| 1. | Because DNA is a highly charged polyanion, its stability to heat denaturation |
| a. | does not depend on hydrophobic interactions |
| b. | increases with increasing salt |
| c. | is independent of G - C content |
| d. | decreases with increasing salt |
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Answer: (b).increases with increasing salt
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| 2. | The sugar in RNA is __________ , the sugar in DNA is __________ |
| a. | deoxyribose, ribose |
| b. | ribose, deoxyribose |
| c. | ribose, phosphate |
| d. | ribose, uracil |
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Answer: (b).ribose, deoxyribose
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| 3. | Nucleoside is a pyrimidine or purine base |
| a. | covalently bonded to a sugar |
| b. | ionically bonded to a sugar |
| c. | hydrogen bonded to a sugar |
| d. | none of the above |
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Answer: (a).covalently bonded to a sugar
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| 4. | In gel electrophoresis, what fragments will move most quickly through a gel? |
| a. | Large fragments |
| b. | Small fragments |
| c. | Large genome |
| d. | None of these |
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Answer: (b).Small fragments
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| 5. | Which pyrimidine base contains an amino group at carbon 4? |
| a. | Cytosine |
| b. | Thymine |
| c. | Uracil |
| d. | Adenine |
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Answer: (a).Cytosine
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