2. Guanine and Adenine are both:
choose onePyrimidinesPurinesSugars

3. the sides of the ladder analogy model are made up of:
choose onerepeating units of sugarsrepeating units of phosphatesrepeating units of sugars and phosphates

4. Using the ladder analogy model the sides of the ladder would be:
choose onethe rungs of the ladderthe inner most part of the ladderthe outer most part of the ladder

5. The DNA molecule is made up of:
choose oneless than 10 different types of moleuclar subunits100's of different types of molecular subunits100 000's of different types of molecular subunits

6. Using the symbols for the nitrogen base Adenine [A] the correct pair would be:
choose oneA - tA - GA - c

7. The number of different elements necessary for life is:
choose oneless than 10 different elements100's of different elements100 000's of different elements

8. Which of the following has an incorrect nitrogen base pair:
choose oneA - t, c - t, t - A, G - cc - g, g - c, t - At - A, A - t, c - G

9. Using the ladder analogy model the sides of the ladder would be:
choose onethe rungs of the ladderthe inner most part of the ladderthe outer most part of the ladder

10. A sugar is made up of:
choose onea five membered ringa six membered ringa five and a six membered ring

11. The ladder analogy results from:
choose onewinding the DNA moleucleunwinding the DNA moleculeseperating the DNA molecule into nucelotide units

12. In a DNA molecule there are:
choose onetwo different kinds of nucleotidesfour different kinds of nucleotidesbillions of different kinds of nucleotides

13. The number of different nucleotides is:
choose one100 000 or more100 or more10 or less

14. A phosphate molecular subunit is mainly made up of:
choose onePhosphorusOxygenCarbon

15. The rungs of the ladder analogy model are made up of:
choose onerepeating units of purinesrepeataing units of pyrimidinesrepeaating units of purines and pyrimidines

16. A sugar is made up of:
choose onea five membered ringa six membered ringa five and a six membered ring

17. If one purine and one pyrimidine formed a pair the componets would be:
choose onejust the right sized width to fit the double helixto large of a width to fit the double helixto small of a width to fit the double helix

18. Using the symbols which of the following is a correct nucleotide:
choose oneG - c - sG - c - Pg - s - P

19. Using the ladder analogy model the rungs of the ladder would be:
choose onethe sides of the ladderthe inner most part of the ladderthe outer most part of the ladder

20. A nucleotide always has:
choose oneno nitrogen basesone nitrogen basetwo nitrogen bases [pair]

21. Using the symbols for the nitrogen base cytosine [c] the correct pair would be:
choose onec - tc - Ac - G

22. Using symbols one of the folowing is correct abut the sides of the ladder:
choose onerepeating unis of s - Prepeating units of A - s - Prepeaating units of s - s

23. Using symbols which of the following is an incorrect nucleotide:
choose oneA - s - Pt - s - Gc - s - P

24. Using the symbols for the the nitrogen base thymine [t] the correct pair would be:
choose onet - Gt - At - c

25. The complexity of DNA results from a very large number of:
choose onesimilar molecular subunits that are repeated many timesdiffering molecular subunits that are rarely repeatedelements that are not yet identified

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Correct answers: