DNA Structure
DNA Replication
Scientists and Discoveries
Enzymes and Functions
100

Cytosine and Thymine are classified as what type of molecule?

What are pyrimidines?

100

DNA replication is described as what type of process?

What is semi-conservative?

100

Which scientists discovered the double-helix structure of DNA?

Who are Watson and Crick?

100

Which enzyme unwinds the DNA strands before replication begins?

What is DNA helicase?

200

The two strands of a DNA double helix are described as what?

What are complementary?

200

After DNA replication, the two resulting DNA molecules are what?

What are identical?

200

Which scientists produced X-ray patterns showing DNA fibers to be twisted?

Who are Wilkins and Franklin?

200

What is the role of DNA polymerase?

What is to add complementary nucleotides to the growing DNA strand?

300

The outer portion of the DNA molecule is called what?

What is the sugar-phosphate backbone?

300

The synthesis of a new strand of DNA begins with the breaking of what bonds?

What are hydrogen bonds?

300

If a DNA molecule contains 30% adenine, how much cytosine does it contain?

What is 20%?

300

Which molecule is NOT involved in ribosome function?

What is DNA?

400

DNA nitrogen bases bond together using which type of bond?

What are hydrogen bonds?

400

What enzyme unzips the DNA strands during replication?

What is DNA helicase?

400

Which rule explains the 1:1 ratio of complementary nitrogen bases in DNA?

What is Chargaff's Rule?

400

What enzyme joins fragments of DNA together during replication?

What is DNA ligase?

500

Chargaff's Rule states there is a 1:1 ratio between which bases?

What are adenine and thymine, and cytosine and guanine?

500

What enzyme adds complementary nucleotides to the growing DNA strand?

What is DNA polymerase?

500

Which scientist worked to determine the role of base pairing in DNA replication?

Who is Chargaff?

500

Which enzyme synthesizes RNA primers needed for DNA replication?

What is primase?

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