Homework Help is Here – Start Your Trial Now!
Science
Biochemistry
A DNA sample is found to contain 15% A residues. Use Chargaff's rules to estimate the percent G residues. 15% G 20% G 30% G 35% G

A DNA sample is found to contain 15% A residues. Use Chargaff's rules to estimate the percent G residues. 15% G 20% G 30% G 35% G

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question
Please help
**Understanding Chargaff's Rules** **Question:** A DNA sample is found to contain 15% A residues. Use Chargaff's rules to estimate the percent G residues. **Options:** - 15% G - 20% G - 30% G - 35% G **Explanation:** Chargaff's rules state that in any given DNA sample, the amounts of adenine (A) and thymine (T) are equal, and the amounts of guanine (G) and cytosine (C) are equal. This is because A pairs with T and G pairs with C. If the percentage of adenine (A) is 15%, then the percentage of thymine (T) will also be 15%. The total percentage of A and T combined is: \[ 15\% + 15\% = 30\% \] Since the total proportion of all bases in DNA must equal 100%, the remaining percentage (which consists of both G and C) is: \[ 100\% - 30\% = 70\% \] As per Chargaff's rule, the percentage of guanine (G) will be equal to the percentage of cytosine (C), hence: \[ \frac{70\%}{2} = 35\% \] **Answer:** 35% G
Transcribed Image Text:**Understanding Chargaff's Rules** **Question:** A DNA sample is found to contain 15% A residues. Use Chargaff's rules to estimate the percent G residues. **Options:** - 15% G - 20% G - 30% G - 35% G **Explanation:** Chargaff's rules state that in any given DNA sample, the amounts of adenine (A) and thymine (T) are equal, and the amounts of guanine (G) and cytosine (C) are equal. This is because A pairs with T and G pairs with C. If the percentage of adenine (A) is 15%, then the percentage of thymine (T) will also be 15%. The total percentage of A and T combined is: \[ 15\% + 15\% = 30\% \] Since the total proportion of all bases in DNA must equal 100%, the remaining percentage (which consists of both G and C) is: \[ 100\% - 30\% = 70\% \] As per Chargaff's rule, the percentage of guanine (G) will be equal to the percentage of cytosine (C), hence: \[ \frac{70\%}{2} = 35\% \] **Answer:** 35% G
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Medical terminologies
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biochemistry and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781319114671
Author:
Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:
W. H. Freeman
Lehninger Principles of Biochemistry
Lehninger Principles of Biochemistry
Biochemistry
ISBN:
9781464126116
Author:
David L. Nelson, Michael M. Cox
Publisher:
W. H. Freeman
Fundamentals of Biochemistry: Life at the Molecul…
Fundamentals of Biochemistry: Life at the Molecul…
Biochemistry
ISBN:
9781118918401
Author:
Donald Voet, Judith G. Voet, Charlotte W. Pratt
Publisher:
WILEY
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781305961135
Author:
Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher:
Cengage Learning
Biochemistry
Biochemistry
Biochemistry
ISBN:
9781305577206
Author:
Reginald H. Garrett, Charles M. Grisham
Publisher:
Cengage Learning
Fundamentals of General, Organic, and Biological …
Fundamentals of General, Organic, and Biological …
Biochemistry
ISBN:
9780134015187
Author:
John E. McMurry, David S. Ballantine, Carl A. Hoeger, Virginia E. Peterson
Publisher:
PEARSON
SEE MORE TEXTBOOKS