Botany MCQs

2nd Year Biology Notes

 

Botany MCQs Karachi Board BISE Karachi Notes



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1. When the plasmolysed cells are again placed in water, there is a
recovery to the original condition due to endosmosis of water. This is
called __________.



(Plasmolysis, Incipient Plasmolysis, Complete Plasmolysis, Deplasmolysis)



2. Rizobium is found in __________.



(Roots of wheat, Roots of rice, Root-nodules of pea, Deplasmolysis)



3. The oxygen released in photosynthesis comes from __________.



(Carbon dioxide, Carbohydrates, Water, None of above)



4. Cell organella related with respiration is __________.



(Mitochondria, Centriole, Coldgi Body, Nucleus)



5. The end products of glycolysis is __________.



(Citric Acid, Pyruvic Acid, Ethyl alcohol, Glyceraldehyde)



6. Positive geotropism is observed in __________.



(Primary roots, Sucking roots, Aerial roots, None of these)



7. Absorption of water by roots is increased when __________.



(Transpiration rate is less, Salt absorption is increased, Transpiratin rate is incrreased. Photosynthesis rate is increased)



8. In plant cell vacuole contains __________.



(Gases, Vacuum, Dissolved Mineral salts, Water)



9. The union of male and female gametes results in the formation of __________.



(Aplanospore, Meiospore, Zygote, None of these)



10. Enzymes are basically __________.



(Proteins, Vitamins, Fats, Carbohydrates)



11. Semi-permeability is the property of __________.



(Plasma Membrane, Cell wall, Colgi body, Endoplasmic Reticulum)



12. The initial stage of water absorption by root cell is by __________.



(Osmosis, Imbibition, Absorption, Diffusion)



13. Duplication of DNA is called __________.



(Transduction, Transcription, Translation, Replication)



14. Watson and Crick are credited for finding __________.



(DNA is the carrier of genetic information, DNA is a double-stranded
helix, RNA is a double-stranded helix, DNA is composed of sugar,
phosphoric acid and nitrogenous bases)



15. __________ is the unit of inheritance.



(Phenotype, Genotype, Gene, None of these)



16. __________ organalle is related with genetic engineering.



(Plastids, Plasmids, Mutations, Hybrid Vigour)



17. The pollen tube which moves through the style towards ovary is an example of __________.



(Phototropism, Thigmotropism, Hydrotropism, None of these)



18. Cytokinins promote __________.



(Cell division, Apical growth, Tallness, Dwarfness)



19. The number of chromosomes in humans is __________.



(56, 46, 36)



20. The tendency of genes to remain together is called __________.



(Linkage, Crossing over, Gena mutation)



21. Cross fertilization of phenotypically dominant individual with a homozygous recessive individual is __________.



(Dihybrid cross, Munohybrid Cross, Test Cross)



22. Cytokinesis is the division of __________.



(Nucleus, Cytoplasm, Vacuole)

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23. Inheritance of acquired characters was suggested by __________.



(Wallace, Aristotle, Lamarck)



24. Translocation of organic food substances takes place through __________.



(Xylem, Phloem, Endodermis)



25. Absorption of water and mineral salts from the soil takes place through __________.



(Older roots, Younger roots, Both of them)



26. Respiration in plants takes place during __________.



(Day time only, Night time only, Day and night both)



27. Process of transpiration is effected by __________.



(Light only, temperature only, both of these)



28. Mitosis takes place in __________.



(Somatic Cell, Sickle cell, Zylem Cell)



29. Transpiration is necessary for __________.



(Movement of Curvature, Synthesis of food material, Conduction of Water)



30. Munch Hypothesis was proposed to explain __________.



(Translocation, Ascent of Sap, Transpiration)



31. Human male set of chromosomes is __________.



(44 + xy, 44 + xx, 44 + 00)



32. The first stable compound formed during photosynthesis is __________.



(ATP, 3PGA, Pyruvic Acid)



33. During Meiosis crossing over takes place at __________.



(Leptotene, Diplotene, Diakenesis)



34. Paleontology evidences are considered as evidence of __________.



(Vestiges, Fossils, Embryo)



35. The genotype of Hybrid is __________.



(T, Tt, tt)



36. The blood group of a man with neither antigens is __________.



(‘O’ Group, ‘A’ Group, ‘AB’ Group)



37. The changes in chromosomes are called __________.



(Linkage, Crossing over, Chromosomal aberration)



38. The growth in plants can be measured by __________.



(Photometer, Respirometer, Auxanometer)



39. Oxygen is evolved during photosynthesis from __________.



(Water, Carbon dioxide, Carbohydrate)



40. The two chromatics of each chromosome are held together at __________.



(Centromere, Centrosome, Chiasma)



41. The sex-linked character in man is __________.



(Hieght, Colour-blindness, Colour of skin)



42. A bacterial cell divides by __________.



(Mitosis, Amitosis, Meiosis)



43. Gene pool is the sum total of __________.



(Genes, Gene frequency, Gene in population)



44. Karyokinesis is the division of __________.



(Nucleus, Cytoplasm, Vacuole)



45. The cell wall is __________.



(Permeable, Impermeable, Semipermeable)



46. The opening and closing of stomata are controlled by __________.



(Stomatal cells, Guard cells, Zylem Cells)



47. The physical process in which water is sucked up by a certain dry or semi-dry material is __________.



(Diffusion, Imbibition, Osmosis, Plasmolysis)



48. Inheritance and variation in living things is explained by __________.



(Ecology, Genetics, Taxonomy, Anatomy)



49. The relative time of day and night to which plant is exposed is __________.



(Photophosphorylation, Phototaxis, Photoperiodism, Phototropism)



50. In meiosis, the snapsis of homologous chromosomes takes place at this sub stage __________.



(Pachytene, Zygotene, Leptotene, Diplotene)



51. The human blood genetic disease in which the red blood cells become of abnormal shape is called __________.



(Anemia, Pneumonia, Insomnia, Sickle-cell anemia)