NEET Botany Important & Repeated Questions 2027

Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence. A. Prothallus stage B. Meiosis in spore mother cells C. Fertilisation D. Formation of archegonia and antheridia in gametophyte. E. Transfer of antherozoids to the archegonia in presence of water. Choose the correct answer from the options given below: (1) B, A, D, E, C (2) B, A, E, C, D (3) D, E, C, A, B (4) E, D, C, B, A

Read the following statements and choose the set of correct statements: In the members of Phaeophyceae. A. Asexual reproduction occurs usually by biflagellate zoospores. B. Sexual reproduction is by oogamous method only. C. Stored food is in the form of carbohydrates which is either mannitol or laminarin. D. The major pigments found are chlorophyll a, c and carotenoids and xanthophyll. E. Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin. Choose the correct answer from the options given below: (1) A, B, C and E only (2) A, B, C and D only (3) B, C, D and E only (4) A, C, D and E only

Which of the following is an example of actinomorphic flower? (1) Sesbania (2) Datura (3) Cassia (4) Pisum

Family Fabaceae differs from Solanaceae and Liliaceae. With respect to the characteristics specific to family Fabaceae but not found in Solanaceae or Liliaceae, pick out the characteristics specific to family Fabaceae but not found in Solanaceae or Liliaceae. (1) Epiphyllous and Dithecous anthers (2) Diadelphous and Dithecous anthers (3) Polyadelphous and epipetalous stamens (4) Monoadelphous and Monothecous anthers

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Late wood has fewer xylary elements with narrow vessels. Reason R : Cambium is less active in winters. In the light of the above statements, choose the correct answer from the options given below : (1) A is false but R is true. (2) Both A and R are true and R is the correct explanation of A. (3) Both A and R are true but R is NOT the correct explanation of A. (4) A is true but R is false.

Match List - I with List - II. List - I: A. Centromere B. Cilium C. Cristae D. Cell membrane. List - II: I. Mitochondrion II. Cell division III. Cell movement IV. Phospholipid Bilayer. Choose the correct answer from the options given below: (1) A-I, B-II, C-III, D-IV (2) A-II, B-I, C-IV, D-III (3) A-IV, B-II, C-III, D-I (4) A-II, B-III, C-I, D-IV

From the statements given below choose the correct option: A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S. B. Each ribosome has two sub-units. C. The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S. D. The two sub-units of 80S ribosome are 60S and 20S and that of 70S are 50S and 20S. E. The two sub-units of 80S ribosome are 60S and 30S and that of 70S are 50S and 30S. (1) A, B, C are true (2) A, B, D are true (3) A, B, E are true (4) B, D, E are true

Which one of the following enzymes contains 'Haem' as the prosthetic group? (1) RuBisCo (2) Carbonic anhydrase (3) Succinate dehydrogenase (4) Catalase

The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis? (1) Diakinesis (2) Zygotene (3) Pachytene (4) Diplotene

How many molecules of ATP and NADPH are required for every molecule of CO₂ fixed in the Calvin cycle? (1) 3 molecules of ATP and 2 molecules of NADPH (2) 2 molecules of ATP and 3 molecules of NADPH (3) 2 molecules of ATP and 2 molecules of NADPH (4) 3 molecules of ATP and 3 molecules of NADPH

Given below are two statements: Statement I : In C₃ plants, some O₂ binds to RuBisCO, hence CO₂ fixation is decreased. Statement II : In C₄ plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespiration. In the light of the above statements, choose the correct answer from the options given below: (1) Statement I is false but Statement II is true (2) Both Statement I and Statement II are true (3) Both Statement I and Statement II are false (4) Statement I is true but Statement II is false

Which of the following combinations is required for chemiosmosis? (1) proton pump, electron gradient, NADP synthase (2) membrane, proton pump, proton gradient, ATP synthase (3) membrane, proton pump, proton gradient, NADP synthase (4) proton pump, electron gradient, ATP synthase

The complex II of mitochondrial electron transport chain is also known as (1) Cytochrome bc₁ (2) Succinate dehydrogenase (3) Cytochrome c oxidase (4) NADH dehydrogenase

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R : Assertion A : ATP is used at two steps in glycolysis. Reason R : First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6-phosphate into fructose-1-6-diphosphate. In the light of the above statements, choose the correct answer from the options given below : (1) A is false but R is true. (2) Both A and R are true and R is the correct explanation of A. (3) Both A and R are true but R is NOT the correct explanation of A. (4) A is true but R is false.

Spraying sugarcane crop with which of the following plant growth regulators, increases the length of stem, thus, increasing the yield? (1) Abscisic acid (2) Auxin (3) Gibberellin (4) Cytokinin

Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants : (1) Cytokinin (2) ABA (3) Gibberellin (4) Ethylene

Identify the set of correct statements: A. The flowers of Vallisneria are colourful and produce nectar. B. The flowers of waterlily are not pollinated by water. C. In most of water-pollinated species, the pollen grains are protected from wetting. D. Pollen grains of some hydrophytes are long and ribbon like. E. In some hydrophytes, the pollen grains are carried passively inside water. Choose the correct answer from the options given below: (1) B, C, D and E only (2) C, D and E only (3) A, B, C and D only (4) A, C, D and E only

Given below are two statements: Assertion (A): Both wind and water pollinated flowers are not very colourful and do not produce nectar. Reason (R): The flowers produce enormous amount of pollen grains in wind and water pollinated flowers. In the light of the above statements, choose the correct answer from the options given below: (1) Both A and R are true and R is the correct explanation of A (2) Both A and R are true but R is NOT the correct explanation of A (3) A is true but R is false (4) A is false but R is true

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): A typical unfertilised, angiosperm embryo sac at maturity is 8 nucleate and 7-celled. Reason (R): The egg apparatus has 2 polar nuclei. In the light of the above statements, choose the correct answer from the options given below: (1) Both A and R are true and R is the correct explanation of A (2) Both A and R are true but R is NOT the correct explanation of A (3) A is true but R is false (4) A is false but R is true

Match List I with List II: List-I: A. Alfred Hershey and Martha Chase B. Euchromatin C. Frederick Griffith D. Heterochromatin. List-II: I. Streptococcus pneumoniae II. Densely packed and dark-stained III. Loosely packed and light-stained IV. DNA as genetic material confirmation. Choose the correct answer from the options given below: (1) A-II, B-IV, C-I, D-III (2) A-IV, B-II, C-I, D-III (3) A-IV, B-III, C-I, D-II (4) A-III, B-II, C-IV, D-I

Expressed Sequence Tags (ESTs) refers to (1) Certain important expressed genes. (2) All genes that are expressed as RNA. (3) All genes that are expressed as proteins. (4) All genes whether expressed or unexpressed.

Which are correct: A. Computed tomography and magnetic resonance imaging detect cancers of internal organs. B. Chemotherapeutics drugs are used to kill non-cancerous cells. C. α-interferon activate the cancer patients' immune system and helps in destroying the tumour. D. Chemotherapeutic drugs are biological response modifiers. E. In the case of leukaemia blood cell counts are decreased. Choose the correct answer from the options given below: (1) B and D only (2) D and E only (3) C and D only (4) A and C only

Streptokinase produced by bacterium Streptococcus is used for (1) Curd production (2) Ethanol production (3) Liver disease treatment (4) Removing clots from blood vessels

Which of following organisms cannot fix nitrogen? A. Azotobacter B. Oscillatoria C. Anabaena D. Volvox E. Nostoc. Choose the correct answer from the options given below: (1) A only (2) D only (3) B only (4) E only

Polymerase chain reaction (PCR) amplifies DNA following the equation. (1) N² (2) 2ⁿ (3) 2n+1 (4) 2N²

Hind II always cuts DNA molecules at a particular point called recognition sequence and it consists of: (1) 10 bp (2) 8 bp (3) 6 bp (4) 4 bp

Upon exposure to UV radiation, DNA stained with ethidium bromide will show (1) Bright orange colour (2) Bright red colour (3) Bright blue colour (4) Bright yellow colour

Epiphytes that are growing on a mango branch is an example of which of the following? (1) Commensalism (2) Mutualism (3) Predation (4) Amensalism

Given below are two statements: Statement I: The primary source of energy in an ecosystem is solar energy. Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP). In the light of the above statements, choose the most appropriate answer from the options given below: (1) Both statement I and statement II are correct (2) Both statement I and statement II are incorrect (3) Statement I is correct but statement II is incorrect (4) Statement I is incorrect but statement II is correct

Identify the correct statements : A. Detrivores perform fragmentation. B. The humus is further degraded by some microbes during mineralization. C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching. D. The detritus food chain begins with living organisms. E. Earthworms break down detritus into smaller particles by a process called catabolism. Choose the correct answer from the options given below : (1) D, E, A only (2) A, B, C only (3) B, C, D only (4) C, D, E only

Which one of the following is an example of ex-situ conservation? (1) National Park (2) Wildlife Sanctuary (3) Zoos and botanical gardens (4) Protected areas

These are regarded as major causes of biodiversity loss: A. Over exploitation B. Co-extinction C. Mutation D. Habitat loss and fragmentation E. Migration. Choose the correct option: (1) A, B and D only (2) A, C and D only (3) A, B, C and D only (4) A, B and E only