🧫
Molecular Basis of Inheritance MCQs
Class XII Biology
•
NCERT Based
•
NEET Practice
📘 Concept Based
📝 Exam Level
🤖 AI Explanations
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668 questions in this chapter
Question 311 of 668
📘 CLASS XII
RNA polymerase binds to the promoter and initiates transcription, a process called _______
Binding to the promoter starts initiation.
Question 312 of 668
📘 CLASS XII
RNA polymerase uses nucleoside _______ as substrate.
NTPs (Triphosphates) are the substrates and energy source.
Question 313 of 668
📘 CLASS XII
RNA polymerase associates transiently with _______ factor to initiate transcription.
The sigma factor is required for initiation specificity.
Question 314 of 668
📘 CLASS XII
RNA polymerase associates with _______ factor to terminate transcription.
The rho factor helps terminate transcription.
Question 315 of 668
📘 CLASS XII
In eukaryotes, RNA polymerase I transcribes _______
Pol I transcribes rRNAs (28S, 18S, 5.8S).
Question 316 of 668
📘 CLASS XII
In eukaryotes, RNA polymerase III transcribes _______
Pol III transcribes tRNA, 5S rRNA, and snRNAs.
Question 317 of 668
📘 CLASS XII
RNA polymerase II transcribes precursor of mRNA called _______
Pol II makes heterogeneous nuclear RNA (hnRNA).
Question 318 of 668
📘 CLASS XII
The process of removing introns and joining exons is called _______
Splicing removes introns.
Question 319 of 668
📘 CLASS XII
In capping, an unusual nucleotide, methyl _______ triphosphate, is added to the 5' end.
A 7-methylguanosine cap is added.
Question 320 of 668
📘 CLASS XII
In tailing, adenylate residues are added at the _______ end in a template independent manner.
A Poly-A tail is added to the 3' end.
