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Q. No.Given below are two statements
I:
The process of transcription in eukaryotes with additional complexities -There are at least three RNA polymerases in the nucleus with clear cut division of labor. The RNA polymerase I transcribes rRNAs whereas the RNA polymerase III is responsible for transcription of tRNA, 5S rRNA and snRNAs. The RNA polymerase II transcribes precursor of mRNA and hnRNA.
II:
The primary transcripts contain both the exons and introns are non-functional. It is subjected to a process of splicing whereas the introns are removed and exons are joined in a defined order. hnRNA undergoes additional processing called as capping and tailing.
In light of the above statements, choose the most appropriate answer from the options given below
1. Both statement I and statement II are true
2. Both statement I and statement II are false
3. Statement I is true but statement II is false
4. Statement I is false but statement II is true
Subtopic: Transcription |
78%
From NCERT
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In lac operon, operator sequence/region binds with
1. Regulatory gene to switch off the operon
2. Repressor protein to switch on the structural genes
3. Repressor protein to switch off the structural genes
4. Inducer to switch on the operon
1. Regulatory gene to switch off the operon
2. Repressor protein to switch on the structural genes
3. Repressor protein to switch off the structural genes
4. Inducer to switch on the operon
Subtopic: Gene Regulation: Lac Operon |
59%
From NCERT
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Arrange in the correct sequence.
A. Isolation of DNA
B. Hybridisation using labeled VNTR probe
C. Digestion of DNA by restriction endonucleases
D. Separation of DNA fragments by electrophoresis
E. Blotting of separated DNA fragmented to synthetic membranes
Choose the correct answer from the options given below
1. A → E → B → C → D
2. A → C → E → B → D
3. A → C → D → E → B
4. A → D → C → B → E
A. Isolation of DNA
B. Hybridisation using labeled VNTR probe
C. Digestion of DNA by restriction endonucleases
D. Separation of DNA fragments by electrophoresis
E. Blotting of separated DNA fragmented to synthetic membranes
Choose the correct answer from the options given below
1. A → E → B → C → D
2. A → C → E → B → D
3. A → C → D → E → B
4. A → D → C → B → E
Subtopic: DNA Fingerprinting |
84%
From NCERT
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The salient features of genetic code are
A. The codon is triplet, 61 codons for amino acids & 3 codons do not code for any amino acid, they function as stop codon
B. The codon is read in mRNA in contiguous fashion, no punctuations
C. UAA, UAG, UGA are stop terminator codons
D. Some codes are universal
E. AUG has dual function, it codes for phenylalanine (Phe) and it also acts as terminate the process
Choose the correct answer from the options given below:
1. A, B, D only
2. A, B, C only
3. A, B, D, E oly
4. A & E only
A. The codon is triplet, 61 codons for amino acids & 3 codons do not code for any amino acid, they function as stop codon
B. The codon is read in mRNA in contiguous fashion, no punctuations
C. UAA, UAG, UGA are stop terminator codons
D. Some codes are universal
E. AUG has dual function, it codes for phenylalanine (Phe) and it also acts as terminate the process
Choose the correct answer from the options given below:
1. A, B, D only
2. A, B, C only
3. A, B, D, E oly
4. A & E only
Subtopic: Genetic Code |
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Reverse transcriptase is an enzyme encoded in the genetic material of retroviruses that catalyzes the transcription of retroviral genetic material. The enzymatic activity of reverse transcriptase is
1. DNA-dependent RNA polymerase
2. DNA-dependent DNA polymerase
3. RNA-dependent DNA polymerase
4. RNA-dependent RNA polymerase
1. DNA-dependent RNA polymerase
2. DNA-dependent DNA polymerase
3. RNA-dependent DNA polymerase
4. RNA-dependent RNA polymerase
Subtopic: The DNA |
63%
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In the Lac operon
A. i gene codes for the repressor
B. y gene codes for transacetylase
C. z gene codes for beta-galactosidase
D. Allolactose activates repressor
E. Repressor protein prevents RNA polymerase action by binding to promoter
Choose the correct answer from the options given below:
1. B and C only
2. A and C only
3. B, C and E only
4. A, C and E only
A. i gene codes for the repressor
B. y gene codes for transacetylase
C. z gene codes for beta-galactosidase
D. Allolactose activates repressor
E. Repressor protein prevents RNA polymerase action by binding to promoter
Choose the correct answer from the options given below:
1. B and C only
2. A and C only
3. B, C and E only
4. A, C and E only
Subtopic: Gene Regulation: Lac Operon |
From NCERT
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Match List I with List II
Choose the correct answer from the options given below:
1. A - (I); B - (II); C - (III); D - (IV)
2. A - (II); B - (III); C - (IV); D - (I)
3. A - (III); B - (IV); C - (II); D - (I)
4. A - (II); B - (III); C - (I); D - (IV)
| List I | List II |
| A. Ribosomal-RNA synthesis | I. Mitochondrial matrix |
| B. Protein synthesis | II. Nucleolus |
| C. Transfer-RNA synthesis | III. Ribosomes |
| D. mtDNA | IV. Nucleus |
1. A - (I); B - (II); C - (III); D - (IV)
2. A - (II); B - (III); C - (IV); D - (I)
3. A - (III); B - (IV); C - (II); D - (I)
4. A - (II); B - (III); C - (I); D - (IV)
Subtopic: Transcription |
65%
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Match List I with List II
Choose the correct answer from the options given below:
1. A - (II); B - (III); C - (I); D - (IV)
2. A - (III); B - (IV); C - (I); D - (II)
3. A - (IV); B - (II); C - (III); D - (I)
4. A - (II); B - (I); C - (IV); D - (III)
| List I | List II |
| A. Matthew Meselson and Franklin Stahl | I. DNA is the genetic material |
| B. Alfred Hershey and Martha Chase | II. Semi-Conservative replication of DNA |
| C. Frederick Griffith | III. "Transforming principle" in DNA |
| D. Avery, MacLeod and McCarty | IV. Discovery of pneumococcal transformation |
1. A - (II); B - (III); C - (I); D - (IV)
2. A - (III); B - (IV); C - (I); D - (II)
3. A - (IV); B - (II); C - (III); D - (I)
4. A - (II); B - (I); C - (IV); D - (III)
Subtopic: DNA Replication | Search for Genetic Material |
67%
From NCERT
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Subtopic: Genetic Code |
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Subtopic: DNA Replication | Transcription |
90%
From NCERT
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