What is the function of helicase during DNA replication?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $9.99Unlock all

Prepare for the MTTC Integrated Science Test with comprehensive flashcards and multiple choice questions. Each question includes hints and explanations to enhance your learning experience. Equip yourself with the knowledge you need to succeed!

Multiple Choice

What is the function of helicase during DNA replication?

Explanation:
Opening idea: DNA replication requires opening the double helix so each strand can serve as a template. Helicase does this by breaking the hydrogen bonds between base pairs, using energy from ATP to unwind the DNA and form the replication fork. This unwinding exposes single-stranded templates for DNA polymerases to copy. Stopping or stabilizing the single strands is done by protective proteins, not helicase. The actual synthesis of a new strand is carried out by DNA polymerase, and sealing any backbone breaks is done by DNA ligase.

Opening idea: DNA replication requires opening the double helix so each strand can serve as a template. Helicase does this by breaking the hydrogen bonds between base pairs, using energy from ATP to unwind the DNA and form the replication fork. This unwinding exposes single-stranded templates for DNA polymerases to copy. Stopping or stabilizing the single strands is done by protective proteins, not helicase. The actual synthesis of a new strand is carried out by DNA polymerase, and sealing any backbone breaks is done by DNA ligase.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy