Class XII · Biology practice

Molecular Basis of Inheritance MCQs

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668 questions in this collection · Page 30 of 67

Question 291 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

DNA polymerase catalyzes polymerization only in one direction, that is _______

Polymerization always occurs in the 5' to 3' direction.

Question 292 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

On the _______ strand, the replication is continuous.

The leading strand is synthesized continuously 5' to 3'.

Question 293 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

On the lagging strand, replication is _______

The lagging strand is synthesized in short fragments (discontinuous).

Question 294 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The discontinuously synthesized fragments are joined by the enzyme _______

DNA ligase joins Okazaki fragments.

Question 295 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The DNA polymerases on their own cannot initiate the process of replication, they need a _______

Replication requires an RNA primer to start.

Question 296 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

Replication of DNA occurs at the _______ phase of the cell cycle.

DNA replication occurs during the Synthesis (S) phase.

Question 297 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

A failure in cell division after DNA replication results in _______

Whole sets of chromosomes increase, causing polyploidy.

Question 298 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

The process of copying genetic information from one strand of the DNA into RNA is termed _______

Transcription is creating RNA from a DNA template.

Question 299 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

In transcription, Adenine pairs with _______ instead of Thymine.

In RNA, Uracil pairs with Adenine.

Question 300 of 668

📘 CLASS XII

Molecular Basis Of Inheritance

A transcription unit in DNA is defined primarily by three regions: A Promoter, The Structural gene, and A _______

The three parts are Promoter, Structural Gene, and Terminator.

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