In 1950 Erwin Chargaff published a scientific paper showing the percentages of the nitrogen bases adenine (A), thymine (T), cytosine (C), and guanine (G) in the DNA of different types of organisms. His analysis of the data revealed key understandings about the structure of DNA. In 1953, Watson and Crick discovered the structure of DNA by examining data from many different experiments. How did using Chargaff's data help Watson and Crick determine the structure of DNA? Chargaff's data helped Watson and Crick determine the specific bonding rules between the four nitrogen bases that make up the genetic code in organisms. Chargaff's data helped Watson and Crick determine that all organisms have the same percentage of adenine. Chargaff's data helped Watson and Crick identify the sequences of bases that code for the amino acid in a protein.

In 1950 Erwin Chargaff published a scientific paper showing the percentages of the nitrogen bases adenine (A), thymine (T), cytosine (C), and guanine (G) in the DNA of different types of organisms. His analysis of the data revealed key understandings about the structure of DNA. In 1953, Watson and Crick discovered the structure of DNA by examining data from many different experiments. How did using Chargaff's data help Watson and Crick determine the structure of DNA? Chargaff's data helped Watson and Crick determine the specific bonding rules between the four nitrogen bases that make up the genetic code in organisms. Chargaff's data helped Watson and Crick determine that all organisms have the same percentage of adenine. Chargaff's data helped Watson and Crick identify the sequences of bases that code for the amino acid in a protein.

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter8: The Structure, Replication, And Chromosomal Organization Of Dna

Section: Chapter Questions

Problem 12QP: DNA contains many hydrogen bonds. Are hydrogen bonds stronger or weaker than covalent bonds? What...

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22-71 Indicate whether each of the following statementsinvolving differences between DNA and RNA moleculesis true or false.a. Base pairing occurs in DNA but not in RNA.b. Both DNA and RNA are double-stranded molecules.c. RNA molecules are much larger than DNAmolecules.d. The base T in DNA is replaced by the base A in RNA
Demuestra lo que sabes del vo X ure.com/courses/57129/quizzes/206819/take Question I8 1 pts 3.7- Chargaff's Rule & The Hayflick Limit In 1950, Erwin Chargaff analyzed the base pair composition of DNA. He discovered that... % Adenine = % Thymine % Cytosine = % Guanine Meaning... There are equal amounts of Adenine and Thymine and equal amounts of Cytosine and Guanine in any given DNA sample. Question: Which of these statements is TRUE if there is 40% Guanine in a strand of DNA? There is 20% Adenine O There is 15% Thymine O There is 10% Cytocine O There is 10% Adenine
The backbone of the DNA molecule is made up of two alternating componebts, what are these? Explain.
QUESTION 21 Choose each of the characteristic(s) of all RNA polymerases from the list below. A. elongation adds new ribonucleotides to the 3-OH B. requires a primer to initiate synthesis C. have 3' to 5' exonuclease activity D. adds nucleotides based on sequence complementarity to a template E. have 5' to 3' polymerase activity O F. elongation adds new ribonucleotides to the 2'-OH G. have 3' to 5' polymerase activity
Question 1. The nitrogenous base content of a sample of DNA was found to be 34% adenine. Determine the amounts of the other three bases in this sample.
Z-DNA derives its name from the zig-zag conformation of phosphate groups. What features of the DNA molecule allow this structure to form?
Question 8. You isolate the DNA from the bacterial cells and apply the Sanger dideoxy sequencing method. You then separate the products of the reactions by gel electrophoresis and obtain the following pattern. What is the sequence of the template and the DNA on the gel? ddATP ddTTP ddCTP ddGTP Template V [ Choose 3'-CTAGTCAAGG-5' 5'-CTAGTCAAGG-3' Sequence 3'-GATCAGTTCC-5' 5'-GATCAGTTCC-3' 5'-GGAACTGATC-3'
Question 18 Which of the following activities of DNA pol I is MOST important in proofreading? A) 5' to 3' exonuclease B polymerase activity ligation activity (D) 3' to 5' exonuclease
Question 5 Review Figure 21.6 types of DNA sequences in the human genome. The lowest percentage of human genome O repetitive DNA related to transposable elements and related sequences (L1 sequences and Alu elements) O repetitive DNA unrelated to transposable elements (simple sequence and large-segment duplications O unique noncoding DNA O introns O exons O regulatory sequences
b) Among the progeny from the Hfr3 mating above, you find one that has the genotype: Abc de F Draw out the gene transfer and crossover(s) that produced this outcome: c) Among the progeny from the Hfr3 mating above, you find one that has the genotype: A B c d e f Draw out the gene transfer and crossover(s) that produced this outcome:
Question 2. You have a wild-type strain of E. coli with the genotype A B C D EF You introduce an F+ plasmid into your wild-type strain and isolated a few Hfr derivative strains that you call Hfr1, Hfr2, and Hfr3. You are studying several new genes in E. coli with interesting phenotypes. You obtain a multiply mutant strain with chromosomal genotype: a b c d e f a) You mate each Hfr strain to your multiply-mutant strain in a separate experiment. At various times you interrupt the matings and plate the bacteria under conditions in which only the recipient strain can grow. You obtain the following earliest-time-of-entry data, in minutes: Gene Hfr1 Hfr2 Hfr3 A B C D E F 11 13 7 I 26 16 11 9 5 31 15 27 31 11 Draw a map of these genes that is consistent with the data, including all the genes and Hfr origins, the distances between them (in minutes), and the direction of transfer of each Hfr.
Question 1 Short wavelength UV radiation wavelength will cause O 2540-2600 pm; protein denaturation O 254-260 micrometers; thymine dimer formation in RNA 254-260 mm; thymine dimer formation in DNA 254-260 nm; thymine dimer formation in DNA Question 2