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Q. No.A section of doublestranded DNA is composed of 22% Adenine bases. What is the percentage of Guanine bases in the section of DNA?
1. 22%
2. 28%
3. 44%
4. 56%
Subtopic: The DNA | DNA Double Helix |
83%
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Subtopic: DNA vs RNA as Genetic Material |
51%
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Which of the following bonds is not associated with a deoxyribonucleotide?
1. Phosphoester bond
2. Glycosidic bond
3. Phosphodiester bond
4. more than one option is correct
1. Phosphoester bond
2. Glycosidic bond
3. Phosphodiester bond
4. more than one option is correct
Subtopic: The DNA |
From NCERT
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RNA possesses additional _______ group at _______ position in the sugar than the DNA
1. OH, 5'
2. H, 2'
3. OH, 2'
4. H, 5'
1. OH, 5'
2. H, 2'
3. OH, 2'
4. H, 5'
Subtopic: DNA vs RNA as Genetic Material |
85%
From NCERT
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Hallmark of the Watson and crick three dimensional DNA model was based upon the finding of
1. Wilkins and Franklin
2. Erwin chargaff
3. Hershey and chase
4. Meselson and stahi
1. Wilkins and Franklin
2. Erwin chargaff
3. Hershey and chase
4. Meselson and stahi
Subtopic: DNA Double Helix |
From NCERT
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Choose the correct steps in the organisation of eukaryotic chromosome
| 1. | Nucleosome | → | Solenoid | → | Supersolenoid |
| 2. | Solenoid | → | Nucleosome | → | Chromatid |
| 3. | DNA | → | Solenoid | → | Nucleosome |
| 4. | Chromatin | → | Solenoid | → | Nucleosome |
Subtopic: DNA Packaging |
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Heterochromatin
1. Is transcriptionally active
2. Is densely packed
3. Replicated during early S-phase
4. Stains lightly
1. Is transcriptionally active
2. Is densely packed
3. Replicated during early S-phase
4. Stains lightly
Subtopic: DNA Packaging |
90%
From NCERT
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The number of glycosidic bonds associated with DNA of diploid human cell are
1. \(6.6 \times 10^9\)
2. \(2 \times 6.6 \times 10^9\)
3. \(3.3 \times 10^9 \)
4. \(3.3 \times 10^9-2\)
1. \(6.6 \times 10^9\)
2. \(2 \times 6.6 \times 10^9\)
3. \(3.3 \times 10^9 \)
4. \(3.3 \times 10^9-2\)
Subtopic: DNA Double Helix |
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Which of the following does not confer stability to the helical structure of DNA?
1. Phosphodiester bond
2. H-bond
3. N-glycosidic linkage
4. Both (1) & (2)
1. Phosphodiester bond
2. H-bond
3. N-glycosidic linkage
4. Both (1) & (2)
55%
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Which of the following type of bacteria were used in Griffith's transformation experiment?
1. Diplococcus, R-lll and S-ll type
2. Pneumococcus, T2 phage
3. Streptococcus, R-ll and S-lll type
4. Diplococcus, E coli
1. Diplococcus, R-lll and S-ll type
2. Pneumococcus, T2 phage
3. Streptococcus, R-ll and S-lll type
4. Diplococcus, E coli
72%
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