Class XII · Biology practice

Molecular Basis of Inheritance MCQs

Check your understanding, bookmark questions and revisit your mistakes.

Page score: 0/40
Choose an answer to begin.

Practice scoring: +4 correct, 0 incorrect. Filters apply to this page. Use timed tests for negative marking.

Answers and bookmarks are saved in this browser, across visits. They do not sync to your account.

668 questions in this collection · Page 40 of 67

Question 391 of 668
📘 CLASS XII

Molecular Basis Of Inheritance

Termination of translation occurs when a _______ codon reaches the A site.
Stop codons signal termination.
Question 392 of 668
📘 CLASS XII

Molecular Basis Of Inheritance

The human genome has approximately _______ billion base pairs.
Approximately 3 billion (3.3 x 10^9).
Question 393 of 668
📘 CLASS XII

Molecular Basis Of Inheritance

Sickle cell anemia is caused by a _______ mutation.
It is a point mutation (substitution).
Question 394 of 668
📘 CLASS XII

Molecular Basis Of Inheritance

Taylor used Vicia faba to prove that DNA replication is _______
Taylor proved semi-conservative replication in eukaryotes.
Question 395 of 668
📘 CLASS XII

Molecular Basis Of Inheritance

DNA replication is _______ and semi-discontinuous.
It is semi-conservative.
Question 396 of 668
📘 CLASS XII

Molecular Basis Of Inheritance

The enzyme _______ separates the two strands of DNA during replication.
Helicase unwinds the DNA.
Question 397 of 668
📘 CLASS XII

Molecular Basis Of Inheritance

To prevent re-annealing of separated DNA strands, _______ proteins bind to them.
Single Stranded Binding proteins stabilize the strands.
Question 398 of 668
📘 CLASS XII

Molecular Basis Of Inheritance

_______ is the enzyme that synthesizes RNA primer.
Primase synthesizes the RNA primer.
Question 399 of 668
📘 CLASS XII

Molecular Basis Of Inheritance

DNA polymerase adds nucleotides to the _______ end of the growing chain.
Nucleotides are added to the 3' OH end.
Question 400 of 668
📘 CLASS XII

Molecular Basis Of Inheritance

Okazaki fragments are formed on the _______ strand.
Okazaki fragments form on the lagging strand.
Page score: 0/40