Cell Biology, Plant Physiology, Reproduction in Plants, Ecology, Evolution, Biotechnology, Microbes, Biodiversity
๐ NEET Biology Mock Test
Q1. Which cell organelle is directly involved in detoxification of drugs in liver cells?
A. Golgi apparatus
B. Smooth endoplasmic reticulum
C. Lysosome
D. Peroxisome
Answer: B
Q2. Cristae are absent in which of the following?
A. Liver mitochondria
B. Muscle mitochondria
C. Prokaryotic cells
D. Plant mitochondria
Answer: C
Q3. Which stage of cell cycle shows maximum protein synthesis?
A. S phase
B. G1 phase
C. G2 phase
D. M phase
Answer: B
Q4. Which enzyme is responsible for removal of RNA primer during DNA replication in prokaryotes?
A. DNA ligase
B. DNA polymerase I
C. DNA polymerase III
D. Primase
Answer: B
Q5. Pollen viability is longest in:
A. Wheat
B. Rice
C. Rosaceae members
D. Pea
Answer: C
Q6. Which structure guides pollen tube entry into embryo sac?
A. Synergids
B. Antipodals
C. Egg cell
D. Central cell
Answer: A
Q7. Double fertilization results in formation of:
A. Zygote only
B. Endosperm only
C. Zygote and endosperm
D. Embryo sac
Answer: C
Q8. In gymnosperms, pollination occurs through:
A. Water
B. Insects
C. Wind
D. Animals
Answer: C
Q9. Which of the following is a characteristic feature of bryophytes?
A. Dominant sporophyte
B. Vascular tissue present
C. Water required for fertilization
D. Seeds present
Answer: C
Q10. Sporophylls are found in:
A. Bryophytes
B. Pteridophytes
C. Algae
D. Fungi
Answer: B
Q11. Homologous structures indicate:
A. Adaptive radiation
B. Convergent evolution
C. Divergent evolution
D. Parallel evolution
Answer: C
Q12. Which fossil is considered as a connecting link between reptiles and birds?
A. Archaeopteryx
B. Australopithecus
C. Ramapithecus
D. Neanderthal
Answer: A
Q13. Adaptive radiation is best explained by:
A. Darwin’s finches
B. Industrial melanism
C. Fossil records
D. Gene flow
Answer: A
Q14. Which factor does NOT disturb Hardy–Weinberg equilibrium?
A. Mutation
B. Random mating
C. Gene migration
D. Natural selection
Answer: B
Q15. Population interaction where one species benefits and other is unaffected is called:
A. Parasitism
B. Mutualism
C. Commensalism
D. Amensalism
Answer: C
Q16. Logistic population growth is represented by:
A. J-shaped curve
B. Straight line
C. S-shaped curve
D. Zig-zag curve
Answer: C
Q17. Carrying capacity refers to:
A. Maximum birth rate
B. Maximum death rate
C. Maximum population an environment can support
D. Population at equilibrium
Answer: C
Q18. Which trophic level has maximum energy?
A. Top carnivores
B. Primary consumers
C. Secondary consumers
D. Producers
Answer: D
Q19. Energy flow in ecosystem is:
A. Cyclic
B. Bidirectional
C. Unidirectional
D. Random
Answer: C
Q20. Pyramid of energy is always:
A. Inverted
B. Spindle-shaped
C. Upright
D. Irregular
Answer: C
Q21. Which biome has maximum biodiversity?
A. Tundra
B. Desert
C. Tropical rainforest
D. Grassland
Answer: C
Q22. Biodiversity hotspot must have:
A. High endemic species
B. Large area
C. Cold climate
D. Low rainfall
Answer: A
Q23. Which is NOT an in-situ conservation method?
A. Wildlife sanctuary
B. National park
C. Biosphere reserve
D. Seed bank
Answer: D
Q24. The Red Data Book is published by:
A. WHO
B. WWF
C. IUCN
D. UNEP
Answer: C
Q25. Endangered species are those which:
A. Are already extinct
B. Are abundant
C. Face high risk of extinction
D. Live only in zoos
Answer: C
Q26. Which microorganism is used in sewage treatment?
A. Methanogens
B. Cyanobacteria
C. Protozoans
D. Viruses
Answer: A
Q27. Activated sludge contains:
A. Pathogenic bacteria
B. Anaerobic bacteria
C. Aerobic microbes
D. Fungi only
Answer: C
Q28. Which antibiotic was first discovered?
A. Streptomycin
B. Penicillin
C. Tetracycline
D. Erythromycin
Answer: B
Q29. Baker’s yeast is scientifically known as:
A. Candida albicans
B. Aspergillus niger
C. Saccharomyces cerevisiae
D. Rhizopus stolonifer
Answer: C
Q30. Biogas major component is:
A. CO₂
B. H₂
C. CH₄
D. O₂
Answer: C
Q31. Restriction enzymes belong to which class?
A. Ligases
B. Isomerases
C. Nucleases
D. Polymerases
Answer: C
Q32. Plasmids are:
A. Linear DNA
B. Circular DNA
C. RNA molecules
D. Proteins
Answer: B
Q33. Which vector is commonly used in genetic engineering?
A. Virus
B. Plasmid
C. Ribosome
D. Lysosome
Answer: B
Q34. Which enzyme joins DNA fragments?
A. Helicase
B. Ligase
C. Primase
D. Endonuclease
Answer: B
Q35. Bt toxin gene is obtained from:
A. Bacillus anthracis
B. Bacillus thuringiensis
C. Bacillus subtilis
D. Bacillus cereus
Answer: B
Q36. Golden rice is rich in:
A. Vitamin C
B. Vitamin A
C. Vitamin D
D. Vitamin B12
Answer: B
Q37. RNA interference is used to:
A. Increase gene expression
B. Block mRNA
C. Enhance translation
D. Modify DNA
Answer: B
Q38. Light reaction of photosynthesis occurs in:
A. Stroma
B. Thylakoid membrane
C. Cytoplasm
D. Outer membrane
Answer: B
Q39. RuBisCO is involved in:
A. Photolysis
B. CO₂ fixation
C. ATP synthesis
D. Oxygen evolution
Answer: B
Q40. Photorespiration occurs mainly in:
A. C₄ plants
B. CAM plants
C. C₃ plants
D. Algae
Answer: C
Q41. Opening and closing of stomata is regulated by:
A. Guard cells
B. Epidermal cells
C. Root hairs
D. Xylem
Answer: A
Q42. Translocation of food occurs through:
A. Xylem
B. Phloem
C. Cortex
D. Cambium
Answer: B
Q43. Nitrogen fixation converts N₂ into:
A. Nitrate
B. Nitrite
C. Ammonia
D. Protein
Answer: C
Q44. Symbiotic nitrogen fixation occurs in:
A. Azotobacter
B. Rhizobium
C. Clostridium
D. Nostoc
Answer: B
Q45. Which element is a component of chlorophyll?
A. Iron
B. Magnesium
C. Calcium
D. Nitrogen
Answer: B
Q46. Lysosomes contain enzymes active at:
A. Neutral pH
B. Alkaline pH
C. Acidic pH
D. Variable pH
Answer: C
Q47. Which organelle is absent in prokaryotes?
A. Ribosome
B. Plasma membrane
C. Nuclear membrane
D. Cell wall
Answer: C
Q48. Virus is considered non-living because:
A. It lacks DNA
B. It lacks metabolism outside host
C. It cannot mutate
D. It cannot infect
Answer: B
Q49. Which greenhouse gas has highest global warming potential?
A. CO₂
B. CH₄
C. N₂O
D. CFCs
Answer: D
Q50. Ozone depletion is mainly caused by:
A. CO₂
B. SO₂
C. CFCs
D. Methane
Answer: C
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