What facilitates the opening of the helix during elongation step of transcription?

(1) RNA polymerase

(2) Helicase

(3) Topoisomerase

(4) Gyrase

Subtopic:  Transcription: III | Transcription |
 57%
From NCERT
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Which of the following helps in termination of transcription?

(1) Sigma factor

(2) Translocase

(3) Ubiquitin

(4) Rho factor

Subtopic:  Transcription: III | Transcription |
 93%
From NCERT
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Transcription and translation can be coupled in:

(1) Bacteria

(2) Yeast

(3) Plants

(4) Animals

Subtopic:  Translation |
 90%
From NCERT
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In eukaryotes RNA polymerase II transcribes:

(1) mRNA

(2) rRNA

(3) tRNA

(4) hnRNA

Subtopic:  Transcription: IV | Transcription |
 72%
From NCERT
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What is added to the 5’ end of hnRNA in Eukryotes?

1. Poly A tail

2. Methyl cytosine triphosphate

3. Methyl guanosine triphosphate

4. Poly U tail

Subtopic:  Transcription: IV | Transcription |
 85%
From NCERT
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Some amino acids are coded by more than one codon. Hence genetic code is:

(1) Unambiguous

(2) Non specific

(3) Degenerate

(4) Universal

Subtopic:  Genetic Code: III | Genetic Code |
 80%
From NCERT
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In actual structure, tRNA is a compact molecule which looks like a/an:

(1) Clover leaf

(2) Rail road

(3) Inverted L

(4) Alpha helix

Subtopic:  Translation |
 73%
From NCERT
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Which of the following anticodons will hybridize with the mRNA codon 5’ – AUG – 3’?

1. 5’ – UAC – 3’

2. 5’ – TAC – 3’

3. 3’ – UAC – 5’

4. 3’ – TAC – 5’

Subtopic:  Translation Mechanism |
 69%
From NCERT
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Which of the following acts as a ribozyme for peptide bond formation in bacteria?

(1) 5s rRNA

(2) 23s rRNA

(3) 16s rRNA

(4) 5.1s rRNA

Subtopic:  Translation |
 86%
From NCERT
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The UTR [untranslated regions] in an mRNA:

(1) Are present only at 5’ end and are not required for efficient translation

(2) Are present only at 3’ end and are not required for efficient translation

(3) Are present at both 5’ and 3’ ends and are not required for efficient translation

(4) Are present at both 5’ and 3’ ends and are required for efficient translation process

Subtopic:  Translation Mechanism |
 85%
From NCERT
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