NEET UG

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The unique mammalian characteristics are: Answer: 3. hairs, pinna and mammary glands Key idea: Hairs, external ear (pinna) and mammary glands are unique mammalian features. A monocon... Chordates up to classes 1 answer
Which one of the following is NOT an advantage of inbreeding? Answer: 1. It decreases the productivity of inbred population, after continuous inbreeding. Key idea: Inbreeding increases homozygosity. It... Mechanism: variation, mutation, recombination, natural selection 1 answer
Which of the following statements are correct ?A. Basophils are most abundant cells of the total WBCsB. Basophils secrete histamine, serotonin and heparinC. Basophils are involved in inflammatory responseD. Basophils have kidney shaped nucleusE. Baso… Answer: 4. B and C only Key idea: Recall the properties of basophils. A is wrong: neutrophils are the most abundant WBCs, basophils are the... Body fluids: blood, blood groups, coagulation, lymph 1 answer
Which of the following are NOT under the control of thyroid hormone?A. Maintenance of water and electrolyte balanceB. Regulation of basal metabolic rateC. Normal rhythm of sleep-wake cycleD. Development of immune systemE. Support the process of R.B.C… Answer: 4. C and D only Key idea: Thyroid hormones act on metabolism, water-electrolyte balance and RBC formation. A: thyroid hormones suppo... Endocrine glands and hormones, mechanism of action 1 answer
Which of the following statements are correct regarding skeletal muscle?A. Muscle bundles are held together by collagenous connective tissue layer called fascicle.B. Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions.C. Striated… Answer: 3. B and C only Key idea: Check each statement on skeletal muscle. A is wrong: the layer of collagenous connective tissue around bun... Locomotion: movement types, muscle contraction 1 answer
Match List I with List II.List I: A. Mast cells; B. Inner surface of bronchiole; C. Blood; D. Tubular parts of nephronList II: I. Ciliated epithelium; II. Areolar connective tissue; III. Cuboidal epithelium; IV. specialised connective tissueChoose th… Answer: 4. A-II, B-I, C-IV, D-III Key idea: Match the cell or location with its tissue. Mast cells: areolar connective tissue (II). Inner su... Animal tissues: epithelial, connective, muscular, neural 1 answer
Which of the following is characteristic feature of cockroach regarding sexual dimorphism ? Answer: 3. Presence of anal styles Key idea: In cockroaches, males have a pair of anal styles that females lack. Both sexes have anal cerci,... Frog: morphology and anatomy 1 answer
In cockroach, excretion is brought about by-A. Phallic glandB. Urecose glandC. NephrocytesD. Fat bodyE. Collaterial glandsChoose the correct answer from the options given below: Answer: 4. B, C and D only Key idea: In cockroaches, excretion is done by Malpighian tubules, and also by fat body, nephrocytes and urecose... Frog: morphology and anatomy 1 answer
Given below are two statements:Statement I: A protein is imagined as a line, the left end represented by first amino acid (C-terminal) and the right end represented by last amino acid (N-terminal)Statement II: Adult human haemoglobin, consists of 4 s… Answer: 1. Statement I is false but Statement II is true. Key idea: Check the orientation of a protein and the structure of haemoglobin. Sta... Biomolecules: proteins, carbohydrates, lipids, nucleic acids 1 answer
Given below are two statements:Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid.Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively… Answer: 1. Statement I incorrect but Statement II is true. Key idea: DNA is negatively charged because of its phosphate groups. Statement I... Cell theory, prokaryotic and eukaryotic cells, plant vs animal cell 1 answer
Which of the following functions is carried out by cytoskeleton in a cell? Answer: 4. Motility Key idea: The cytoskeleton is a network of protein filaments that gives mechanical support, maintains cell shape and hel... Cytoskeleton, cilia, flagella, centrioles; nucleus 1 answer
Which of the following statements is correct? Answer: 3. Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. Key idea: Look at each stateme... Biodiversity: concept, patterns, importance, loss 1 answer
Given below are two statements:Statement I: Electrostatic precipitator is most widely used in thermal power plant.Statement II: Electrostatic precipitator in thermal power plant removes ionising radiationsIn the light of the above statements, choose… Answer: 4. Statement I is correct but Statement II is incorrect. Key idea: An electrostatic precipitator removes particulate matter, not rad... Biodiversity: concept, patterns, importance, loss 1 answer
Match List I with List II.List I: A. Logistic growth; B. Exponential growth; C. Expanding age pyramid; D. Stable age pyramidList II: I. Unlimited resource availability condition; II. Limited resource availability condition; III. The percent individua… Answer: 2. A-II, B-I, C-III, D-IV Key idea: Link each growth form or pyramid to its condition. Logistic growth: limited resources (II). Expo... Population attributes: growth, birth and death rate, age distribution 1 answer
Broad palm with single palm crease is visible in a person suffering from- Answer: 2. Down's syndrome Key idea: Down's syndrome (trisomy 21) has typical physical features. These include a short stature, a small roun... Sex-linked inheritance, Mendelian and chromosomal disorders 1 answer
Which one of the following symbols represents mating between relatives in human pedigree analysis? Answer: 3. [pedigree symbol: square joined to circle by double line] Key idea: In a human pedigree, a double horizontal line between the mal... Sex-linked inheritance, Mendelian and chromosomal disorders 1 answer
Match List I with List II.List I: A. Heroin; B. Marijuana; C. Cocaine; D. MorphineList II: I. Effect on cardiovascular system; II. Slow down body function; III. Painkiller; IV. Interfere with transport of dopamineChoose the correct answer from the op… Answer: 2. A-II, B-I, C-IV, D-III Key idea: Match each drug with its effect. Heroin (smack): a depressant that slows down body functions (II... Adolescence, drug, alcohol and tobacco abuse 1 answer
In which blood corpuscles, the HIV undergoes replication and produces progeny viruses? Answer: 2. T _II cells Key idea: HIV enters macrophages and helper T-lymphocytes. Inside the helper T cells (T_H) the virus makes DNA with r... HIV and AIDS 1 answer
Match List I with List II.List I: A. Ringworm; B. Filariasis; C. Malaria; D. PneumoniaList II: I. Haemophilus influenzae; II. Trichophyton; III. Wuchereria bancrofti; IV. Plasmodium vivaxChoose the correct answer from the options given below: Answer: 2. A-II, B-III, C-IV, D-I Key idea: Match disease and causative organism. Ringworm: Trichophyton (II). Filariasis: Wuchereria bancro... Pathogens and parasites causing human diseases 1 answer
Select the correct group/set of Australian Marsupials exhibiting adaptive radiation. Answer: 3. Numbat, Spotted cuscus, Flying phalanger Key idea: Adaptive radiation in Australian marsupials gave forms that resemble placental... Adaptive radiation 1 answer
Given below are two statements:Statement I: RNA mutates at a faster rate.Statement II: Viruses having RNA genome and shorter life span mutate and evolve faster.In the light of the above statements, choose the correct answer from the options given bel… Answer: 2. Both Statement I and Statement II are true. Key idea: RNA genomes mutate faster than DNA genomes. Statement I is true: RNA is les... Mechanism: variation, mutation, recombination, natural selection 1 answer
Vital capacity of lung is ________. Answer: 1. IRV + ERV + TV Key idea: Vital capacity is the maximum air that can be breathed out after a maximum inspiration. VC = ERV + TV +... Breathing and respiration: mechanism, exchange and transport of gases, volumes, disorders 1 answer
Match List I with List II.List I: A. P - wave; B. Q - wave; C. QRS complex; D. T - waveList II: I. Beginning of systole; II. Repolarisation of ventricles; III. Depolarisation of atria; IV. Depolarisation of ventriclesChoose the correct answer from th… Answer: 2. A-III, B-I, C-IV, D-II Key idea: Link each ECG wave to the heart event. P wave: depolarisation of the atria (III). Q wave: beginn... Circulation: heart, cardiac cycle, ECG, double circulation, regulation, disorders 1 answer
Given below are statements: one is labelled as Assertion A and the other is labelled as Reason R.Assertion A: Nephrons are of two types: Cortical & Juxta medullary, based on their relative position in cortex and medulla.Reason R: Juxta medullary neph… Answer: 4. A is true but R is false. Key idea: Nephron types depend on the position of the glomerulus, and the loop of Henle follows from it... Excretion: modes, nephron, urine formation, osmoregulation 1 answer

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