2. Which of the follwoing has an incorrect nitrogen base pair: choose one A - t, c - t, t - A, G - c c - G, G - c, t - A t - A, A - t, c - G
3. In a DNA molecule there are: choose one tow different kinds of nucleotides four different kinds of nucleotides billions of different kinds of nucleotides
4. Guaine and Adenine are both: choose one Pyrimidines Purines Sugars
5. The DNA molecule is made up of: choose one less than 10 different types of molecular subunits 100's of different types of molecular subunits 100 000's of different types of molecular subunits
6. Using the symbols for the nitrogen base thymine [t] the correct pair would be: choose one t - G t - c t - A
7. Using the ladder analogy model the rungs of the ladder would be: choose one the sides of the ladder the innermost part of the ladder the outermost part of the ladder
8. A phosphate molecular subunit is made up of mainlly of: choose one Phosphorous Oxygen Carbon
9. Using symbols one of the following is correct about the sides of the ladder model: choose one repeating units of s - P repeating units of A - s - P repeating units of s - s
10. Using the ladder analogy model the sides of the ladder would be: choose one the rungs of the ladder the inner most part of the ladder the outer most part of the ladder
11. Using the symbols for the nitrogen base cytosine [c] the correct pair would be: choose one c - t c - A c - G
12. The ladder analogy results from: choose one winding the DNA molecule unwinding the DNA molecule seperating the DNA moleucle into nucleotide units
13. A nucleotide always has: choose one no nitrogen bases one nitrogen base two nitrogen bases [pair]
14. A sugar is made up of: choose one a five membered ring a six membered ring a five and a six membered ring
15. Using the ladder analogy model the sides of the ladder would be: choose one the rungs of the ladder the inner most part of the ladder the outer most part of the ladder
16. If one purine and one pyrimidine formed a pair the components would be: choose one Just the right width to fit the double helix to large of a width to fit the double helix to small of a width to fit the double helix
17. A nucleotide iss made up of: choose one nitrogen base - sugar - nitrogen base nitrogen base - phosphate - phosphate nitrogen base - sugar - phosphate
18. The number of different nucleotides in DNA are: choose one 100 000 or more 100 or more 10 or less
19. The sides of the ladder analogy model are made up of: choose one repeating units of sugars repeating units of phosphates repeating units of sugar and phosphate
20. A sugar is made up of: choose one a five membered ring a six membered ring a five and a six membered ring
21. Using symbols which of the following is an incorrect nucleotide: choose one A - s - P t - s - G c - s - P
22. The rungs of the ladder analogy model are made up of: choose one repeating units of purines repeating units of pyrimidines repeating units of purines and pyrimidines
23. Using the symbols for the nitrogen base Adenine [A] the correct pair would be: choose one A - t A - G A - c
24. Using sysmbols which of the following is a correct nucleotide: choose one G - c - s G - c - P G - s - P
25. The number of elements necessary for life are: choose one less than 10 different elements 100's of different elements 100 000's of different elements
Score = Correct answers: