correct answer from the options given below:
- A.A-I, B-II, C-III, D-IV✓
- B.A-I, B-II, C-IV, D-III
- C.A-III, B-IV, C-I, D-II
- D.A-II, B-III, C-I, D-IV
The worked solution is part of a paid pack.
Q18openStructural Organisation in Animals · Animal tissues
Given below are two statements:
Statement I: Ligaments are dense irregular tissue.
Statement II: Cartilage is dense regular tissue.
In the light of the above statements, choose the correct answer from the options given below:
- A.Both Statement I and Statement II are true
- B.Both Statement I and Statement II are false✓
- C.Statement I is true but Statement II is false
- D.Statement I is false but Statement II is true
The worked solution is part of a paid pack.
Q19openMolecular Basis of Inheritance · DNA structure and replication
Given below are two statements:
Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called the nucleoid.
Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form the nucleosome.
In the light of the above statements, choose the correct answer from the options given below:
- A.Both Statement I and Statement II are true.
- B.Both Statement I and Statement II are false.
- C.Statement I is correct but Statement II is false.
- D.Statement I is incorrect but Statement II is true.✓
The worked solution is part of a paid pack.
Q20openNeural Control and Coordination · Central nervous system
Match List I with List II with respect to the human eye.
| List I | List II |
|---|---|
| A. Fovea | I. Visible coloured portion of the eye that regulates the diameter of the pupil |
| B. Iris | II. External layer of the eye formed of dense connective tissue |
| C. Blind spot | III. Point of greatest visual acuity or resolution |
| D. Sclera | IV. Point where the optic nerve leaves the eyeball and photoreceptor cells are absent |
Choose the correct answer from the options given below:
- A.A-III, B-I, C-IV, D-II✓
- B.A-IV, B-III, C-II, D-I
- C.A-I, B-IV, C-III, D-II
- D.A-II, B-I, C-III, D-IV
The worked solution is part of a paid pack.
Q21openEvolution · Natural selection, Hardy–Weinberg, adaptive radiation
Select the correct group/set of Australian marsupials exhibiting adaptive radiation:
- A.Tasmanian wolf, bobcat, marsupial mole
- B.Numbat, spotted cuscus, flying phalanger✓
- C.Mole, flying squirrel, Tasmanian tiger cat
- D.Lemur, anteater, wolf
The worked solution is part of a paid pack.
Q22openHuman Reproduction · Gametogenesis and menstrual cycle
Which of the following statements are correct regarding the female reproductive cycle?
A. In non-primate mammals, cyclical changes during reproduction are called the oestrous cycle.
B. The first menstrual cycle begins at puberty and is called menopause.
C. Lack of menstruation may be indicative of pregnancy.
D. Cyclic menstruation extends between menarche and menopause.
Choose the most appropriate answer from the options given below:
- A.A and D only
- B.A and B only
- C.A, B and C only
- D.A, C and D only✓
The worked solution is part of a paid pack.
Q23openBreathing and Exchange of Gases · Respiratory organs and mechanism of breathing
The vital capacity of the lung is _________.
- A.IRV + ERV
- B.IRV + ERV + TV + RV
- C.IRV + ERV + TV – RV
- D.IRV + ERV + TV✓
The worked solution is part of a paid pack.
Q24openBody Fluids and Circulation · Human heart, cardiac cycle and ECG
Match List I with List II.
| List I | List II |
|---|---|
| A. P-wave | I. Beginning of systole |
| B. Q-wave | II. Repolarisation of ventricles |
| C. QRS complex | III. Depolarisation of atria |
| D. T-wave | IV. Depolarisation of ventricles |
Choose the correct answer from the options given below:
- A.A-III, B-I, C-IV, D-II✓
- B.A-IV, B-III, C-II, D-I
- C.A-II, B-IV, C-I, D-III
- D.A-I, B-II, C-III, D-IV
The worked solution is part of a paid pack.
Q25openReproductive Health · Population and birth control methods
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Amniocentesis for sex determination is one of the strategies of the Reproductive and Child Health Care Programme.
Reason R: The ban on amniocentesis checks the increasing menace of female foeticide.
In the light of the above statements, choose the correct answer from the options given below:
- A.Both A and R are true and R is the correct explanation of A.
- B.Both A and R are true and R is NOT the correct explanation of A.
- C.A is true but R is false.
- D.A is false but R is true.✓
The worked solution is part of a paid pack.
Q27openMolecular Basis of Inheritance · Gene regulation: lac operon; Human Genome Project, DNA fingerprinting
Match List I with List II.
| List I | List II |
|---|---|
| A. Gene a | I.β−galactosidase |
| B. Gene y | II. Transacetylase |
| C. Gene i | III. Permease |
| D. Gene z | IV. Repressor protein |
Choose the correct answer from the options given below:
- A.A-II, B-I, C-IV, D-III
- B.A-II, B-III, C-IV, D-I✓
- C.A-III, B-IV, C-I, D-II
- D.A-III, B-I, C-IV, D-II
The worked solution is part of a paid pack.
Q28open
Match List I with List II.
| List I (Cells) | List II (Secretion) |
|---|---|
| A. Peptic cells | I. Mucus |
| B. Goblet cells | II. Bile juice |
| C. Oxyntic cells | III. Proenzyme pepsinogen |
| D. Hepatic cells | IV. HCl and intrinsic factor for absorption of vitamin B12 |
Choose the correct answer from the options given below:
- A.A-IV, B-III, C-II, D-I
- B.A-II, B-I, C-III, D-IV
- C.A-III, B-I, C-IV, D-II✓
- D.A-II, B-IV, C-I, D-III
The worked solution is part of a paid pack.
Q29openCell: The Unit of Life · Mitochondria, plastids, ribosomes, cytoskeleton, nucleus
Which of the following functions is carried out by the cytoskeleton in a cell?
- A.Nuclear division
- B.Protein synthesis
- C.Motility✓
- D.Transportation
The worked solution is part of a paid pack.
Q30openExcretory Products and their Elimination · Human excretory system and nephron
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Nephrons are of two types, cortical and juxtamedullary, based on their relative position in the cortex and medulla.
Reason R: Juxtamedullary nephrons have a short loop of Henle whereas cortical nephrons have a longer loop of Henle.
In the light of the above statements, choose the correct answer from the options given below:
- A.Both A and R are true and R is the correct explanation of A.
- B.Both A and R are true but R is NOT the correct explanation of A.
- C.A is true but R is false.✓
- D.A is false but R is true.
The worked solution is part of a paid pack.
Q31open
Given below are two statements:
Statement I: The electrostatic precipitator is most widely used in thermal power plants.
Statement II: The electrostatic precipitator in a thermal power plant removes ionising radiations.
In the light of the above statements, choose the most appropriate answer from the options given below:
- A.Both Statement I and Statement II are correct.
- B.Both Statement I and Statement II are incorrect.
- C.Statement I is correct but Statement II is incorrect.✓
- D.Statement I is incorrect but Statement II is correct.
The worked solution is part of a paid pack.
Q32openPrinciples of Inheritance and Variation · Sex determination, mutation, genetic disorders
A broad palm with a single palm crease is visible in a person suffering from:
- A.Down's syndrome✓
- B.Turner's syndrome
- C.Klinefelter's syndrome
- D.Thalassemia
The worked solution is part of a paid pack.
Q33openAnimal Kingdom · Basis of classification
Radial symmetry is not found in adults of phylum ______.
- A.Ctenophora
- B.Hemichordata✓
- C.Coelenterata
- D.Echinodermata
The worked solution is part of a paid pack.
Q34openHuman Health and Disease · Immunity, vaccination, AIDS, cancer
In which blood corpuscles does HIV undergo replication and produce progeny viruses?
- A.TH cells✓
- B.B-lymphocytes
- C.Basophils
- D.Eosinophils
The worked solution is part of a paid pack.
Q35openBiotechnology: Principles and Processes · Tools of recombinant DNA technology
Which of the following is not a cloning vector?
- A.BAC
- B.YAC
- C.pBR322
- D.Probe✓
The worked solution is part of a paid pack.
Q36openOrganisms and Populations · Population attributes, growth models and interactions
Match List I with List II.
| List I | List II |
|---|---|
| A. Logistic growth | I. Unlimited resource availability condition |
| B. Exponential growth | II. Limited resource availability condition |
| C. Expanding age pyramid | III. The percentage of individuals of pre-reproductive age is largest, followed by reproductive and post-reproductive age groups |
| D. Stable age pyramid | IV. The percentages of individuals of pre-reproductive and reproductive age groups are the same |
Choose the correct answer from the options given below:
- A.A-II, B-I, C-III, D-IV✓
- B.A-II, B-III, C-I, D-IV
- C.A-II, B-IV, C-I, D-III
- D.A-II, B-IV, C-III, D-I
The worked solution is part of a paid pack.
Q37openAnimal Kingdom · Basis of classification
Select the correct statements with reference to chordates.
A. Presence of a mid-dorsal, solid and double nerve cord.
B. Presence of a closed circulatory system.
C. Presence of paired pharyngeal gill slits.
D. Presence of a dorsal heart.
E. Triploblastic pseudocoelomate animals.
Choose the correct answer from the options given below:
- A.A, C and D only
- B.B and C only✓
- C.B, D and E only
- D.C, D and E only
The worked solution is part of a paid pack.
Q38openNeural Control and Coordination · Central nervous system
The parts of the human brain that help in the regulation of sexual behaviour, expression of excitement, pleasure, rage, fear etc. are:
- A.Limbic system and hypothalamus✓
- B.Corpora quadrigemina and hippocampus
- C.Brain stem and epithalamus
- D.Corpus callosum and thalamus
The worked solution is part of a paid pack.
Q39openAnimal Kingdom · Chordates: Pisces to Mammalia
The unique mammalian characteristics are:
- A.hairs, tympanic membrane and mammary glands
- B.hairs, pinna and mammary glands✓
- C.hairs, pinna and indirect development
- D.pinna, monocondylic skull and mammary glands
The worked solution is part of a paid pack.
Q40openChemical Coordination and Integration · Endocrine glands and their hormones
Which of the following are not under the control of thyroid hormone?
A. Maintenance of water and electrolyte balance
B. Regulation of basal metabolic rate
C. Normal rhythm of the sleep–wake cycle
D. Development of the immune system
E. Support of the process of RBC formation
Choose the correct answer from the options given below:
- A.A and D only
- B.B and C only
- C.C and D only✓
- D.D and E only
The worked solution is part of a paid pack.
Q41openCell Cycle and Cell Division · Meiosis and its significance
Select the correct statements.
A. Tetrad formation is seen during leptotene.
B. During anaphase, the centromeres split and chromatids separate.
C. Terminalisation takes place during pachytene.
D. The nucleolus, Golgi complex and ER are reformed during telophase.
E. Crossing over takes place between sister chromatids of homologous chromosomes.
Choose the correct answer from the options given below:
- A.A and C only
- B.B and D only✓
- C.A, C and E only
- D.B and E only
The worked solution is part of a paid pack.
Q42openStructural Organisation in Animals · Animal tissues
Match List I with List II.
| List I | List II |
|---|---|
| A. Mast cells | I. Ciliated epithelium |
| B. Inner surface of bronchiole | II. Areolar connective tissue |
| C. Blood | III. Cuboidal epithelium |
| D. Tubular parts of nephron | IV. Specialised connective tissue |
Choose the correct answer from the options given below:
- A.A-I, B-II, C-IV, D-III
- B.A-II, B-III, C-I, D-IV
- C.A-II, B-I, C-IV, D-III✓
- D.A-III, B-IV, C-II, D-I
The worked solution is part of a paid pack.
Q43openStructural Organisation in Animals · Frog: morphology and anatomy
Which of the following is a characteristic feature of the cockroach regarding sexual dimorphism?
- A.Dark brown body colour and anal cerci
- B.Presence of anal styles✓
- C.Presence of sclerites
- D.Presence of anal cerci
The worked solution is part of a paid pack.
Q44openMolecular Basis of Inheritance · Transcription, genetic code, translation
Which one of the following is the sequence on the corresponding coding strand, if the sequence on the mRNA formed is 5′-AUCGAUCGAUCGAUCGAUCGAUCG AUCG-3′?
- A.5′-UAGCUAGCUAGCUAGCUAGCUAGCUAGC-3′
- B.3′-UAGCUAGCUAGCUAGCUAGCUAGCUAGC-5′
- C.5′-ATCGATCGATCGATCGATCGATCGATCG-3′✓
- D.3′-ATCGATCGATCGATCGATCGATCGATCG-5′
The worked solution is part of a paid pack.
Q45openStructural Organisation in Animals · Frog: morphology and anatomy
In the cockroach, excretion is brought about by:
A. Phallic gland · B. Urecose gland · C. Nephrocytes · D. Fat body · E. Collaterial glands
Choose the correct answer from the options given below:
- A.A and E only
- B.A, B and E only
- C.B, C and D only✓
- D.B and D only
The worked solution is part of a paid pack.
Q46openCell Cycle and Cell Division · Phases of the cell cycle
Given below are two statements:
Statement I: During the G0 phase of the cell cycle, the cell is metabolically inactive.
Statement II: The centrosome undergoes duplication during the S phase of interphase.
In the light of the above statements, choose the most appropriate answer from the options given below:
- A.Both Statement I and Statement II are correct
- B.Both Statement I and Statement II are incorrect.
- C.Statement I is correct but Statement II is incorrect.
- D.Statement I is incorrect but Statement II is correct.✓
The worked solution is part of a paid pack.
Q47open
Which one of the following is not an advantage of inbreeding?
- A.It decreases homozygosity.
- B.It exposes harmful recessive genes, which are eliminated by selection.
- C.Elimination of less desirable genes and accumulation of superior genes takes place due to it.
- D.It decreases the productivity of the inbred population after continuous inbreeding.✓
The worked solution is part of a paid pack.
Q48openExcretory Products and their Elimination · Urine formation and its regulation
Which of the following statements are correct?
A. An excessive loss of body fluid from the body switches off osmoreceptors.
B. ADH facilitates water reabsorption to prevent diuresis.
C. ANF causes vasodilation.
D. ADH causes an increase in blood pressure.
E. ADH is responsible for a decrease in GFR.
Choose the correct answer from the options given below:
- A.A and B only
- B.B, C and D only✓
- C.A, B and E only
- D.C, D and E only
The worked solution is part of a paid pack.
Q49openLocomotion and Movement · Skeletal muscle and mechanism of contraction
Which of the following statements are correct regarding skeletal muscle?
A. Muscle bundles are held together by a collagenous connective tissue layer called the fascicle.
B. The sarcoplasmic reticulum of the muscle fibre is a store house of calcium ions.
C. The striated appearance of the skeletal muscle fibre is due to the distribution pattern of actin and myosin proteins.
D. The M line is considered the functional unit of contraction, called the sarcomere.
Choose the most appropriate answer from the options given below:
- A.A, B and C only
- B.B and C only✓
- C.A, C and D only
- D.C and D only
The worked solution is part of a paid pack.
Q50openBody Fluids and Circulation · Blood, blood groups and lymph
Which of the following statements are correct?
A. Basophils are the most abundant cells of the total WBCs.
B. Basophils secrete histamine, serotonin and heparin.
C. Basophils are involved in the inflammatory response.
D. Basophils have a kidney-shaped nucleus.
E. Basophils are agranulocytes.
Choose the correct answer from the options given below:
- A.D and E only
- B.C and E only
- C.B and C only✓
- D.A and B only
The worked solution is part of a paid pack.