CAMPBELL BIOLOGY IN FOCUS-MOD.MASTERING
3rd Edition
ISBN: 9780135191811
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 7TYU
Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join
- A. The two strands of the double helix would separate.
- B. The phosphodiester linkages of the polynucleotide backbone would be broken.
- C. The pyrimidines would be separated from the deoxyribose sugars.
- D. AU bases would be separated from the deoxyribose sugars.
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Which statement about nonpolar interactions in the formation of the DNA double helix is INCORRECT?
A. Van der Waals interactions are nearly optimal in a double-helical structure.
B. Nonpolar surfaces of the bases are moved into contact with each other due to a more complete base stacking.
C. Nucleotide bases tend to stack even in single-stranded DNA molecules.
D. The separation distance of the planes of adjacent bases needs to be adjusted for the favorable van der Waals contacts.
E. Surface complementary maximizes the formation of hydrogen bonds and van der Waals interactions while minimizing the nonpolar surface area exposed to the aqueous environment.
Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?
Group of answer choices
A. All bases would be separated from the deoxyribose sugars
B. The purines would be separated from the deoxyribose sugars
C. The phosphodiester linkages between deoxyribose sugars would be broken
D. The two strands of the double helix would separate
E. The pyrimidines would be separated from the deoxyribose sugars
What defines one end of a DNA molecule as the 5’ end?
a. What defines the other end at the 3’ end?
b. When two strands of DNA are paired together to form a functional molecule, what is interesting to note about their 5’ and 3’ ends?
Chapter 3 Solutions
CAMPBELL BIOLOGY IN FOCUS-MOD.MASTERING
Ch. 3.1 - How are gasoline and fat chemically similar?Ch. 3.1 - Which molecules in Figure 3.4a re isomers? For...Ch. 3.1 - Prob. 3CCCh. 3.1 - Prob. 4CCCh. 3.2 - How many molecules of water are needed to...Ch. 3.2 - WHAT IF? Suppose you eat a serving of fish. What...Ch. 3.3 - Write the formula for a monosaccharide that has...Ch. 3.3 - A dehydration reaction joins two glucose molecules...Ch. 3.3 - WHAT IF? After a cow is given antibiotics to treat...Ch. 3.4 - Compare the structure of a fat (triglyceride) with...
Ch. 3.4 - Why are human sex hormones considered lipids?Ch. 3.4 - Prob. 3CCCh. 3.5 - Why does a denatured protein no longer function...Ch. 3.5 - What parts of a polypeptide participate in the...Ch. 3.5 - WHAT IF? Where would you expect a polypeptide...Ch. 3.6 - DRAW IT Go to Figure 3.27a and, for the top three...Ch. 3.6 - Prob. 2CCCh. 3.7 - How would sequencing the entire genome of an...Ch. 3.7 - Given the function of DNA, why would you expect...Ch. 3 - Which functional group is not present in this...Ch. 3 - MAKE CONNECTIONS Which chemical group is most...Ch. 3 - Prob. 3TYUCh. 3 - Which of the following statements concerning...Ch. 3 - Prob. 5TYUCh. 3 - The structural level of a protein least a fleeted...Ch. 3 - Enzymes that break down DNA catalyze the...Ch. 3 - Prob. 8TYUCh. 3 - The molecular formula for glucose is C6H12O6. What...Ch. 3 - Construct a table that organizes the following...Ch. 3 - Prob. 11TYUCh. 3 - Prob. 12TYUCh. 3 - FOCUS ON ORGANIZATION Proteins, which have diverse...Ch. 3 - Prob. 14TYUCh. 3 - SYNTHESIZE YOUR KNOWLEDGE Given that the function...
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- When two adjacent bases in the same strand of DNA dimerize (form a covalent bond between them), what happens to the DNA? a. the original strand of DNA now contains a new DNA sequence b. the original strand of DNA is prevented from opening during replication, so this section of DNA will not be replicated c. the original strand of DNA is methylated, which causes the bases to mismatch d. the original strand of DNA is kinked, which prevents DNA polymerase from working properly e. the original strand of DNA is unaffected, so no additional mutations arisearrow_forwardWhat was the contribution of Rosalind Franklin to the discovery of DNA's structure? A. X-ray diffraction images of DNA that showed that DNA had two chains twisted into a double helix with a backbone containing phosphate groups on the outside and bases on the inside B. Theoretical model of DNA's structure and the pairing of nitrogenous bases C. Discovery that in DNA the amounts of adenine and thymine were identical as were the amounts of guanine and cytosinearrow_forwardDNA strands are anti-parallel and DNA polymerase can only synthesize DNA in a 5' to 3' direction. How does the enzyme synthesize both strands at the same time? A. The leading strand is sythesised in Okazaki fragments B. The lagging strand is synthesised in short Okazaki fragments. C. Only one strand is replicated. D. There are more than one DNA polymerase involved.arrow_forward
- Which statement describes Linus Pauling's contribution to the understanding of DNA structure? a Having first discovered the spiral shape of proteins, Linus Pauling used x-ray technology to hypothesize that the DNA molecule consisted of two consistently spaced strands that formed a spiral shape. b Having originally studied proteins, Pauling proposed that DNA was a three-chained helix with a sugar-phosphate backbone at the center and bases sticking out from the backbone. c Linus Pauling conducted experiments to prove that DNA carried genetic information. d Linus Pauling studied DNA base pairing.arrow_forwardWhat was the contribution of Rosalind Franklin to the discovery of DNA's structure? a.Discovery that in DNA the amounts of adenine and thymine were identical as were the amounts of guanine and cytosine b.Theoretical model of DNA's structure and the pairing of nitrogenous bases c. X-ray diffraction images of DNA that showed that DNA had two chains twisted into a double helix with a backbone containing phosphate groups on the outside and bases on the insidearrow_forwardWhat is the major role of DNA polymerase in the DNA replication? a. Attached RNA primers to initiate the addition of complementary nucleotide sequence at the 5’ to 3’direction b. Adds up new complementary nucleotide sequence at the 3’ to 5’ direction of the DNA template. c. Unwinds the double helix by breaking the bonds at the 3’ to 5’ polymerization activity. d.It transiently cuts each strand to prevent supercoil at the 5’ to 3’ polymerization activity complementary to the RNA strandarrow_forward
- Why is DNA replication considered semiconservative? A. Both strands of each replicating DNA molecules are conserved. B. One molecule consists of the old strands and the other DNA molecule is entirely new. C. One strand of each replicating DNA molecule is conserved and the other strand is newly synthesized. D. Both strands of each replicating DNA molecule are new.arrow_forwardWhy is DNA replication considered semiconservative? a. One molecule consists of the old strands and the other DNA molecule is entirely new. b.Both strands of each replicating DNA molecule are new. c. One strand of each replicating DNA molecule is conserved and the other strand is newly synthesized. d.Both strands of each replicating DNA molecules are conserved.arrow_forwardWhat forces hold the two individual strands of DNA together to form a double helix? a. ionic bonds b. covalent bonds c. hydrophobic bonds d. hydrogen bonds e. no correct responsearrow_forward
- In a melting profile for DNA, the absorbance at 260 nm increases as result of the disruption of the DNA structure. What is the fundamental physical basis for the absorbance increase? a. the effective concentration of DNA changes b. the absorbance of DNA is highly sensitive to temperature c. native DNA absorbs light more strongly than denatured DNA because the bases are stacked d. denatured DNA absorbs light more strongly than native DNA because the bases have become unstackedarrow_forwardWhich dna strand will be synthesized continuously during dna replication? a.The strand that is synthesized as Okazki Fragments b.the strand which is synthesized in the opposite direction compared to the direction of DNA unwinding? c.the strand which is sythesized in the same direction as the same direction of DNA unwinding? d.The m-RNA like strand e. The non-template strandarrow_forwardWhat is DNA polymerase? a.An enzyme that carries out DNA replication b.Short, single strand of DNA that base-pairs with a specific DNA sequence c.An enzyme that corrects mutations that arise during the replication of DNA d.An enzyme that seals any gaps that remain between bases of replicating strands of DNAarrow_forward
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