DNA Replication and Central Dogma

Which of the following is NOT true regarding RNA?

• Is a single stranded molecule

• Contains guanine

• Contains a deoxyribose sugar

• Contains uracil

rRNA is known for…

• Forming part of the ribosome

• Bringing amino acids from the cytoplasm to the nucleus

• Carrying the message from DNA that will be translated into a protein

• Making a protein sequence from amino acids

This molecule carries the message that will be translated at the ribosome to form a protein.

• tRNA

• rRNA

• mRNA

• DNA

This molecule is double stranded and contains deoxyribose.

• mRNA

• DNA

• tRNA

• rRNA

A scientist looks under a high-powered microscope to observe cells undergoing DNA replication. The scientist notices that the DNA strand cannot split apart (unzip) for replication to begin. Which enzyme is likely defective (messed up) in this scenario?

• DNA Polymerase

• RNA Polymerase

• Ligase

• Helicase

For DNA replication, which of the following has the enzymes correctly ordered in the sequence in which they act in DNA replication?

• Primase, DNA Polymerase, Ligase, Helicase

• Helicase, Primase, DNA Polymerase, Ligase

• DNA Polymerase, Helicase, Primase, Ligase

• Ligase, Helicase, DNA Polymerase, Primase

Which molecule joins nucleotides/connects bases that complement the original DNA strand?

• DNA Polymerase

• Primase

• Helicase

• Ligase

This enzyme "glues together" Okazaki fragments in the lagging strand and in places where RNA primers have been removed.

• DNA Polymerase

• Primase

• Helicase

• Ligase

Which of the following is NOT found in RNA?

• Adenine

• Cytosine

• Guanine

• Thymine

Which of the following is NOT a key difference between DNA and RNA?

• Both being made of amino acids

• Whether the strand uses uracil

• Type of sugar that makes up their nucleotides

• Strand structure differences: double vs. single