2. For each DNA sample, draw a linear stretch of DNA about 15 nucleotides long, with a nucleotide composition that corresponds to its data set. With a dotted line, illustrate the hydrogen bonds between the complementary base pairs.

Biology Today and Tomorrow without Physiology (MindTap Course List)
5th Edition
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Christine Evers, Lisa Starr
Chapter6: Dna Structure And Function
Section: Chapter Questions
Problem 2DID
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Background
Erwin Chargaff discovered that although the nucleotide composition of DNA varies from
one species to another, that composition always follows certain rules. While variation in
nucleotides helps to explain the complexity of life, the physical structure of the DNA
itself can also help certain organisms adapt to particular environments.
Imagine you are working with a research team sampling the ocean floor near a hot vent
that releases a steady stream of hot water. The hot water has a temperature of about
45°C, while the surrounding ocean has a temperature of 6°C.
Nucleotide
Presence in DNA of bacterial
Presence in DNA of bacterial
sample 1 (percent)
sample 2 (percent)
adenine
21
36
cytosine
guanine
thymine
Your team collects two samples of bacteria - one from the mouth of the hot vent and one
from the ocean floor about 20 m away. When you return to the lab, you isolate the DNA
from these bacteria to determine their nucleotide composition. The table shows the
results of your test for the adenine content of the DNA.
Transcribed Image Text:Background Erwin Chargaff discovered that although the nucleotide composition of DNA varies from one species to another, that composition always follows certain rules. While variation in nucleotides helps to explain the complexity of life, the physical structure of the DNA itself can also help certain organisms adapt to particular environments. Imagine you are working with a research team sampling the ocean floor near a hot vent that releases a steady stream of hot water. The hot water has a temperature of about 45°C, while the surrounding ocean has a temperature of 6°C. Nucleotide Presence in DNA of bacterial Presence in DNA of bacterial sample 1 (percent) sample 2 (percent) adenine 21 36 cytosine guanine thymine Your team collects two samples of bacteria - one from the mouth of the hot vent and one from the ocean floor about 20 m away. When you return to the lab, you isolate the DNA from these bacteria to determine their nucleotide composition. The table shows the results of your test for the adenine content of the DNA.
2. For each DNA sample, draw a linear stretch of DNA about 15 nucleotides long, with
a nucleotide composition that corresponds to its data set. With a dotted line,
illustrate the hydrogen bonds between the complementary base pairs.
Transcribed Image Text:2. For each DNA sample, draw a linear stretch of DNA about 15 nucleotides long, with a nucleotide composition that corresponds to its data set. With a dotted line, illustrate the hydrogen bonds between the complementary base pairs.
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