Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
4th Edition
ISBN: 9781319154639
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 6, Problem 2SA
Summary Introduction
To analyze:
What percentage of bases would you expect thymine to be, if 20% of the bases are cytosine; why?
Introduction:
The amount of guanine and cytosine will be equal, and the amount of adenine and thymine will be equal.
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Students have asked these similar questions
A double-stranded DNA molecule is 1 cm long, and the percentage of adenine is 15%. How many cytosines does this DNA molecule contain?
If you analyze a double-stranded DNA molecule and find that 15% of all the nucleotide bases are
Adenines, you know that there must also be [ Select ]
Thymines,
[ Select ]
Guanines, [ Select ]
v Cytosines and
[ Select ]
Uracils. (Count each of the bases in any double stranded DNA molecule
and calculate their percentages to find the simple key for this if you haven't seen it yet.)
The base composition for one of the strands of a DNA
double helix is 19% A, 34% C, 28% G, and 19% T. What
is the percent base composition for the other strand of
the DNA double helix?
Chapter 6 Solutions
Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Chemical analysis shows that a nucleic acid sample contains A, U, C, and G. Is this DNA or RNA? Why?arrow_forwardDNA contains many hydrogen bonds. Are hydrogen bonds stronger or weaker than covalent bonds? What are the consequences of this difference in strength?arrow_forwardHow many possible nucleotide sequences are there for a stretch of DNA that is N nucleotides long, if it is (a) single- stranded or (b) double-stranded?arrow_forward
- If a 100 base-pair double-stranded DNA fragment has 40 cytosines, how many adenines does it contain?arrow_forwardA B-DNA molecule has 1 million nucleotide pairs. How many complete turns of the helix are there in this molecule?arrow_forwardIn a segment of DNA consisting of 1000 nitrogen bases, 28% of which are thymine, how many bases are adenine, guanine, and cytosine?arrow_forward
- Let’s assume the linker region of DNA averages 54 bp in length. How many molecules of H2A would you expect to find in a DNA sample that is 46,000 bp in length?arrow_forwardIf a DNA double helix contains 28% T nucleotides, then what is the percentage of A nucleotides?arrow_forwardA DNA sample contains 21% adenine. What is the complete percentage base composition?arrow_forward
- Moira, a biochemistry major, wanted to explore the shapes a single-stranded DNA molecule can take. She sketched the two shapes below. Her professor was impressed with Moira’s imagination and artistic ability, but she informed Moira that only one of her sketches was feasible. In the sketches, the lines indicate complementary base pairing. (d) Would a new double-stranded molecule assume the shape similar to one in the drawing? (e) Why or why not?arrow_forwarda) Explain the effect of the guanine:cytosine ratio on melting temperature of DNA. b) The Hershey-Chase experiment proved that DNA is the genetic material and not protein. Explain in detatil how this experiment was conducted.arrow_forwardThe two sides of the DNA double helix are connected by pairs of bases (adenine, thymine, cytosine, and guanine). Because of the geometric shape of these molecules, adenine bonds with thymine and cytosine bonds with guanine. The figure (Figure 1) shows the thymine-adenine bond. Each charge shown is ±e, and the H−N distance is 0.110 nm . Calculate the net force that thymine exerts on adenine. To keep the calculations fairly simple, yet reasonable, consider only the forces due to the O−H−N and the N−H−N combinations, assuming that these two combinations are parallel to each other. Remember, however, that in the O−H−N set, the O− exerts a force on both the H+ and the N−, and likewise along the N−H−N set. Express your answer in newtons. Is the net force attractive or repulsive?arrow_forward
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