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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