Semi-conservative replication

What is meant that DNA replication follows a “semi-conservative” model?

• After DNA replication, each strand contains one side that is a parental strand and the other side is a daughter strand.
• After DNA replication, one completed strand contains only parental DNA while the other contains only daughter DNA.
• None of these identify the “semi-conservative” model.
• After DNA replication, one completed strand contains a mixture of both parental DNA and daughter DNA dispersed throughout the strand.

Which scientists determined that DNA was a double helix?

• Franklin & Watkins
• Hershey & Chase
• Meselson & Stahl
• Watson & Crick

Which scientist(s) determined that DNA replication was a semi-conservative process?

• Meselson & Stahl
• Griffith
• Hershey & Chase
• Chargaff

Thymine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be cytosine?

• 42%
• 31%
• 16%
• 8%

In an analysis of the nucleotide composition of DNA, which of the following will be found? 

• A = C 
•  A = G and C = T 
• A + C = G + T 
• G + C = T + A