Splicing
Trending Questions
Q. Which of the following does not occur during protein synthesis in eukaryotes?
- Formation of hnRNA
- Splicing
- Transport of m RNA from cytoplasm to nucleus
- Capping
Q.
RNA occurs in which part of the cell?
Q. The amino acid binding site of tRNA is
- anticodon loop
- TψC loop
- DHU loop
- 3’ end
Q.
What is the main function of RNA?
Q.
Name an enzyme required for transcription.
Q.
Removal of introns and joining the exons in a defined order in a transcription unit is called
splicing
capping
transformation
tailing
Q. The transcription initiation factor associated with the RNA polymerase holoenzyme in prokaryotes is
- β
- ω
- σ
- α
Q.
Why is RNA unstable?
Q.
The RNA polymerase holoenzyme transcribes the promoter, structural gene, and terminator. Justify this statement.
Q.
What is the biological significance of RNA?
Q.
What is self-splicing?
Q. A Polysome is formed by
- Cluster of ribosomes
- Cluster of mRNA attached to a ribosome
- Cluster of ribosomes attached to mRNA
- Cluster of mRNA
Q. Name the types of cells and the process by which hnRNA is formed. Describe the processing mechanism it undergoes before it becomes functional. [5]
Q. Which of the following does not occur during protein synthesis in eukaryotes?
- Formation of hnRNA
- Splicing
- Transport of m RNA from cytoplasm to nucleus
- Capping
Q. cDNA is
- Circular DNA
- Coiled DNA
- Cytoplasmic DNA
- Complementary DNA
Q. Sequence of AAT GCT TAG GCA on template segment of DNA will be represented over the transcribed mRNA as
TTA CGA ATC CGT
AAT GCT AAG GCA
UUA CGA AUC CGU
UUA CGT TUC CGU
Q. Spliceosomes are not found in cells of :
- Plants
- Fungi
- Animals
- Bacteria
Q.
What occurs during splicing?
Q.
What are the three types of RNAs?
Q. Removal of introns and joining of exons in a defined order during transcription is called
- Splicing
- Slicing
- Looping
- Inducing
Q. The central dogma of protein synthesis is
- DNA → DNA → mRNA → Protein
- mRNA → gRNA → DNA → Protein
- gRNA → DNA → mRNA → Protein
- DNA → gRNA → mRNA → Protein
Q. The mRNA carries genetic information from DNA, to which of the following organelle?
- Chloroplasts
- Mitochondria
- Lysosomes
- Ribosomes
Q. Which of the following organelle is the site for ribosome synthesis?
- Ribosomes
- Cytoplasm
- Nucleus
- Nucleolus
Q.
What happens if an intron is not spliced?
Q. 3'-ATGCTA-5' ... (A)
5'-TACGAT-3' ... (B)
In a hypothetical sequence of above given dsDNA if promoter is present at 5' of (A) strand and this DNA is involved in transcription, then what will be the correct sequence of mRNA ?
5'-TACGAT-3' ... (B)
In a hypothetical sequence of above given dsDNA if promoter is present at 5' of (A) strand and this DNA is involved in transcription, then what will be the correct sequence of mRNA ?
- 3'-AUCGUA-5'
- 3'-UAGCAU-5'
- 5'-UACGAU-3'
- 5'-AUCGUA-3'
Q. Spliceosomes can identify splicing areas in mRNA because they have
- Complementary exons and introns
- SnRNPs
- Varied proteins
- None of the above
Q. Site of formation of ribosomal precursor or ribosomal sub-units in a cell
- Nucleolus
- Stroma
- Nucleus body
- Nucleus
Q. Regarding the assertion and reason, select the correct option.
Assertion [A]: Spliceosomes edit mRNA.
Reasons [A]: Proteins in spliceosomes help in identifying the splicing sites in mRNA.
Assertion [A]: Spliceosomes edit mRNA.
Reasons [A]: Proteins in spliceosomes help in identifying the splicing sites in mRNA.
- A is true and R is false
- Both A and R are true and R explains A
- Both A and R are true, but R does not explain A
- Both A and R are false
Q. Spliceosomes are made up of
- introns and proteins
- monocistronic RNA and proteins
- snRNPs and proteins
- snRNPs and exons
Q. Select the correct option with respect to post- transcriptional changes in eukaryotes?
1. 5' end - capping - addition of adenylate residues
2. 3' end - tailing - addition of methyl guanosine triphosphate
3. 3' end- tailing - addition of adenylate residues
4. 5' end- capping - addition of methyl guanosine triphosphate
1. 5' end - capping - addition of adenylate residues
2. 3' end - tailing - addition of methyl guanosine triphosphate
3. 3' end- tailing - addition of adenylate residues
4. 5' end- capping - addition of methyl guanosine triphosphate
- 1, 2, 3
- 3, 4
- 1, 2, 3, 4
- 1, 2