Exam 3 Review

In the Watson-Crick model, where is the sugar-phosphate backbone located?

• Inside, facing bases

• Outside, facing away from bases

• Alternating sides

• Only on the 5’ end

Which enzyme synthesizes the majority of the DNA strand in prokaryotes?

• DNA Pol I

• DNA Pol III

• Helicase

• Ligase

Eukaryotes have a single origin of replication.

• True

• False

Okazaki fragments are found on the:

• Leading strand

• Lagging strand

• Both strands

• Neither

Which bond connects nucleotides in a DNA strand?

• Hydrogen bond

• Peptide bond

• Phosphodiester bond

• Ionic bond

Telomerase is important for:

• Unwinding DNA

• Extending chromosome ends

• Proofreading DNA

• Splicing introns

Which RNA polymerase transcribes protein-coding genes in eukaryotes?

• RNA Pol I

• RNA Pol II

• RNA Pol III

• RNA Pol IV

The TATA box is part of the:

• Terminator

• Promoter

• Coding strand

• Spliceosome

Introns are removed during mRNA processing.

• True

• False

Which modification is added to the 5’ end of eukaryotic mRNA?

• Poly-A tail

• 5’ cap

• Intron loop

• Start codon