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 |
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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)
Subtopic: DNA Double Helix |
60%
From NCERT
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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
Subtopic: Search for Genetic Material |
75%
From NCERT
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The biochemical nature of transforming principle was defined by
1. Griffith
2. Avery, Macleod, McCarty
3. Watson and Crick
4. Taylor
1. Griffith
2. Avery, Macleod, McCarty
3. Watson and Crick
4. Taylor
Subtopic: Search for Genetic Material:I |
72%
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In Hershey and Chase experiment, the protein of T2 phage was radioactive by using:
1. S32
2. P31
3. S35
4. P32
1. S32
2. P31
3. S35
4. P32
Subtopic: Search for Genetic Material |
63%
From NCERT
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Choose the correct option w.r.t. RNA:
1. Presence of thymine in place of uracil
2. Absence of free 2'OH in sugar
3. Mutates at faster rate
4. Is non-catalytic
1. Presence of thymine in place of uracil
2. Absence of free 2'OH in sugar
3. Mutates at faster rate
4. Is non-catalytic
Subtopic: DNA vs RNA as Genetic Material |
77%
From NCERT
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Semiconservative DNA replication was proved by Messelson and Stahl, in which DNA was made :
1. Radioactive using \(\mathrm{N}^{15}\)
2. Heavy using\(\mathrm{N}^{14}\)
3. Heavy using \({ }^{15} \mathrm{NH}_4 \mathrm{Cl}\)
4. Radioactive using \({ }^{14} \mathrm{NH}_4 \mathrm{Cl}\)
1. Radioactive using \(\mathrm{N}^{15}\)
2. Heavy using\(\mathrm{N}^{14}\)
3. Heavy using \({ }^{15} \mathrm{NH}_4 \mathrm{Cl}\)
4. Radioactive using \({ }^{14} \mathrm{NH}_4 \mathrm{Cl}\)
Subtopic: Search for Genetic Material |
75%
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During DNA replication, strand separation by breaking the H-bonds is performed by:
1. DNA ligase
2. DNA polymerase
3. Helicase
4. RNA primase
1. DNA ligase
2. DNA polymerase
3. Helicase
4. RNA primase
Subtopic: The DNA |
69%
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