BIOL211 Unit 2 Review Game

Which of the following elements could you radiolabel to mark DNA and not protein?

• N

• S

• P

• O

After the 1st round of replication in the Meselson-Stahl experiment, what % of the DNA was a hybrid of N¹⁴ and N¹⁵?

• 0%

• 25%

• 50%

• 100%

Which of these are ONLY found in eukaryotic transcription?

• Promoter

• 5' cap

• Enhancer sequences far from the transcription start site

• Mediator complex

• Sigma Factor

What is heterochromatin?

• Tightly packed, transcriptionally active DNA

• Tightly packed, transcriptionally inactive DNA

• Loosely packed, transcriptionally active DNA

• Loosely packed, transcriptionally inactive DNA

DNA methylation promotes...

• Gene activation

• Gene repression

Which methods of gene regulation below are ONLY in eukaryotes and not found in prokaryotes?

• chromatin remodeling

• miRNAs

• post-translation modifications

• repressor proteins

Which protein relieves tension ahead of the replication fork during DNA replication?

• helicase

• ligase

• topoisomerase

• primase

Which DNA repair mechanism is used to repair damage caused by UV light?

• mismatch repair

• non-homologous end joining

• nucleotide excision repair

• DNA polymerase proofreading

What is the function of the polyA tail added to mRNA in eukaryotes?

• prevent translation from occuring

• prevent degradation of the transcript

• initiate binding of the ribosome to the mRNA

• adding a signal sequence to the polypeptide

The ribosome has three binding sites for tRNAs. Which is the first site that an incoming tRNA binds to?

• E

• P

• A