NEET UG

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The parts of human brain that helps in regulation of sexual behaviour, expression of excitement, pleasure, rage, fear etc. are : Answer: 2. Limbic system & hypothalamus Key idea: The limbic system together with the hypothalamus controls emotions and behaviour. It regul... Neural control: neuron, nervous system, nerve impulse 1 answer
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 increase in blood pressure.E.… Answer: 3. B, C and D only Key idea: Know the effects of ADH and ANF. A is wrong: excessive loss of fluid activates the osmoreceptors, which... Regulation of kidney function, disorders, dialysis 1 answer
Match List I with List II.List I: A. Vasectomy; B. Coitus interruptus; C. Cervical caps; D. SaheliList II: I. Oral method; II. Barrier method; III. Surgical method; IV. Natural methodChoose the correct answer from the options given below: Answer: 3. A-III, B-IV, C-II, D-I Key idea: Classify the contraceptive method. Vasectomy: surgical (III). Coitus interruptus: natural method... Birth control, contraception and MTP 1 answer
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.Assertion A: Endometrium is necessary for implantation of blastocyst.Reason R: In the absence of fertilization, the corpus luteum degenerates that ca… Answer: 3. Both A and R are true but R is NOT the correct explanation of A. Key idea: Both statements are true, but they are unrelated. A is... Fertilisation, embryo development to blastocyst, implantation 1 answer
Match List I with List II.List I (Cells): A. Peptic cells; B. Goblet cells; C. Oxyntic cells; D. Hepatic cellsList II (Secretion): I. Mucus; II. Bile juice; III. Proenzyme pepsinogen; IV. HCl and intrinsic factor for absorption of vitamin B_12Choose… Answer: 4. A-III, B-I, C-IV, D-II Key idea: Match the gastric and liver cells with their secretions. Peptic (chief) cells: pepsinogen, a pro... Animal tissues: epithelial, connective, muscular, neural 1 answer
Which one of the following statements is NOT correct? Answer: 3. Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries. Key idea: Algal blooms caus... Sewage treatment and energy generation (biogas) 1 answer
Which of the following are NOT considered as the part of endomembrane system?A. MitochondriaB. Endoplasmic ReticulumC. ChloroplastsD. Golgi complexE. PeroxisomesChoose the most appropriate answer from the options given below: Answer: 3. A, C and E only Key idea: The endomembrane system includes organelles whose functions are coordinated: ER, Golgi complex, lysosom... Endomembrane system: ER, Golgi, lysosomes, vacuoles 1 answer
Melonate inhibits the growth of pathogenic bacteria by inhibiting the activity of Answer: 2. Succinic dehydrogenase Key idea: Malonate (written "melonate" in the question) is a competitive inhibitor of succinic dehydrogena... Enzymes: types, properties, action, classification 1 answer
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 rese… Answer: 2. Both Statement I and Statement II are true. Key idea: Both statements are standard facts about enzymes. Statement I is true: low... Enzymes: types, properties, action, classification 1 answer
How many different proteins does the ribosome consist of? Answer: 2. 80 Key idea: A ribosome is made of rRNA and about 80 different proteins. This is the figure used in NCERT, so the answer is 80. O... Mitochondria, ribosomes, plastids, microbodies 1 answer
Match List I with List II :List I (Interaction) | List II (Species A and B)A. Mutualism | I. +(A), O(B)B. Commensalism | II. -(A), O(B)C. Amensalism | III. +(A), -(B)D. Parasitism | IV. +(A), +(B)Choose the correct answer from the options given below… Answer: 3. A-IV, B-I, C-II, D-III Key idea: Use the signs for effect on species A and B. Mutualism: +, + (IV). Commensalism: + for A, 0 for... Population interactions: mutualism, competition, predation, parasitism 1 answer
Given below are two statements :Statement I : Gause's 'Competitive Exclusion Principle' states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually… Answer: 4. Statement I is correct but Statement II is false. Key idea: Statement I is Gause's principle, which is correct. Statement II is f... Population interactions: mutualism, competition, predation, parasitism 1 answer
Match List I with List II.List I (Interacting species): A. A Leopard and a Lion in a forest/grassland; B. A Cuckoo laying egg in a Crow's nest; C. Fungi and root of a higher plant in Mycorrtizae; D. A cattle egret and a Cattle in a fieldList II (Name… Answer: 2. A-I, B-II, C-III, D-IV Key idea: Identify the type of interaction in each case. Leopard and lion share prey: competition (I). Cuc... Population interactions: mutualism, competition, predation, parasitism 1 answer
Match List I with List II.List I: A. Gene 'a'; B. Gene 'y'; C. Gene 'i'; D. Gene 'z'List II: I. β-galactosidase; II. Transacetylase; III. Permease; IV. Repressor proteinChoose the correct answer from the options given below: Answer: 3. A-II, B-III, C-IV, D-I Key idea: In the lac operon, each gene codes for a specific protein. Gene i codes for the repressor protei... Gene regulation: lac operon 1 answer
Which of the following statements are correct about Klinefelter's Syndrome?A. This disorder was first described by Langdon Down (1866).B. Such an individual has overall masculine development. However, the feminine development is also expressed.C. The… Answer: 4. B and E only Key idea: Klinefelter's syndrome has the karyotype 47, XXY. A is wrong: Langdon Down described Down syndrome. B is c... Sex-linked inheritance, Mendelian and chromosomal disorders 1 answer
Match List I with List II :List I | List IIA. Cohesion | I. More attraction in liquid phaseB. Adhesion | II. Mutual attraction among water moleculesC. Surface tension | III. Water loss in liquid phaseD. Guttation | IV. Attraction towards polar surfac… Answer: 2. A-II, B-IV, C-I, D-III Key idea: Match each term with its meaning. Cohesion: mutual attraction among water molecules (II). Adhesi... Photosynthesis: site and pigments 1 answer
Match List I with List II :List I | List IIA. Oxidative decarboxylation | I. Citrate synthaseB. Glycolysis | II. Pyruvate dehydrogenaseC. Oxidative phosphorylation | III. Electron transport systemD. Tricarboxylic acid cycle | IV. EMP pathwayChoose th… Answer: 1. A-II, B-IV, C-III, D-I Key idea: Match the process with its enzyme or pathway. Oxidative decarboxylation: pyruvate dehydrogenase... TCA cycle and electron transport system, ATP yield 1 answer
Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R :Assertion A : A flower is defined as modified shoot wherein the shoot apical meristem changes to floral meristem.Reason R : Internode of the shoot… Answer: 2. Both A and R are true and R is the correct explanation of A. Key idea: A flower is a modified shoot in which the shoot apical mer... Flower, fruit and seed 1 answer
Which one of the following techniques does not serve the purpose of early diagnosis of a disease for its early treatment? Answer: 3. Serum and Urine analysis Key idea: Early diagnosis needs methods that detect a pathogen or a gene before symptoms appear. PCR amp... Applications in health: human insulin, vaccines, gene therapy 1 answer
Which of the following is not a cloning vector? Answer: 1. Probe Key idea: A cloning vector carries foreign DNA into a host and replicates there. BAC (bacterial artificial chromosome), YAC... Tools: restriction enzymes, vectors, host 1 answer
Match List I with List II.List I: A. Taenia; B. Paramoecium; C. Periplaneta; D. PheretimaList II: I. Nephridia; II. Contractile vacuole; III. Flame cells; IV. Urecose glandChoose the correct answer from the options give below: Answer: 4. A-III, B-II, C-IV, D-I Key idea: Match the animal with its excretory structure. Taenia: flame cells (III). Paramoecium: contracti... Non-chordates up to phyla 1 answer
Radial symmetry is NOT found in adults of phylum ________. Answer: 3. Hemichordata Key idea: Adult hemichordates (such as Balanoglossus) are bilaterally symmetrical. Adult echinoderms, ctenophores an... Non-chordates up to phyla 1 answer
Match List I with List II.List I: A. CCK; B. GIP; C. ANF; D. ADHList II: I. Kidney; II. Heart; III. Gastric gland; IV. PancreasChoose the correct answer from the options given below: Answer: 2. A-IV, B-III, C-II, D-I Key idea: Match each hormone with its source. CCK: secreted by the gastrointestinal tract and acts on the... Endocrine glands and hormones, mechanism of action 1 answer
Match List I with List II with respect to human eye.List I: A. Fovea; B. Iris; C. Blind spot; D. ScleraList II: I. Visible coloured portion of eye that regulates diameter of pupil.; II. External layer of eye formed of dense connective tissue.; III. P… Answer: 2. A-III, B-I, C-IV, D-II Key idea: Match each eye part with its function. Fovea: point of greatest visual acuity (III). Iris: visib... Neural control: neuron, nervous system, nerve impulse 1 answer

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