MIUN Free NEET Quiz Unit 3

1. Cellulose is not a polymeric substance and a secondary metabolite.

2. The most abundant chemical in living organisms is not water.

3. Ricin is obtained from Ricinus communist plant.

4. The completion of prophase can be marked by centrosomes emitting no microtubules, instead of radiating out microtubules called asters.

5. In sexual reproduction when the two gametes fuse the chromosome number is restored to the value in the parent.

6. Cytoplasmic increase reflecting cell growth is a discontinuous event, and DNA synthesis is restricted to a single specific phase of the cycle.

7. The green coloured plastids are chloroplasts, which contain chlorophyll, whereas the other coloured plastids are chromoplasts, which may contain pigments like carotene and xanthophyll.

8. In studying and understanding the physiological and behavioural processes, one can take a physico-chemical approach and use cell-free systems to investigate.

9. Crossing over is the exchange of genetic material between two homologous chromosomes.

10. Physico-chemical approach of studying cells will tell us what types of organic compounds are present in living organisms.

11. Carotenoids are bright orange/red pigments obtained from plants.

12. S phase marks the phase of DNA replication and chromosome duplication.

13. G.N. Ramachandran discovery of the triple helical structure of collagen published in Nature in 1954 and his analysis of the allowed conformations of proteins through the use of the ‘Ramachandran plot’ rank among the most outstanding contributions in structural biology.

14. The sequence of events by which a cell duplicates its genome, synthesises the other constituents of the cell and eventually divides into two daughter cells is termed cell cycle.

15. Physico-chemical approach of studying cells will tell us what types of organic compounds (but not inorganic compounds) are present in living organisms.

16. Biomacromolecules may or may not exhibit a hierarchy of structures, including primary, secondary, tertiary, and quaternary.

17. Centrosome and centriole form the basal body of cilia and flagella that facilitate locomotion.

18. Biomacromolecules are made of identical building blocks.

19. Nucleic acids (RNA and DNA) are composed of nucleotides.

20. Lysosomes are single membrane structures containing enzymes for digestion of carbohydrates.

21. Prophase I is longer than pachytene.

22. Meiosis I is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the S phase.

23. Zygotene is characterised by the appearance of recombination nodules, the sites at which crossing over occurs between non-sister chromatids of the homologous chromosomes.

24. Meiosis II is initiated after the parental chromosomes have replicated to produce identical non-sister chromatids at the S phase.

25. Due to its close structural similarity with the substrate, the inhibitor competes with the substrate for the substrate-binding site of the enzyme.

26. Pyrimidines and purines are homocyclic.

27. The elemental composition of living tissues and non-living matter appear also to be similar when analysed qualitatively.

28. More than three types of macromolecules, including proteins, nucleic acids, and polysaccharides, are found in living systems.

29. A description of cell growth by division is inessential to understand about the cell.

30. Such vesicles are not empty of hydrolases, but instead show strong activity at acidic pH.

31. Based on the presence or absence of a membrane bound nucleus and other organelles, cells and hence organisms can be named as eukaryotic or prokaryotic.

32. Biomacromolecules are made of building blocks which are different.

33. Isolated lysosomal vesicles are not devoid of nucleases, which remain active at acidic pH.

34. Gametes are formed from specialised haploid cells.

35. In animal cells, chloroplasts are not responsible for trapping light energy essential for photosynthesis.

36. Some spices are primary metabolites.

37. Variety of complex locomotory and cytoskeletal structures present in the eukaryote.

38. G2 phase corresponds to the interval between mitosis and termination of M phase.

39. The telophase is the stage in which the nucleolus and nuclear membrane reappear.

40. G.N. Ramachandran passed away at the age of 45, on July 10, 1987.

41. The isolated lysosomal vesicles have been found to be very rich in proteases.

42. Malonate does not resemble the succinate.

43. Enzymes are proteins which catalyse biochemical reactions in the cells.

44. Proteins are denatured at high temperatures.

45. The Golgi body is a membranous organelle not composed of flattened sacs.

46. Lysosomes are single membrane structures not containing enzymes for digestion of carbohydrates.

47. The sites at which crossing over occurs between non-sister chromatids of the homologous chromosomes are recombination nodules.

48. The weight of a piece of liver or a leaf after complete dried is known as wet weight and while burnt it releases does not water vapour.

49. We studied meiosis during gametogenesis in plants and animals.

50. Compartmentalisation of cytoplasm is present in prokaryote.