Honors DNA/RNA Protein Synthesis Review

At what point in the cell cycle does DNA replication occur and why?

• before a cell divides, to provide each of the two resulting cells with a complete set of DNA instructions
• before a cell divides, to ensure that the DNA will fit into the resulting cells
• during cell division, to ensure that the DNA will fit into the resulting cells
• after a cell divides, to provide each of the two resulting cells with a complete set of DNA instructions 

Which choice describes DNA after replication has taken place?

• one molecule with two original strands and one molecule with two new strands
• two molecules, each with one original and one new strand
• two molecules, each with two new strands
•  two molecules, each with two old strands

Scientists given credit for the structure of DNA

• Watson, Rosalind and Avery

• Chargaff and Crick

• Watson and Crick and Wilkins

• Wilkins and Watson

Which enzyme has the job of unzipping the double helix?

• Helicase
• Polymerase
• Ligase
• Primerase

If a strand reads:
3' A A A T T T C 5'
The matching strand would read...

• 5' T T T A A A G 3'
• 3' T T T A A A G 5'
• 5' A A A T T T C 3'
• 3' U U U A A A G 5'

What are the gaps between the newly synthesized DNA on the lagging strand called?

• Okazaki fragments
• Polymer gaps
• Helicase fragments
• Acidic gaps

This picture is illustrating the ____ nature of DNA.

• anti-parallel
• deoxyribosic
• helical
• radioactive

Polymerase is able to replicate the new DNA ______ along the leading strand.

• continuously
• only in short fragments
• very slowly
• prokaryotically

Which enzyme is responsible for adding nucleotides?

• Topoisomerase
• DNA Polymerase
• Ligase
• Primase

The process of DNA replication is called semi conservative because it results in

• none of these
• Two DNA molecules.  One original molecule and one with two new strands
• two exact copies with new strands
• two identical molecules, each with 1 original strand and one new.