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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 401 of 668
📘 CLASS XII
The lagging strand is synthesized in the direction _______
All DNA synthesis occurs 5' to 3', even on the lagging strand (away from fork).
Question 402 of 668
📘 CLASS XII
DNA ligase joins DNA fragments by forming a _______ bond.
Ligase forms phosphodiester bonds.
Question 403 of 668
📘 CLASS XII
_______ relieves the tension created by unwinding of DNA.
Topoisomerase (Gyrase) relieves supercoiling tension.
Question 404 of 668
📘 CLASS XII
In prokaryotes, there is _______ origin of replication.
Prokaryotes typically have a single origin (ori).
Question 405 of 668
📘 CLASS XII
In eukaryotes, there are _______ origins of replication.
Eukaryotes have multiple origins to speed up replication.
Question 406 of 668
📘 CLASS XII
The DNA dependent RNA polymerase catalyzes polymerization in _______ direction.
RNA synthesis is also 5' to 3'.
Question 407 of 668
📘 CLASS XII
The template strand has _______ polarity.
The template is read 3' to 5'.
Question 408 of 668
📘 CLASS XII
A gene is a segment of DNA that codes for _______
A gene codes for functional RNA (tRNA, rRNA) or protein (via mRNA).
Question 409 of 668
📘 CLASS XII
In eukaryotes, the genes are _______ (interrupted).
Eukaryotic genes are split by introns.
Question 410 of 668
📘 CLASS XII
The RNA polymerase I transcribes _______ RNA.
Pol I makes rRNA.
