1. If a stock has 2n=48 and scion microspore mother cell has 2n=24, then root cells and microspore will have _____ chromosomes respectively
2. Poleward movement of dyads occur in
3. How many meiotic divisions would be required to produce 100 female gametophytes in an angiosperm?
4. The period of active mitosis varies from
5. Diploid amount of nuclear DNA and haploid number of chromosomes are characteristic feature of
6. How many successive generations of mitosis must occur to produce 1024 cells?
7. An egg cell has 5 pg of DNA in its nucleus. How much amount of DNA will be in this animal at the enf of G2 phase mitosis?
8. Synaptonemal complex is a ribo-nucleo protein structure visible from
9. Mitosis was observed in animal cells by
10. Exchange of chromosomal parts between non-homologous chromosomes is called
11. As the chromosome splits into two chromatids and migrated towards poles
12. Which of the following is true of kinetochores ?
13. Which is the longest stage of prophase I of Meiosis I ?
14. Anaphase stage is characterised by all the following features except
15. In which stage of cell cycle, cell enters into Go phase?
16. Which organelle is commonly referred to as the 'traffic police' of the cell?
17. Mitochondrial ribosome is
18. Golgi apparatus of plants and lower invertebrates are usually referred to as
19. Which of the following possess cytoskeleton?
20. In the fluid- mosaic model, of plasma membrane the proteins found are
21. Largest eukaryotic normal chromosome is found in
22. A peice of carrot and a flower is put in water separately. The water becomes purple in case of carrot but remain colourless in flower case. It is because
23. In fruits and flowers, colour pigments are located in
24. A cell that lacks nucleus will also lack
25. Lipids and protein contents in all membranes are in the ratio
26. Water balance of cell is maintained by
27. A cell organelle common in Protista and Monera is
28. Starch grains in potato are found in
29. An organelle that has no DNA but capable of duplication is
30. Which of the following are called ribosome production factories?
31. Nuclear membrane re appears at
32. Terminalisation occurs during.
33. Cross like configurations when nonsister chromatide of a bivalent come in contact during first meiotic division are
34. The number of chromatids at metaphase is
35. The sequences of cell cycle is
36. Selective and specific pairing of homologous chromosomes during pachytene stage of meiosis is
37. Reduction of chromosome number occur during
38. Number of chromosomes group at equatorial plate of metaphase I of a plant body having 2n = 50 chromosomes shall be
39. Karyokinesis differs from cytokinesis as it involve the division of
40. Centriole replicate during
41. DNA synthesis takesplace during
42. Nucleolus disappear during
43. Endomitosis is.
44. In synapsis the two homologous chromomeres are connected at.
45. Crossing over results in
46. In meiosis centromers divide during
47. During cell cycle RNA and proteins are synthesized in
48. 'V' Shaped chromosomes are.
49. The material most commonly using to study mitosis is