E-PolyLearning

Welcome to the largest collection of MCQs on the Internet. Access and Discuss these Multiple choice questions for various competitive Exams and Interviews.
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

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

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

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

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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