Gene Expression and Regulation Review

Nucleotide pairing is always

• purine and purine
• pyrimidine and pyrimidine
• purine and pyrimidine
• none of the above-pairing is random

DNA is replicated using the _______________ model

• conservative
• dispersive
• semiconservative

Tags

NGSS.HS-LS3-2

Enzyme that unwinds the DNA

• ligase
• DNA Polymerase
• primase
• helicase

Seals the Okazaki fragments together

• DNA Polymerase
• ligase
• helicase
• primase

Adds nucleotides to the newly synthesized strand of DNA

• DNA polymerase I
• DNA polymerase III
• Primase
• Ligase

synthesizes a short fragment of RNA that allows DNA polymerase III to bind

• ligase
• DNA polymerase I
• primase
• helicase

removes the RNA primer and adds DNA nucleotides to fill in the gap

• DNA polymerase III
• ligase
• primase
• DNA polymerase I

direction new nucleotides are synthesized on the new strand

• 5^' to 3' (new nucleotides added to the 3' end)
• 3' to 5' (new nucleotides added to the 5' end)

repetitive sequences of DNA on the ends of chromosomes (TTAGGG)

• telomeres
• telomerase
• Okazaki fragments
• primer

Based on Chargaff’s rule, the percentage of cytosine in the DNA of the bacterium, S. lutea in the table, should be approximately what?

• 26.6%.
• 73.2%.
• 36.6%.
• 29.4%.