BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 14, Problem 3U
Chargaff studied the composition of DNA from different sources and found that
a. the number of phosphate groups always equals the number of 5-carbon sugars.
b. the proportions of A equal that of C and G equals T.
c. the proportions of A equal that of T and G equals C.
d. purines bind to pyrimidines.
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Chargaff studied the composition of DNA from different sources and found thata. the number of phosphate groups always equals the number of five-carbon sugars.b. the proportions of A equal that of C and G equals T.c. the proportions of A equal that of T and G equals C.d. the proportions of deoxyribose equal that of ribose.
Enzymes can break down the DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?
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 sugar.
d. All bases would be separated from the deoxyribose sugars.
What provides the negative charge associated with DNA?
a. sulfhydryl groups
b. nitrogenous bases
c. phosphate groups
d. deoxyribose's hydroxyl groups
e. ribose's hydroxyl groups
Chapter 14 Solutions
BIOLOGY
Ch. 14.1 - Describe the experiments of Griffith and Avery.Ch. 14.1 - Evaluate the evidence for DNA as genetic material.Ch. 14.2 - Explain how the WatsonCrick structure rationalized...Ch. 14.2 - Prob. 2LOCh. 14.3 - Prob. 1LOCh. 14.3 - Prob. 2LOCh. 14.4 - Prob. 1LOCh. 14.4 - Prob. 2LOCh. 14.4 - Diagram the functions found at the replication...Ch. 14.5 - Compare eukaryotic replication with prokaryotic.
Ch. 14.5 - Prob. 2LOCh. 14.5 - Prob. 3LOCh. 14.6 - Prob. 1LOCh. 14.6 - Prob. 2LOCh. 14 - Prob. 1DACh. 14 - Prob. 2DACh. 14 - Prob. 1IQCh. 14 - Prob. 2IQCh. 14 - How does the structure of eukaryotic genomes...Ch. 14 - Prob. 4IQCh. 14 - Prob. 1UCh. 14 - Which of the following is NOT a component of DNA?...Ch. 14 - Chargaff studied the composition of DNA from...Ch. 14 - The bonds that hold two complementary strands of...Ch. 14 - Prob. 5UCh. 14 - Prob. 6UCh. 14 - Which of the following is NOT pan of the...Ch. 14 - If one strand of a DNA is 5 ATCGTTAAGCGAGTCA 3,...Ch. 14 - Hershey and Chase used radioactive phosphorus and...Ch. 14 - The Meselson and Stahl experiment used a density...Ch. 14 - Prob. 4ACh. 14 - If the activity of DNA ligase was removed from...Ch. 14 - Successful DNA synthesis requires all of the...Ch. 14 - The synthesis of telomeres a. uses DNA polymerase,...Ch. 14 - When mutations that affected DNA replication were...Ch. 14 - Prob. 1SCh. 14 - In the Meselson-Stahl experiment, a control...Ch. 14 - Enzyme function is critically important for the...
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- According to Chargaff’s rules for DNA base composition, if a DNA sample contained 10% guanine, the sample should have: A. 40% cytosine B. 90% cytosine C. 10% adenine D. 40% thyminearrow_forwardWhich statement about DNA bases is true? A. Adenine and guanine are purines. B. Thymine and adenine are pyrimidines. C. Guanine and cytosine are pyrimidines. D. Guanine and cytosine are purines. E. None are correctarrow_forwardIf the DNA of an organism contains 20% adenine, what is its percentage of guanine? a.20% b.60% c.80% d.30%arrow_forward
- "Chargaff's rules" about the composition of bases in DNA dictates that A. the sum of purine residues must equal the sum of pyrimidine residues. B. the sum of A-T base pairs must equal the sum of G-C base pairs. C. the base composition of DNA is the same in all species. D. DNA specimens isolated from different tissues of the same species vary in base composition.arrow_forwardWhich of the following is the correct way that heterocyclic bases are paired between two polypeptide chains of DNA? a. Pyrimidines-Pyrimidines b. Purine-Pyrimidine c. Purines-Purine d. Sugar-Phosphatearrow_forwardThe antiparallel nature of DNA refers to a. its charged phosphate groups. b. the pairing of bases on one strand with bases on the other strand. c. the formation of hydrogen bonds between bases from opposite strands. d. the opposite direction of the two strands of nucleotides.arrow_forward
- How many base pairs are there in a 6.8 nanometer DNA sequence? A. 5 B. 10 C. 15 D. 20arrow_forwardWhich of the following are nucleotide base pairs found in DNA? Select all that apply. A. Adenine and thymine B. Cytosine and adenine C. Thymine and guanine D. Guanine and cytosinearrow_forwardConsidering the principle of complementary base pairing, you would expect an equal ratio of which two nitrogenous bases in a DNA molecule? a. guanine and thymine b. uracil and adenine c. thymine and cytosine d. cytosine and guanine e. adenine and guaninearrow_forward
- In the dideoxy-sequencing reaction, what terminates DNA synthesis at a particular base? a. The absence of a base on the ddNTP halts the DNA polymerase. b. The ddNTP causes a break in the sugar–phosphate backbone. c. DNA polymerase will not incorporate a ddNTP into the growing DNA strand. d. The absence of a 3′-OH group on the ddNTP prevents the addition of another nucleotide.arrow_forwardWhat describes or designates the 3' end of a DNA strand? a. an available hydroxyl group on the 5th carbon of a deoxyribose of a terminal nucleotide b. an available phosphate group on the 3rd carbon of a deoxyribose of a terminal nucleotide c. an available hydroxyl group on the 3rd carbon of a deoxyribose of a terminal nucleotide d. an available hydroxyl group on the 2nd carbon of a deoxyribose of a terminal nucleotidearrow_forwardWhat will most likely be the effect of the change in the DNA molecule? * A. the change will cause a harmful mutation B. the DNA molecule will be unable to replicate C. the organism will be reproduce D. the DNA molecules will code for a different protein Original strand: T A C G T A T G A A G C, Mutant strand: T A G C T A T G A A G C. what type of mutation? * A. Substitution B. Deletion C. Insertion D. Nonsense Which mechanism contributes to accuracy during DNA Replication? * A. The mismatch repair system recognizes an incorrect base-pair and corrects the mistake in the non-methylated strand B. Using primers increase accuracy because the first nucleotides is a new nucleic acid chain are more like to be correct. C. all DNA polymerase have a 5'-3' exonuclease activity which can remove…arrow_forward
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