E10 - E1. The second possibility in which molecule A has +4...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
E1. The second possibility in which molecule A has +4 supercoils and molecule B has –1 supercoils fits these data. Molecule A would be more compacted because it has more supercoils. Also, molecule B would be more transcriptionally active since it is more negatively supercoiled. The first possibility does not fit the data because both molecules have the same level of supercoiling so molecule A and molecule B would have the same level of compaction. The third possibility does not fit the data because molecule B would be more compact. E2. This type of experiment gives the relative proportions of highly repetitive, moderately repetitive, and unique DNA sequences within the genome. The highly repetitive sequences renature at a fast rate, the moderately repetitive sequences renature at an intermediate rate, and the unique sequences renature at a slow rate. E3. It affects only the rate of renaturation. Denaturation occurs because the heat breaks the hydrogen bonds between the two strands. The rate of denaturation depends on the hydrogen bonding, not on the number of copies of a sequence. The rate of renaturation, however, depends on the two complementary strands “finding” each other. The rate at which two complementary strands find each other will be faster if the concentration of the two strands is higher. That is why highly repetitive sequences renature at a faster rate. E4. The amphibian probably has fewer structural genes than the mammal. The extra DNA is due to highly repetitive
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/06/2009 for the course BIO 325 taught by Professor Saxena during the Spring '08 term at University of Texas at Austin.

Page1 / 2

E10 - E1. The second possibility in which molecule A has +4...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online