Question 1

Define "specific linking difference" ($\sigma$),also called superhelical density.

Accepted Answer

The specific linking differenc

Question 2

Indicate whether the following statements are true (T)or false (F).
___ The linking number (Lk)of a closed-circular DNA molecule can be changed only by
breaking one or both strands.
___ DNA of all organisms is overwound (i.e. ,positively supercoiled).
___ Topoisomerase I relaxes DNA that is highly negatively supercoiled.

Accepted Answer

A) True 
 B)False

Question 3

Describe the composition and structure of a nucleosome.

Accepted Answer

A nucleosome consists of 146 base pairs

Question 4

The fundamental repeating unit of organization in a eukaryotic chromosome is the:

Accepted Answer

A) centrosome. 
B) lysosome. 
C) microsome. 
D) nucleosome. 
E) polysome. 
A) centrosome. 
B) lysosome. 
C) microsome. 
D) nucleosome. 
E) polysome.

Question 5

The DNA in a bacterial (prokaryotic)chromosome is best described as:

Accepted Answer

A) a single circular double-helical molecule. 
B) a single linear double-helical molecule. 
C) a single linear single-stranded molecule. 
D) multiple linear double-helical molecules. 
E) multiple linear single-stranded molecules. 
A) a single circular double-helical molecule. 
B) a single linear double-helical molecule. 
C) a single linear single-stranded molecule. 
D) multiple linear double-helical molecules. 
E) multiple linear single-stranded molecules.

Question 6

The DNA in a eukaryotic chromosome is best described as:

Accepted Answer

A) a single circular double-helical molecule. 
B) a single linear double-helical molecule. 
C) a single linear single-stranded molecule. 
D) multiple linear double-helical molecules. 
E) multiple linear single-stranded molecules. 
A) a single circular double-helical molecule. 
B) a single linear double-helical molecule. 
C) a single linear single-stranded molecule. 
D) multiple linear double-helical molecules. 
E) multiple linear single-stranded molecules.

Define "specific linking difference" ( $\sigma$ ),also called superhelical density.

Describe the composition and structure of a nucleosome.

The fundamental repeating unit of organization in a eukaryotic chromosome is the:

The DNA in a bacterial (prokaryotic)chromosome is best described as:

The DNA in a eukaryotic chromosome is best described as:

The Foundations of Biochemistry

Water

Amino Acids, peptides, and Proteins

The Three-Dimensional Structure of Proteins

Protein Function

Enzymes

Carbohydrates and Glycobiology

Nucleotides and Nucleic Acids

Recombinant Dna Technology

Lipids

Biological Membranes and Transport

Biosignaling

Principles of Bioenergetics

Glycolysis, gluconeogenesis, and the Pentose Phosphate Pathway

Principles of Metabolic Regulation

The Citric Acid Cycle

Fatty Acid Catabolism

Amino Acid Oxidation and the Production of Urea

Oxidative Phosphorylation and Photophosphorylation

Carbohydrate Biosynthesis in Plants and Bacteria

Lipid Biosynthesis

Biosynthesis of Amino Acids, nucleotides, and Related Molecules

Integration and Hormonal Regulation of Mammalian Metabolism

Dna Metabolism

Rna Metabolism

Protein Metabolism

Regulation of Gene Expression

Filters

Exam 24: Genes and Chromosomes

Define "specific linking difference" ( σ\sigmaσ ),also called superhelical density.

Describe the composition and structure of a nucleosome.

The fundamental repeating unit of organization in a eukaryotic chromosome is the:

The DNA in a bacterial (prokaryotic)chromosome is best described as:

The DNA in a eukaryotic chromosome is best described as:

The Foundations of Biochemistry

Water

Amino Acids, peptides, and Proteins

The Three-Dimensional Structure of Proteins

Protein Function

Enzymes

Carbohydrates and Glycobiology

Nucleotides and Nucleic Acids

Recombinant Dna Technology

Lipids

Biological Membranes and Transport

Biosignaling

Principles of Bioenergetics

Glycolysis, gluconeogenesis, and the Pentose Phosphate Pathway

Principles of Metabolic Regulation

The Citric Acid Cycle

Fatty Acid Catabolism

Amino Acid Oxidation and the Production of Urea

Oxidative Phosphorylation and Photophosphorylation

Carbohydrate Biosynthesis in Plants and Bacteria

Lipid Biosynthesis

Biosynthesis of Amino Acids, nucleotides, and Related Molecules

Integration and Hormonal Regulation of Mammalian Metabolism

Dna Metabolism

Rna Metabolism

Protein Metabolism

Regulation of Gene Expression

Filters

Define "specific linking difference" ( $\sigma$ ),also called superhelical density.