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Q. No.In Hershey and Chase experiment, the protein of T2 phage was radioactive by using
1. S32
2. P31
3. S35
4. P32
57%
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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
72%
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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 \({ }^{14} \mathrm{NH}_4 \mathrm{Cl}\)
69%
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During DNA replication, strand separation by breaking the H-bonds is performed by
1. DNA ligase
2. DNA polymerase
3. Helicases
4. RNA primase
1. DNA ligase
2. DNA polymerase
3. Helicases
4. RNA primase
71%
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Which of the following acts as substrate as well as provide energy for DNA polymerisation?
1. Ribonucleoside
2. Deoxyribonucleoside
3. Ribonucleotide
4. Deoxyribonucleoside triphosphate
1. Ribonucleoside
2. Deoxyribonucleoside
3. Ribonucleotide
4. Deoxyribonucleoside triphosphate
73%
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DNA replication is
1. Semi-conservative, continuous, unidirectional
2. Conservative, continuous
3. Semi-conservation, semi-discontinuous
4. Semi-continuous, conservative
1. Semi-conservative, continuous, unidirectional
2. Conservative, continuous
3. Semi-conservation, semi-discontinuous
4. Semi-continuous, conservative
Subtopic: DNA Replication |
87%
From NCERT
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Which of the following is a genetic RNA?
1. mRNA
2. rRNA
3. hn-RNA
4. RAN present in plant viruses
1. mRNA
2. rRNA
3. hn-RNA
4. RAN present in plant viruses
Subtopic: Transcription |
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The mRNA of prokaryotes is
1. Polycistronic
2. Momocistronic
3. Formed by splicing of hnRNA
4. Carries genetic message to DNA
1. Polycistronic
2. Momocistronic
3. Formed by splicing of hnRNA
4. Carries genetic message to DNA
Subtopic: Transcription |
84%
From NCERT
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Capping in hnRNA is catalysed by
1. Poly A polymerase
2. SnRNA
3. Guanylyl transferase
4. catalytic RNA
1. Poly A polymerase
2. SnRNA
3. Guanylyl transferase
4. catalytic RNA
Subtopic: Transcription |
67%
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Which of the following types of ribosomal RNA is not present in eukaryotic cytoplasm?
1. 18S
2. 28S
3. 5.8S
4. 16S
1. 18S
2. 28S
3. 5.8S
4. 16S
Subtopic: Transcription |
77%
From NCERT
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