DNA Replication and Protein Synthesis Review

Which of the following enzymes is responsible for synthesizing the new DNA strand?

• DNA polymerase

• Helicase

• Primase

• DNA ligase

What is the difference between leading and lagging strands?

• DNA is synthesized in a 5' to 3' direction on the lagging strand and a 3' to 5' direction on the leading strand

• DNA is synthesized in a 3' to 5' direction on the lagging strand and a 5' to 3' direction on the leading strand

• DNA is synthesized continuously on the leading strand and discontinuously on the lagging strand

• DNA is synthesized discontinuously on the leading strand and continuously on the lagging strand

Which of the following enzymes is responsible for joining the Okazaki fragments?

• DNA polymerase

• Helicase

• Primase

• DNA ligase

Which of the following explains the base pairing rules?

• G pairs with T with 3 hydrogen bonds and A pairs with C with 2 hydrogen bonds

• G pairs with T with 2 hydrogen bonds and A pairs with C with 3 hydrogen bonds

• A pairs with T with 2 hydrogen bonds and G pairs with C with 3 hydrogen bonds

• A pairs with T with 3 hydrogen bonds and G pairs with C with 2 hydrogen bonds

Which of the following enzymes is responsible for breaking the hydrogen bonds between nucleotides?

• DNA polymerase

• Helicase

• Primase

• DNA ligase

Which of the following describes the 5' end?

• phosphate attached to the pentose sugar

• hydroxyl attached to the pentose sugar

• nitrogenous base attached to the pentose sugar

• the next nucleotide attached to the pentose sugar

Which of the following describes why there is a leading and lagging strand in DNA replication?

• DNA is antiparallel

• DNA is negatively charged

• DNA has a phosphate group

• DNA has hydrogen bonds

Which of the following is the enzyme used in the process of transcription?

• DNA polymerase

• RNA polymerase

• primase

• helicase

Which of the following describes the process of alternative RNA splicing?

• Different mRNA molecules are made from different sections of DNA

• Different mRNA molecules are made from cutting out different exons from same pre-mRNA

• Different mRNA molecules are absorbed from the environment for recombination

• Different mRNA molecules are absorbed from the mitochondria for translation

Which of the following is the function of the poly-A tail?

• To protect mRNA from hydrolytic enzymes

• To allow for exit from nucleus

• To signal for termination of translation

• To decrease the length of mRNA molecules