Question 1

At what approximate wavelengths do DNA,RNA,and proteins maximally absorb light?

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Question 2

Provide an overview of the structure of Z-DNA.

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Question 3

During the polymerization of nucleic acids,covalent bonds are formed between neighboring nucleotides.Which carbons are involved in such bonds?

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Question 4

Is the accompanying figure DNA or RNA? Is the circle closer to the 5′ or 3′ end?

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Question 5

What is meant by the term antiparallel?

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Question 6

The base content of a sample of DNA is as follows: A = 31%,G = 31%,T = 19%,C = 19%.What conclusion can be drawn from this information?

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Question 7

What type of chemical bond holds the two strands together in double-stranded DNA?

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Question 8

Assume that the molar percentage of thymine in a double-stranded DNA is 20.What are the percentages of the four bases (G,C,T,A)? If the DNA is single-stranded,would you change your answer?

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Question 9

Consider the structure of double-stranded DNA.When DNA is placed into distilled water,it denatures; however,by adding NaCl,the DNA renatures.Why?

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Question 10

What is the name of the precursor molecule used in nucleic acid synthesis?

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Question 11

If the GC content of a DNA molecule is 60%,what are the molar percentages of the four bases ?(G,C,T,A)?

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Question 12

Name the pyrimidines and the purines in DNA.

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Question 13

What is the difference between a polynucleotide and an oligonucleotide?

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Question 14

Suppose that the dinucleotide in the accompanying figure was cleaved with the enzyme spleen diesterase,which breaks the covalent bond connecting the phosphate to C-5′.After such cleavage,to which nucleoside is the phosphate now attached?

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Question 15

When and in which journal did Watson and Crick publish their now-famous paper entitled "Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid."

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Question 16

All other factors being equal,the renaturation of the three classes of complementary nucleic acid sequences occurs in what order,from fastest to slowest?

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Question 17

What does it mean to say that double-stranded nucleic acids are antiparallel?

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Question 18

List three forms of DNA.

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Question 19

(a)Assume that A + T/G + C equals 0.5 in one strand of DNA.What is the ratio of these bases in the complementary strand? (b)If A + G/T + C equals 0.5 in one strand,what is the ratio of these bases in the complementary strand?

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Question 20

Is the accompanying figure DNA or RNA? Is the circle closer to the 5′ or 3′ end?

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Quiz 10: DNA Structure and Analysis

At what approximate wavelengths do DNA,RNA,and proteins maximally absorb light?

Provide an overview of the structure of Z-DNA.

During the polymerization of nucleic acids,covalent bonds are formed between neighboring nucleotides.Which carbons are involved in such bonds?

Is the accompanying figure DNA or RNA? Is the circle closer to the 5′ or 3′ end?

What is meant by the term antiparallel?

The base content of a sample of DNA is as follows: A = 31%,G = 31%,T = 19%,C = 19%.What conclusion can be drawn from this information?

What type of chemical bond holds the two strands together in double-stranded DNA?

Assume that the molar percentage of thymine in a double-stranded DNA is 20.What are the percentages of the four bases (G,C,T,A)? If the DNA is single-stranded,would you change your answer?

Consider the structure of double-stranded DNA.When DNA is placed into distilled water,it denatures; however,by adding NaCl,the DNA renatures.Why?

What is the name of the precursor molecule used in nucleic acid synthesis?

If the GC content of a DNA molecule is 60%,what are the molar percentages of the four bases ?(G,C,T,A)?

Name the pyrimidines and the purines in DNA.

What is the difference between a polynucleotide and an oligonucleotide?

Suppose that the dinucleotide in the accompanying figure was cleaved with the enzyme spleen diesterase,which breaks the covalent bond connecting the phosphate to C-5′.After such cleavage,to which nucleoside is the phosphate now attached?

When and in which journal did Watson and Crick publish their now-famous paper entitled "Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid."

All other factors being equal,the renaturation of the three classes of complementary nucleic acid sequences occurs in what order,from fastest to slowest?

What does it mean to say that double-stranded nucleic acids are antiparallel?

List three forms of DNA.

(a)Assume that A + T/G + C equals 0.5 in one strand of DNA.What is the ratio of these bases in the complementary strand? (b)If A + G/T + C equals 0.5 in one strand,what is the ratio of these bases in the complementary strand?

Is the accompanying figure DNA or RNA? Is the circle closer to the 5′ or 3′ end?