DNA REPLICATION

Multiple Choice

Which of the following best describes the semi-conservative nature of DNA replication?

• Each new DNA molecule contains one original strand and one newly synthesized strand.

• Both strands of the new DNA molecule are newly synthesized.

• Each new DNA molecule contains two original strands.

• DNA replication only occurs in one direction.

Multiple Choice

Why is DNA replication considered essential for cell division and the continuity of life?

• DNA replication is essential for cell division and the continuity of life because it ensures that each new cell receives an identical copy of the genetic material.
• DNA replication is not necessary for the survival of cells.
• DNA replication is a process that happens after cell division.
• DNA replication occurs only in prokaryotic cells.

Multiple Choice

Which enzyme is responsible for sealing gaps in the DNA backbone during DNA replication?

• Helicase

• Primase

• DNA Polymerase

• Ligase

Multiple Select

Which of the following statements about the initiation step of DNA replication are correct?

• Replication begins at specific sites called origins of replication.

• Helicase unwinds the DNA helix, creating a replication fork.

• Primase synthesizes a short RNA primer complementary to the DNA template.

• DNA ligase joins Okazaki fragments during initiation.

Multiple Choice

What is the main difference between the leading and lagging strands during DNA replication?

• The leading strand is synthesized continuously, while the lagging strand is synthesized discontinuously.

• The leading strand contains Okazaki fragments, while the lagging strand does not.

• The lagging strand is synthesized in the direction of the replication fork, while the leading strand is not.

• Both strands are synthesized in the same way.

Multiple Choice

Which enzyme is responsible for joining Okazaki fragments?

• DNA ligase

• DNA polymerase

• DNA helicase

• RNA primase

Multiple Choice

During DNA replication, DNA ligase joins the Okazaki fragments to form a continuous ___ strand.

• DNA
• RNA

• TNT

• UGA

Multiple Choice

Explain what happens during the termination step of DNA replication and why it is important for the cell.

• The template strands are destroyed during termination.
• Termination leads to the replication of RNA instead of DNA.
• The termination step of DNA replication involves stopping the synthesis of new DNA strands and separating them from the template strands, ensuring accurate replication.
• DNA strands are synthesized continuously without stopping.

Multiple Choice

How does the process of DNA replication ensure genetic continuity between parent and daughter cells?

• DNA replication results in the complete loss of genetic information.
• DNA replication only occurs in the presence of specific environmental factors.
• DNA replication ensures genetic continuity by using each original strand as a template to create two identical DNA molecules.
• DNA replication randomly alters the genetic material during cell division.

Multiple Choice

What does it mean when DNA replication is described as 'semi-conservative'?

• Each new DNA molecule has one original strand and one new strand.

• Both strands of the original DNA are copied exactly as they are.

• Each new DNA molecule is completely new, with no original material.

• The DNA is only partially copied during replication.

Labelling

Label DNA replication

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Replication fork

Polymerase