A short video entitled Building a Model of DNA Replication demonstrating the activity above can be viewed at:
https://youtu.be/SAXHwkKe6Bc
After watching the video, answer the following questions:
1. Which of the following statements about the use of gumdrops and marshmallows in this activity is true?
A. Both are used to represent nucleotides.
B. Gumdrops represent nitrogen and marshmallows represent phosphorus.
C. Gumdrops represent DNA and marshmallows represent RNA.
D. Gumdrops represent nucleotides and marshmallows represent phosphodiester bonds.
2. In this activity, DNA molecules containing only original template DNA are represented using:
A. gumdrops and toothpicks only.
B. marshmallows and toothpicks only.
C. gumdrops and marshmallows only.
D. toothpicks only.
3. After one round of replication, what has been produced by the conservative model of replication?
A. One molecule that contains 0% gumdrops and 100% marshmallows, and one molecule that contains 100°,6 gumdrops and 0% marshmallows.
B. Two molecules that contain 100% marshmallows and 0% gumdrops.
C.Two molecules that both contain 100% gumdrops and 0% marshmallows.
D.Two molecules that both contain 50% gumdrops and 50% marshmallows.
4. After two rounds of replication, which of the following is true of the four DNA molecules produced by the semi-conservative model?
A.All four contain 25% gumdrops and 75% marshmallows.
B. All four contain 50% gumdrops and 50% marshmallows.
C. Two contain 50% gumdrops and 50% marshmallows, and two contain 0% gumdrops and 100% marshmallows.
D. Two contain 100% gumdrops and 0% marshmallows, and two contain 0% gumdrops and 100% marshmallows.
5. Which model(s) of DNA replication never produce(s) a DNA molecule that contains both gumdrops and marshmallows?
A. The conservative model only.
B. The dispersive model only.
C. Both the conservative model and the dispersive model.
D. Both the dispersive and the semi-conservative model.