Question 1

As genome complexity increases, the time required for reannealing

Accepted Answer

A)  doesn't change 
B)  increases 
C)  decreases 
D)  either B or C depending on the genome 
A)  doesn't change 
B)  increases 
C)  decreases 
D)  either B or C depending on the genome

Question 2

Use a graph to illustrate the effect of lowering the salt concentration of a solution on the melting temperature (Tm) of a DNA sample. What is the explanation for this relationship?

Accepted Answer

When the salt concentration of a solutio

Question 3

Which form of DNA is predominant in cells - A, B, or Z DNA? Do other forms ever occur under special circumstances? Explain your answers.

Accepted Answer

The predominant form of DNA in cells is

Question 4

The DNA duplexes below are denatured and then allowed to reanneal. Which of the two molecules would have the highest Tm? Which of the two is least likely to re-form the original structure? Why?
(a) 5′-ATATCATATGATATGTA-3′
 3′-TATAGTATACTATACAT-5′
(b) 5′-CGGTACTCGTGCAGGT-3′
 3′-GCCATGAGCACGTCCA-5′

Accepted Answer

The DNA molecule shown in (b) would have

Question 5

Which statement is not true about Z-DNA?

Accepted Answer

A)  Z-DNA forms a left-handed helix 
B)  Z-DNA is not present in cells 
C)  Z-DNA may play a role in regulating gene expression 
D)  At a B-Z junction, one base pair is extruded from the DNA helix 
A)  Z-DNA forms a left-handed helix 
B)  Z-DNA is not present in cells 
C)  Z-DNA may play a role in regulating gene expression 
D)  At a B-Z junction, one base pair is extruded from the DNA helix

As genome complexity increases, the time required for reannealing

Use a graph to illustrate the effect of lowering the salt concentration of a solution on the melting temperature (T_m) of a DNA sample. What is the explanation for this relationship?

Which form of DNA is predominant in cells - A, B, or Z DNA? Do other forms ever occur under special circumstances? Explain your answers.

Which statement is not true about Z-DNA?

The Beginnings of Molecular Biology

The Versatility of RNA

Protein Structure and Folding

Genome Organization and Evolution

DNA Replication and Telomere Maintenance

DNA Repair Pathways

Recombinant Dna Technology and Molecular Cloning

Tools for Analyzing Gene Expression

Transcription in Bacteria

Transcription in Eukaryotes

Epigenetic Mechanisms of Gene Regulation

RNA Processing and Post-Transcriptional Gene Regulation

The Mechanism of Translation

Genetically Modified Organisms: Use in Basic and Applied Research

Genome Analysis: DNA Typing, Genomics, and Beyond

Medical Molecular Biology

Filters

Exam 2: The Structure of DNA

As genome complexity increases, the time required for reannealing

Use a graph to illustrate the effect of lowering the salt concentration of a solution on the melting temperature (Tm) of a DNA sample. What is the explanation for this relationship?

Which form of DNA is predominant in cells - A, B, or Z DNA? Do other forms ever occur under special circumstances? Explain your answers.

Which statement is not true about Z-DNA?

The Beginnings of Molecular Biology

The Versatility of RNA

Protein Structure and Folding

Genome Organization and Evolution

DNA Replication and Telomere Maintenance

DNA Repair Pathways

Recombinant Dna Technology and Molecular Cloning

Tools for Analyzing Gene Expression

Transcription in Bacteria

Transcription in Eukaryotes

Epigenetic Mechanisms of Gene Regulation

RNA Processing and Post-Transcriptional Gene Regulation

The Mechanism of Translation

Genetically Modified Organisms: Use in Basic and Applied Research

Genome Analysis: DNA Typing, Genomics, and Beyond

Medical Molecular Biology

Filters

Use a graph to illustrate the effect of lowering the salt concentration of a solution on the melting temperature (T_m) of a DNA sample. What is the explanation for this relationship?