Question:
Which of the following activities is usually NOT performed during RNA processing in a eukaryotic cell?
Which of the following activities is usually NOT performed during RNA processing in a eukaryotic cell?
Show Hint
hnRNA processing includes: (1) 5' 7-methylguanosine capping, (2) 3' Poly-A tailing, (3) Intron splicing (exons are retained).
Updated On: Sep 15, 2026
- Addition of 5'cap
- Elimination of exons
- Addition of poly-A tail
- Elimination of introns
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Eukaryotic primary transcripts (hnRNA) undergo co-transcriptional and post-transcriptional processing to yield mature functional mRNA.
Step 2: Detailed Explanation:
Standard eukaryotic mRNA processing steps include:
1. 5' Capping: Addition of 7-methylguanosine ($m^7G$) cap to the 5' end.
2. 3' Polyadenylation: Cleavage and addition of a poly-A tail ($pprox 200\text{--}250$ adenylate residues) to the 3' end.
3. RNA Splicing: Precise excision and elimination of non-coding intervening sequences (introns) and covalent ligation of coding sequences (exons).
Exons are preserved and spliced together; they are not eliminated during standard processing.
Step 3: Final Answer:
Hence, elimination of exons is NOT performed.
Eukaryotic primary transcripts (hnRNA) undergo co-transcriptional and post-transcriptional processing to yield mature functional mRNA.
Step 2: Detailed Explanation:
Standard eukaryotic mRNA processing steps include:
1. 5' Capping: Addition of 7-methylguanosine ($m^7G$) cap to the 5' end.
2. 3' Polyadenylation: Cleavage and addition of a poly-A tail ($pprox 200\text{--}250$ adenylate residues) to the 3' end.
3. RNA Splicing: Precise excision and elimination of non-coding intervening sequences (introns) and covalent ligation of coding sequences (exons).
Exons are preserved and spliced together; they are not eliminated during standard processing.
Step 3: Final Answer:
Hence, elimination of exons is NOT performed.
Was this answer helpful?
0
0
Top ICAR AIEEA Plant Sciences Questions
- Both plant and animal cells contain some small organelles called 'peroxisomes', which are dedicated to the metabolism of substances such as
- Chemicals that store energy for the majority of work within cells are called
- The longest phase during the eukaryotic cell cycle is
- The formula: [Sum of (Observed-Expected)$^2$/Expected] is also known as
- Human beings have a large-sized 'proteome'. The principal and more significant reason for this is-
View More Questions
Top ICAR AIEEA Molecular Biology Questions
- Human beings have a large-sized 'proteome'. The principal and more significant reason for this is-
- The number of possible combinations in a polypeptide containing any 7 amino acids is given by the figure
Given below are two statements:
• [Statement (I):] Vertical resistance is exploited in agriculture by pathologists and breeders for crop improvement.
• [Statement (II):] Vertical resistance is mostly monogenic in nature.
In light of the above statements, choose the most appropriate answer from the options given below.
- Cannulae and Hami are the cellular structures found in
Given below are two statements, one is labelled as Assertion (A) and other labelled as Reason (R).
• [Assertion (A):] Deuteromycetes are known as 'Fungi Imperfecti'.
• [Reason (R):] In 'Deuteromycetes' only the asexual phase is known.
In light of the above statements, choose the correct answer from the options given below.
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions