Class XII · Biology practice

Molecular Basis of Inheritance MCQs

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668 questions in this collection · Page 41 of 67

Question 401 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

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

Molecular Basis Of Inheritance

DNA ligase joins DNA fragments by forming a _______ bond.

Ligase forms phosphodiester bonds.

Question 403 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

_______ relieves the tension created by unwinding of DNA.

Topoisomerase (Gyrase) relieves supercoiling tension.

Question 404 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

In prokaryotes, there is _______ origin of replication.

Prokaryotes typically have a single origin (ori).

Question 405 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

In eukaryotes, there are _______ origins of replication.

Eukaryotes have multiple origins to speed up replication.

Question 406 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The DNA dependent RNA polymerase catalyzes polymerization in _______ direction.

RNA synthesis is also 5' to 3'.

Question 407 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The template strand has _______ polarity.

The template is read 3' to 5'.

Question 408 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

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

Molecular Basis Of Inheritance

In eukaryotes, the genes are _______ (interrupted).

Eukaryotic genes are split by introns.

Question 410 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The RNA polymerase I transcribes _______ RNA.

Pol I makes rRNA.

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