Question

Transcription in eukaryotic cell takes place in
A) Nucleus
B) Ribosome
C) Endoplasmic reticulum
D) Golgi body
E) Cytoplasm

Answer 1

Hint: It is the membrane bound cell organelle that is present in the eukaryotic cell but absent in the prokaryotic cell. It contains the genetic material which is DNA and helps in maintaining the integrity of the cell by the help of transcription and replication processes.

Complete Answer:
- Nucleus is the membrane bound cell organelle in which process of transcription takes place in eukaryotic cells.
- Transcription is defined as the biochemical process through which the information in DNA strands copied to the RNA molecule. In the eukaryotic cell, transcription involves three steps:
1) Initiation
2) Elongation
3) Termination
These three steps were carried out with the help of the RNA polymerase.
- RNA polymerase is of three types which are present in the eukaryotic cells i.e., RNA polymerase I, RNA polymerase II, RNA polymerase III.
- In a prokaryotic cell, these three steps do not involve. Thus, in prokaryotic cells, RNA polymerase directly binds to the strands of DNA.
- In the eukaryotic transcription, DNA is packaged into the nucleosomes and to the higher order structures of chromatins. Eukaryotic transcription is much more complex than the prokaryotic transcription.

Thus, the correct answer is option A i.e., Nucleus.

Note: Nucleus is one of the most important membrane bound cell organelle found in the eukaryotic cells which contain certain genetic material i.e. DNA. Nucleus stores the cell's hereditary material. It also coordinates with activity of the cell which include growth, reproduction, synthesis of proteins etc. With the help of three steps the process of transcription takes place within the nucleus: initiation, elongation and termination.