GENETIC ANALYSIS: AN INTEG. APP. W/MAS
2nd Edition
ISBN: 9781323142790
Author: Sanders
Publisher: Pearson Custom Publishing
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Chapter 7, Problem 6P
The principles of complementary base pairing and antiparallel polarity of
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In the Watson-Crick model for the DNA double helix (B form) the A-T and G-C base pairs share all
but one of the following properties. Which is the exception?
None of the proton-binding groups in the purine and pyrimidine bases is in its charged or ionized form.
The plane of the base pair is roughly perpendicular to the axis of the helix in each case.
The number of hydrogen bonds formed between the two bases of the base pair is the same.
O The distance between the two glycosidic (base-sugar) bonds is the same in both base pairs, within a few
tenths of an angstrom.
In the Watson-Crick DNA base pairing model, Adenine (A) binds to thymine (T), guanine (G) binds to cytosine (C).Draw the structures of thymine and adenine stabilized by Watson-Crick base pair interaction. Also draw the structure of the amide group of glutamine in an interaction of this T-A pair in a way that maximally satisfies the hydrogen bonding capacity of amide.
According to Chargaff's rule of nitrogenous base pairing, which of the following statements is correct?
If all adenine bonds to thymine and all cytosine pairs with guanine, then the sum of all adenine will never be equal to the sum of all thymine in a DNA molecule.
If all adenine bonds to thymine and all cytosine pairs with guanine, then the sum of all adenine will never be equal to the sum of all thymine in an RNA molecule.
If all adenine bonds to thymine and all cytosine pairs with guanine, then the sum of all adenine equals the sum of all thymine in a DNA molecule.
If all adenine bonds to uracil and all cytosine pairs with guanine, then the sum of all adenine will never be equal to the sum of all uracil in an RNA molecule.
Chapter 7 Solutions
GENETIC ANALYSIS: AN INTEG. APP. W/MAS
Ch. 7 - What results from the experiments of Frederick...Ch. 7 - 7.2 Explain why Avery, MacLeod, and McCarty’s in...Ch. 7 - 7.3 Hershey and Chase selected the bacteriophage...Ch. 7 - 7.4 Explain how the Hershey and Chase experiment...Ch. 7 - 7.5 One strand of a fragment of duplex DNA has the...Ch. 7 - 7.6 The principles of complementary base pairing...Ch. 7 - For the following fragment of DNA, determine the...Ch. 7 - 7.8 Figures present simplified depictions of...Ch. 7 - 7.9 Consider the sequence -ACGCTACGTC-.
What is...Ch. 7 - DNA polymerase III is the main DNA-synthesizing...
Ch. 7 - Explain how RNA participates in DNA replication.Ch. 7 - A sample of double-stranded DNA is found to...Ch. 7 - Bacterial DNA polymerase I and DNA polymerase III...Ch. 7 - Diagram a replication fork in bacterial DNA and...Ch. 7 - Prob. 16PCh. 7 - Which of the following equalities is not true for...Ch. 7 - List the order in which the following proteins and...Ch. 7 - Two viral genomes are sequenced, and the following...Ch. 7 - Matthew Meselson and Franklin Stahl demonstrated...Ch. 7 - Raymond Rodriguez and colleagues demonstrated...Ch. 7 - 7.22 Joel Huberman and Arthur Riggs used pulse...Ch. 7 - 7.23 Why do the genomes of eukaryotes, such as...Ch. 7 - Bloom syndrome (OMIM 210900) is an autosomal...Ch. 7 - 7.25 How does rolling circle replication (see...Ch. 7 - Telomeres are found at the ends of eukaryotic...Ch. 7 - A family consisting of a mother (I-1), a father...Ch. 7 - In a dideoxy DNA sequencing experiment, four...Ch. 7 - Prob. 29PCh. 7 - Using an illustration style and labeling similar...Ch. 7 - A PCR reaction begins with one double-stranded...Ch. 7 - Prob. 32PCh. 7 - Three independently assorting VNTR markers are...Ch. 7 - 7.34 A sufficient amount of a small DNA fragment...Ch. 7 - Prob. 35P
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- DNA molecules consist of chemically linked sequences of the bases adenine, guanine, cytosine, and thymine, denoted A, G, C, and T. A sequence of three basesiscalleda codon. A base may appear more than once in a codon. a) How many different codons are there? b) The bases A and G are purines, while C and T are pyrimidines. How many codons are there whose first and third bases are purines and whose second base is a pyrimidine? c) How many codons consist of three different bases?arrow_forwardWhich of the molecules of RNA is the most likely to fold into a specific structure as a result of intramolecular (within itself) base-pairing? Explain. 5′-CCCUAAAAAAAAAAAAAAAAUUUUUUUUUUUUUUUUAGGG-3′ 5′-UGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUG-3′ 5′-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-3′ 5′-GGAAAAGGAGAUGGGCAAGGGGAAAAGGAGAUGGGCAAGG-3′arrow_forwardTo create a DNA:RNA hybrid from a short stretch of DNA with the sequence 5'-GGCTAAGTATGCCTAGTAGC-3', design the corresponding RNA sequence. Indicate the sequence in a 5' to 3' manner. What type of helix (A, B or Z) will this double-stranded nucleic acid form?arrow_forward
- Molnupiravir causes widespread mutations as SARS-CoV-2 replicates its genome because in an RNA double helix molnupiravir can base pair with more than one base. Shown below are the structures the RNA bases. With which two bases does molnupiravir pair? H N-H Adenine NH-N Uracil H H-N N-HN N-H Guanine H Cytosine A. The "imino" form pairs with A; the "amino" form pairs with G. B. The "imino" form pairs with G; the "amino" form pairs with A. C. The "imino" form pairs with U; the "amino" form pairs with C. D. The "imino" form pairs with C, the "amino" form pairs with U.arrow_forwardA duplex DNA molecule contains a random sequence of the four nucleotides with equal proportions of each. What is the average spacing between consecutive occurrences of the sequence 5'-ATGC-3'? Between consecutive occurrences of the sequence 5'-TACGGC-3'?arrow_forwardGiven the structures of the nitrogenous bases shown in the picture, draw the structure of a part of DNA with the sequence: 5'-GTTCA-3'.arrow_forward
- An analysis of the genetic material of an unknown sample showed that it contains 1996 adenine bases, 2131 guanine bases, 1642 uracil bases and 2365 cytosine bases. Which one of the following describes the genetic material of the unknown sample? * Single Stranded DNA Single Stranded RNA Double Stranded DNA Double Stranded RNA Match the statement to the correct molecule. * Cytosine Cytosine Nucleobases Guanine Guanine Base pairarrow_forwardGiven the sequence shown below, write the complementary DNA sequence, using the base-pairing rules, as well as the directionality of the strands: 5'- CGAGGCTAGGTTAACCTG-3'arrow_forwardThe formation of a double-stranded structure must obey the rule that adenine hydrogen bonds to thymine (or uracil in RNA) and cytosine hydrogen bonds to guanine. Discuss reasons why complementarity is an important feature of DNA and RNA structure and function.arrow_forward
- If you analyze a double-stranded DNA molecule and find that 15% of all the nucleotide bases are Adenines, you know that there must also be [ Select ] Thymines, [ Select ] Guanines, [ Select ] v Cytosines and [ Select ] Uracils. (Count each of the bases in any double stranded DNA molecule and calculate their percentages to find the simple key for this if you haven't seen it yet.)arrow_forwardHairpins may form at palindromic sequences in single strands of either RNA or DNA. How is the helical structure of a long and fully base-paired (except at the end) hairpin in RNA different from that of a similar hairpin in DNA?arrow_forwardState the properties of the Watson-Crick model of DNA in the following categories: a) number of polynucleotide chains b) polarity (strand direction running same or opposite c) bases on interior or exterior of molecule d) sugar/phosphate on interior or exterior of molecule e) which bases pair with which f) right- or left-handed helixarrow_forward
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