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Q. No.The discontinuously synthesised fragments of DNA are joined by the enzyme
1. DNA ligase
2. DNA-dependent DNA polymerase
3. Phosphorylase
4. Topoisomerase
Subtopic: DNA Replication |
89%
From NCERT
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If E. coli completes the process of DNA replication within 38 minutes then the rate of polymerisation of DNA would be approximately
1. \(4.6 \times 10^6\) bp/second
2. 500 bp/second
3. 230 bp/second
4. 2000 bp/second
1. \(4.6 \times 10^6\) bp/second
2. 500 bp/second
3. 230 bp/second
4. 2000 bp/second
Subtopic: DNA Replication |
63%
From NCERT
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In a transcription unit, the promoter is located towards
1. 5' end of the templates strand
2. 5' end of the coding strand
3. 3' end of the non-template strand
4. 3' end of the sense strand
1. 5' end of the templates strand
2. 5' end of the coding strand
3. 3' end of the non-template strand
4. 3' end of the sense strand
Subtopic: Transcription |
78%
From NCERT
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If the sequence of bases in one of the DNA strand is A G G A G A A, then the sequence of bases in the other complementary strand of DNA would be
1. C C T T C T T
2. T C T C T C C
3. T C C T C T T
4. C C T C T C T
1. C C T T C T T
2. T C T C T C C
3. T C C T C T T
4. C C T C T C T
Subtopic: DNA Replication | Transcription |
93%
From NCERT
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A hypothetical sequence of a transcription unit is represented below
3'C G G A T A T C C A A T-5' Template strand
5' G C C T A T A G G T T A-3' Coding strand
If we switch the position of promoter with terminator in the above given transcription unit and transcriotion occurs then the sequence of RNA transcribed will be
1. 5'-C G G A U A U C C A A U-3'
2. 5'-G C C U A U A G G U U A-3'
3. 5'-A U U G G A U A U C C G-3'
4. 5'-U A A C C U A U A G G C-3'
3'C G G A T A T C C A A T-5' Template strand
5' G C C T A T A G G T T A-3' Coding strand
If we switch the position of promoter with terminator in the above given transcription unit and transcriotion occurs then the sequence of RNA transcribed will be
1. 5'-C G G A U A U C C A A U-3'
2. 5'-G C C U A U A G G U U A-3'
3. 5'-A U U G G A U A U C C G-3'
4. 5'-U A A C C U A U A G G C-3'
Subtopic: Transcription |
From NCERT
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Select the incorrect statement from the following
1. In most of the eukaryotes, the structural gene in monocistronic
2. Exons are the expressed sequence of genes
3. Introns do not appear in processed RNA
4. A gene does not code for tRNA
1. In most of the eukaryotes, the structural gene in monocistronic
2. Exons are the expressed sequence of genes
3. Introns do not appear in processed RNA
4. A gene does not code for tRNA
Subtopic: Transcription |
75%
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Subtopic: DNA Double Helix |
91%
From NCERT
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In eukaryotes, rRNAs are transcribed by
1. RNA polymerase I and III
2. RNA polymerase III only
3. RNA polymerase I and II
4. RNA polymerase I only
1. RNA polymerase I and III
2. RNA polymerase III only
3. RNA polymerase I and II
4. RNA polymerase I only
Subtopic: Transcription |
From NCERT
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Match the following columns and select the correct option
1. a(i), b(ii), c(iii), d(iv)
| Column I (Genes of lac operon) |
Column II (Function) |
||
| a. | Operator gene | (i) | Interacts with repressor protein |
| b. | Promoter gene | (ii) | Transcribes mRNA for polypeptide synthesis |
| c. | Structural gene | (iii) | Provides attachment site for RNA polymerase |
| d. | Regulator gene | (iv) | Controls the activity of operator gene |
1. a(i), b(ii), c(iii), d(iv)
2. a(iv), b(iii), c(ii), d(i)
3. a(i), b(iii), c(ii), d(iv)
4. a(iv), b(ii), c(iii), d(i)
Subtopic: Gene Regulation: Lac Operon |
68%
From NCERT
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Which of the following RNA is a carrier that delivers the correct amino acid for protein synthesis?
1. mRNA
2. rRNA
3. hnRNA
4. tRNA
1. mRNA
2. rRNA
3. hnRNA
4. tRNA
Subtopic: Translation |
69%
From NCERT
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