Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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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 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.
What was the purpose of the sodium chloride in nucleic acid extraction? CHOOSE ALL ANSWERS THAT APPLY
A Sodium chloride binds mostly to the proteins associated with the DNA.
B Sodium ions bind to the phosphate groups in DNA.
C Chloride ions bind to the phosphate groups in DNA.
D Sodium chloride shields the DNA protecting it from degrading,
E Sodium ions bind to the deoxyribose in the DNA.
Levene made which contribution to our understanding of DNA structure?
a. He determined that the nucleus contains DNA.
b. He determined that DNA contains four nitrogenous bases
c. He determined that DNA consists of nucleotides.
d. He determined that the nitrogenous bases of DNA are present in regular ratios
Chapter 14 Solutions
Biology
Ch. 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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- If DNA of a particular species was analyzed and it was found that it contains 27 percent A, what would be the percentage of C? a. 27 percent b. 30 percent c. 23 percent d. 54 percentarrow_forwardHow do amino acids in DNA-binding proteins interact with DNA? a. By forming covalent bonds with DNA bases b. By forming hydrogen bonds with DNA bases c. By forming covalent bonds with DNA sugarsarrow_forwardWhat 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?arrow_forward
- How is each new nucleotide added to the growing end of a DNA strand? a. A dehydration reaction joins the monomer to the new strand b. By using DNA polymerase c. Both of the above d. A hydrolytic reaction joins the monomer to the new strandarrow_forwardDescribe What were different types of chemical bonds are found in DNA and where are they found?arrow_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
- Chargaff's analysis of the relative base composition of DNA showed us that a. The amount of adenine is equivalent to cytosine, and thymine is equivalent to guanine b. The amount of purines is equivalent to the amount of pyrimidines c. All four nitrogenous bases occur in equal amounts in DNA d. The base composition of a species' DNA is random e. None of the above are truearrow_forwardChoose the combination of answers that most accurately completes the statement. Why must the lagging strand of DNA be replicated in short pieces? a. because of limited space b. otherwise, the helix will become distorted c. the DNA polymerase can synthesize in only one direction d. to make proofreading of code easierarrow_forwardChoose the combination of answers that most accurately completes the statement.Why must the lagging strand of DNA be replicated in short pieces? a. because of limited space b. otherwise, the helix will become distorted c. the DNA polymerase can synthesize in only one direction d. to make proofreading of code easierarrow_forward
- What is DNA polymerase? A. An enzyme that corrects mutations that arise during the replication of DNA B. An enzyme that seals any gaps that remain between bases of replicating strands of DNA C. Short, single strand of DNA that base-pairs with a specific DNA sequence D. An enzyme that carries out DNA replicationarrow_forwardMake a simple illustration to relate the different kinds of DNA to its function.arrow_forwardBase analogs are mutagenic because of which characteristic? a. They produce changes in DNA polymerase that cause it to malfunction. b. They distort the structure of DNA. c. They are similar in structure to the normal bases. d. They chemically modify the normal bases.arrow_forward
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