Question

27. Give the chemical nature of nucleolus.
28. How many chromosomes does a human normal diploid cell has?
29. State the function of secondary constriction.
30. Of which substance is chromatin made?
31. Enlist components of nucleus.
32. Which stain is employed to study chromosomes?
33. Name the organism with minimal chromosomes number.
34. Why is nucleus called "director of cell"?
35.State one difference between euchromatin and heterochromatin.
36. Which cell organelle is well developed in secretory cells?
37. Why the lysosomes are called the "cleaners” of cell waste?
38. Why are the chloroplasts called "Kitchens of the cell”?
39. Why are the ribosomes called protein factories?
40. What is chemical nature of ribosomes?
41. Why is Golgi body called condensation membrane?
42. Name two types of plastids.
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Answer 1

Ans.42 the

two types of plasmids are :

*R plasmid- called the restriction plasmid

*F plasmid - fertility plasmid.