Insertion or deletion of how many bases will not cause a frameshift mutation?

1.12.2
3.4.Any number

Subtopic:  Mutations and Genetic Code |
 76%
From NCERT
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What defines a coding and a template strand in the transcription unit?

1. Structural gene 2. Ori
3. Terminator 4. Promoter
Subtopic:  Transcription: I |
 68%
From NCERT
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The DNA dependent polymerases catalyze:

1. Only in 3’ – 5’ direction
2. Only in 5’ – 3’ direction
3. In both directions
4. In neither directions

Subtopic:  DNA Replication: I |
 84%
From NCERT
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DNA is structurally and chemically more stable than RNA because of the following except:

1. It has thymine instead of uracil
2. 2’ –OH is absent in DNA
3. It replicates itself based on complementary base pairing
4. It does not have any catalytic role

Subtopic:  DNA vs RNA as Genetic Material |
 54%
From NCERT
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Who proposed a semi-conservative mode of replication for DNA?

1.Watson and Crick2.Meselson and Stahl
3.Hershey and Chase4.Beadle and Tatum

Subtopic:  DNA vs RNA as Genetic Material |
 62%
From NCERT
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A transcription unit does not contain:

1. Promoter 2. Operator
3. Structural gene 4. Terminator

Subtopic:  Transcription: I |
 87%
From NCERT
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DNA was first identified by:

1.Friedrich Meischer2.Phoebus Levene
3.Linus Pauling4.Erwin Chargaff

Subtopic:  DNA Double Helix |
 93%
From NCERT
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The discontinuously synthesized DNA fragments are later joined by:

1. DNA helicase 2. Topoisomerase
3. DNA ligase 4. DNA polymerase

Subtopic:  DNA Replication |
 94%
From NCERT
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Which of the following RNAs plays both structural and catalytic roles?

1. mRNA 2. tRNA
3. rRNA 4. miRNA
Subtopic:  Transcription: I |
 75%
From NCERT
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If E.coli was allowed to grow for 80 minutes after transfer from 15N to 14N medium, the number of hybrid density DNA molecules would be:

1.22.16
3.144.8

Subtopic:  DNA Replication |
 61%
From NCERT
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