2. 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

3. In a DNA molecule there are:
choose onetow different kinds of nucleotidesfour different kinds of nucleotidesbillions of different kinds of nucleotides

4. Guanine and Adenine are both:
choose onePyrimidinesPurinesSugars

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

6. Using the symbols for the nitrogen base thymine [t] the correct pair would be:
choose onet - Gt - ct - A

7. Using the ladder analogy model the rungs of the ladder would be:
choose onethe sides of the ladderthe innermost part of the ladderthe outermost part of the ladder

8. A phosphate molecular subunit is made up of mainly of:
choose onePhosphorousOxygenCarbon

9. Using symbols one of the following is correct about the sides of the ladder model:
choose onerepeating units of s - Prepeating units of A - s - Prepeating units of s - s

10. 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

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

12. The ladder analogy results from:
choose onewinding the DNA moleculeunwinding the DNA moleculeseparating the DNA molecule into nucleotide units

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

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

15. 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

16. If one purine and one pyrimidine formed a pair the components would be:
choose oneJust the right width to fit the double helixto large of a width to fit the double helixto small of a width to fit the double helix

17. A nucleotide is made up of:
choose onenitrogen base - sugar - nitrogen basenitrogen base - phosphate - phosphatenitrogen base - sugar - phosphate

18. The number of different nucleotides in DNA are:
choose one100 000 or more100 or more10 or less

19. The sides of the ladder analogy model are made up of:
choose onerepeating units of sugarsrepeating units of phosphatesrepeating units of sugar and phosphate

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

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

22. The rungs of the ladder analogy model are made up of:
choose onerepeating units of purinesrepeating units of pyrimidinesrepeating units of purines and pyrimidines

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

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

25. The number of elements necessary for life are:
choose oneless than 10 different elements100's of different elements 100 000's of different elements

Score = 
Correct answers: