1
Question
Write short note on nucleus.
Open in App
Solution
- Nucleus was first observed by Leeuwenhoek in the RBCs of fishes.
- The term 'Nucleus' was coined by Robert Brown in 1831.
- Nucleus is a double membrane bound dense protoplasmic body.
- It encloses the genetic information of the cell which means that the genetic material (DNA or RNA) is present in it.
- It is absent in prokaryotes and mature RBCs in case of eukaryotes.
- Depending upon the number of nucleus, a cell may be uninucleate, binucleate or multinucleate.
- The shape of nucleus may be discoid, ovoid, spherical, bilobed or multilobed.
- The outermost double layered covering of nucleus is called nuclear membrane or karyotheca or nuclear envelope.
- The nuclear envelop consists of many pores called nuclear pores.
- The nucleus is filled with nucleoplasm which contains chromatin i.e. thread like structures of DNA.
- Within the nucleus is present nucleolus which is a spherical body seen during interphase.
- Nucleus was first observed by Leeuwenhoek in the RBCs of fishes.
- The term 'Nucleus' was coined by Robert Brown in 1831.
- Nucleus is a double membrane bound dense protoplasmic body.
- It encloses the genetic information of the cell which means that the genetic material (DNA or RNA) is present in it.
- It is absent in prokaryotes and mature RBCs in case of eukaryotes.
- Depending upon the number of nucleus, a cell may be uninucleate, binucleate or multinucleate.
- The shape of nucleus may be discoid, ovoid, spherical, bilobed or multilobed.
- The outermost double layered covering of nucleus is called nuclear membrane or karyotheca or nuclear envelope.
- The nuclear envelop consists of many pores called nuclear pores.
- The nucleus is filled with nucleoplasm which contains chromatin i.e. thread like structures of DNA.
- Within the nucleus is present nucleolus which is a spherical body seen during interphase.
Suggest Corrections
4
Similar questions