DNA Replication

What is the role of ligase in DNA replication?

• Ligase is the enzyme that joins Okazaki fragments together to form a continuous DNA strand.

• Ligase is responsible for unwinding the DNA double helix.

• Ligase synthesizes new DNA strands from nucleotides.

• Ligase repairs damaged DNA by removing incorrect bases.

What is DNA replication?

• DNA replication is the process by which a cell makes an exact copy of its DNA, resulting in two identical DNA molecules.

• DNA replication is the process of breaking down DNA into smaller fragments for analysis.

• DNA replication is the method by which RNA is synthesized from a DNA template.

• DNA replication is the process of repairing damaged DNA strands.

What is the end result of DNA replication?

• Two identical DNA molecules, each containing one original strand and one new strand.

• One single DNA molecule with two strands.

• Two different DNA molecules, each with unique sequences.

• A mixture of old and new DNA strands in a single molecule.

What is a template strand in DNA replication?

• A strand that is synthesized during DNA replication.

• The original strand of DNA that serves as a guide for the synthesis of a new complementary strand.

• A strand that is formed as a result of mutations.

• A strand that is used for RNA synthesis.

What are the four nitrogen bases in DNA?

• Adenine (A), Thymine (T), Cytosine (C), Guanine (G)

• Adenine (A), Uracil (U), Cytosine (C), Guanine (G)

• Adenine (A), Thymine (T), Cytosine (C), Uracil (U)

• Guanine (G), Thymine (T), Cytosine (C), Adenine (A)

What base pairs with adenine in DNA?

• Cytosine (C)

• Guanine (G)

• Thymine (T)

• Uracil (U)

What is the lagging strand in DNA replication?

• The DNA strand that is synthesized continuously in the same direction as the replication fork.

• The DNA strand that is synthesized discontinuously in short segments, opposite to the direction of the replication fork.

• The DNA strand that is not involved in replication.

• The DNA strand that is synthesized in a single continuous piece.

What base pairs with cytosine in DNA?

• Adenine (A)

• Thymine (T)

• Guanine (G)

• Uracil (U)

What is the role of helicase in DNA replication?

• Helicase is the enzyme that unwinds and separates the two strands of DNA, allowing replication to occur.

• Helicase is responsible for synthesizing new DNA strands during replication.

• Helicase repairs damaged DNA strands after replication.

• Helicase is involved in the packaging of DNA into chromatin.

How do mutations occur during DNA replication?

• Mutations occur due to errors in base pairing or improper repair of damaged DNA during replication.

• Mutations are caused by the introduction of foreign DNA into the genome.

• Mutations happen only when DNA is exposed to radiation or chemicals.

• Mutations are always beneficial and lead to evolutionary advantages.