Which of the following statements regarding the structure of DNA is true?

• DNA is a left-handed double helix.

• The two strands of DNA run parallel to each other.

• The sugar in DNA is ribose.

• The nitrogenous bases pair through hydrogen bonds.

What are the monomers of an RNA strand?

• Nucleosides

• Amino acids

• Nucleotides

• Carbon

Which of the following is a distinguishing feature of RNA compared to DNA?

• RNA lacks phosphate groups.

• RNA contains thymine instead of uracil.

• RNA is typically single-stranded.

• RNA is more stable than DNA under physiological conditions.

Which type of RNA is responsible for catalyzing peptide bond formation during translation?

• mRNA

• rRNA

• tRNA

• snRNA

Which enzyme is responsible for unwinding the DNA double helix during replication?

• DNA polymerase

• Helicase

• Ligase

• Topoisomerase

Which enzyme is responsible for sealing nicks between Okazaki fragments on the lagging strand?

• DNA polymerase I

• Helicase

• DNA ligase

• Primase

Which enzyme is responsible for synthesizing RNA from a DNA template?

• RNA polymerase

• DNA Polymerase

• Reverse transcriptase

• Ligase

Which of the following best describes the role of the ribosome in translation?

• It synthesizes mRNA from a DNA template.

• It forms peptide bonds and facilitates the movement of tRNA.

• It transports amino acids to the growing peptide chain.

• It modifies proteins after translation.