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Q. No.A primary transcript formed a DNA segment has 13% of the bases as uracil. what percent of the bases in coding strand of DNA is 5-methyl uracil?
1. 26%
2. 37%
3. 13%
4. 12%
Subtopic: DNA Double Helix |
83%
From NCERT
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Which of the following fragments of DNA (for reference only template strand is given) requires more energy for replication?
1. 5' C G A T T A C G 3'
2. 5' A T A C C G A G 3'
3. 5' C C G G A C A G 3'
4. 5' A A T A A A G C 3'
1. 5' C G A T T A C G 3'
2. 5' A T A C C G A G 3'
3. 5' C C G G A C A G 3'
4. 5' A A T A A A G C 3'
Subtopic: DNA Replication |
63%
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DNA replication is different in bacteria as compared to that of human cells because in the former:
| 1. | DNA has a single origin of replication |
| 2. | Four types of deoxyribonucleotides are activated into triphosphate state |
| 3. | Does not require unwinding of helix |
| 4. | A single replication fork is formed |
Subtopic: DNA Replication |
61%
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A bacterium that completes its duplication in 20 minutes and has light DNA is now growing in medium containing 15NH4Cl as the only source of nitrogen. After 60 minutes, what percent of the progeny would produce next generation having hybrid DNA when transferred to normal medium?
1. 25%
2. 100%
3. 50%
4. 75%
1. 25%
2. 100%
3. 50%
4. 75%
Subtopic: DNA Replication |
From NCERT
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Phosphodiester linkage in DNA:
| 1. | Joins adenine with ribose sugar |
| 2. | Connects a phosphate group to OH of 5'C of a nucleoside |
| 3. | Forms a nucleoside |
| 4. | Forms a dinucleotide |
Subtopic: The DNA |
62%
From NCERT
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In prokaryotes, the sigma subunit of RNA polymerase:
| 1. | Allows the polymerase to identify the different promoters |
| 2. | Alter the rate of translation |
| 3. | Allows the ribosomal subunit to attach the mRNA |
| 4. | Can change the process of translation in different types of cells |
Subtopic: Transcription |
63%
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How many phosphodiester bonds are present in genetic material of \(\phi\) × 174 bacteriophage?
1. 48501
2. 5385
3. 5384
4. 5386
Subtopic: DNA Double Helix |
68%
From NCERT
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The synthesis of RNA that has the sequence of codes for polypeptide (i.e., a component of haemoglobin), is catalysed by:
1. Primase
2. RNA polymerase III
3. RNA polymerase I
4. RNA polymerase II
1. Primase
2. RNA polymerase III
3. RNA polymerase I
4. RNA polymerase II
Subtopic: Transcription |
55%
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Which of the following statements is true regarding ribozyme?
| 1. | It is a molecule that catalyses the association of two units of a ribosome |
| 2. | It is an enzyme that synthesizes RNA |
| 3. | It is a polymer of ribonucleotides |
| 4. | It is an enzyme using RNA as substrate |
Subtopic: Transcription |
From NCERT
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In eukaryotes, the RNA that has both unwanted base sequence alternated with useful base sequence is synthesized by:
1. Sigma (\(\sigma \)) factor
2. RNA polymerase II
3. Rho (\(\rho\)) factor
4. RNA primase
1. Sigma (\(\sigma \)) factor
2. RNA polymerase II
3. Rho (\(\rho\)) factor
4. RNA primase
Subtopic: Transcription |
67%
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