DNA Replication Quiz

What is the primary purpose of DNA replication?

• To synthesize proteins directly.

• To copy genetic information and create a new DNA strand.

• To mutate genetic codes for evolution.

• To produce mRNA for protein synthesis.

Which enzyme is responsible for unzipping the DNA strands during replication?

• DNA ligase

• RNA polymerase

• DNA helicase

• DNA polymerase

What are the complementary base pairs in DNA?

• A-T, G-C

• A-G, C-T

• A-C, T-G

• A-U, C-G

What is the role of DNA polymerase in replication?

• Seals the DNA fragments.

• Unwinds the double helix.

• Proofreads and adds nucleotides.

• Synthesizes RNA primers.

What makes DNA replication "semi-conservative"?

• Each new DNA molecule contains one old strand and one new strand.

• Only half of the DNA is replicated.

• The process requires minimal energy.

• It uses a conservative amount of nucleotides.

Which type of RNA carries genetic information from DNA to ribosomes?

• tRNA

• rRNA

• mRNA

• dRNA

What does tRNA do during protein synthesis?

• Carries the genetic code to the ribosome.

• Carries amino acids to the ribosome.

• Synthesizes RNA primers.

• Forms part of the ribosome structure.

What is the role of rRNA in the cell?

• Acts as a template for protein synthesis.

• Carries amino acids to the ribosome.

• Forms the core of ribosomes and facilitates translation.

• Repairs DNA strands.

What could result from an error in DNA replication?

• Faster cell division.

• Mutations that may lead to diseases and disorders.

• Increased protein production.

• Improved DNA stability.

Why is RNA needed in protein synthesis instead of DNA?

• RNA is more stable than DNA.

• DNA needs to be protected and cannot leave the nucleus, so RNA acts as a messenger.

• RNA is the genetic material of the cell.

• DNA is too large to synthesize proteins.