Question:
Explain the processing of heterogeneous nuclear RNA (hnRNA) into a fully functional mRNA in eukaryotes. Where does this processing occur in the cell?
Explain the processing of heterogeneous nuclear RNA (hnRNA) into a fully functional mRNA in eukaryotes. Where does this processing occur in the cell?
Show Hint
mRNA processing ensures the stability and proper translation of genetic information in eukaryotic cells.
Updated On: Jan 29, 2025
Hide Solution
Verified By Collegedunia
Solution and Explanation
The processing of hnRNA into mRNA in eukaryotes involves the following steps:
- Capping: A methyl guanosine cap is added to the 5’ end of hnRNA, ensuring stability and aiding in ribosome recognition.
- Tailing: A poly-A tail is added to the 3’ end of hnRNA to prevent degradation and enhance translation.
- Splicing: Introns (non-coding regions) are removed, and exons (coding regions) are joined together to form a functional mRNA. This processing occurs in the nucleus of eukaryotic cells.
Was this answer helpful?
0
0
Top Questions on Proteins
- Which of the following structures in the cell is responsible for producing proteins?
(a) What is the difference between native protein and denatured protein?
- (b) Amino acids show amphoteric behaviour, why?
- Which of the following is/are examples of denaturation of protein?
- Identify the incorrect statements.
(A) Bacillus thuringiensis is a transgenic organism.
(B) Bt toxin enters the testes or the ovaries of the insect pest, sterilizes it, and thus prevents its multiplication.
(C) Proteins encoded by cryIAc and cryIIAb control cotton bollworms.
(D) Bt protein exists as an active toxin in Bacillus.
(E) Alkaline pH of the insect gut solubilizes the toxin protein crystals.
Choose the correct answer from the options given below:
View More Questions
Questions Asked in CBSE CLASS XII exam
- A bilobed dithecous anther has 200 microspore mother cells per microsporangium. How many male gametophytes can be produced by this anther?
- CBSE CLASS XII - 2025
- Development of male and female gametophyte
- Two slits 0.1 mm apart are arranged 1.20 m from a screen. Light of wavelength 600 nm from a distant source is incident on the slits.
- CBSE CLASS XII - 2025
- Wave optics
- Define a wavefront. An incident plane wave falls on a convex lens and gets refracted through it. Draw a diagram to show the incident and re fracted wavefront.
- CBSE CLASS XII - 2025
- Wave optics
- A beam of light coming from a distant source is refracted by a spherical glass ball (refractive index 1.5) of radius 15 cm. Draw the ray diagram and obtain the position of the final image formed.
- CBSE CLASS XII - 2025
- Wave optics
- In the figure, curved lines represent equipotential surfaces. A charge \( Q \) is moved along different paths A, B, C, and D. The work done on the charge will be maximum along the path:
- CBSE CLASS XII - 2025
- Electrostatics
View More Questions