Exam 11: Chromosome Structure and DNA Sequence Organization

List several configurations that characterize different viral chromosomes.

A particular variant of the lambda bacteriophage has a DNA double-stranded genome of 51,365 base pairs.How long would this DNA be?

What is unusual about the amino acid composition of histones? How is the function of histones related to the amino acid composition? Of which histones are nucleosomes composed?

In the formation of nucleosomes,one histone class,H1,is not directly involved,yet it does associate with DNA to form higher-level chromosomal structures.Where does this histone (H1)associate?

Describe the basic structure of a nucleosome.What is the role of histone H1?

How does a polytene chromosome differ from a typical eukaryotic chromosome?

The E.coli chromosome is circular and double-stranded DNA.

Describe the chromosomal conformations of ?X174 and polyoma viruses.

Briefly describe the makeup of VNTRs (variable number tandem repeats).

Compare and contrast the chromosome structure of viruses,bacteria,and eukaryotes.

In contrast with euchromatin,heterochromatin contains more genes and is earlier replicating.

What similarities do bacterial chromosomes have with eukaryotic chromosomes?

That some organisms contain much larger amounts of DNA than are apparently "needed" and that some relatively closely related organisms may have vastly different amounts of DNA is more typical in ________.

What is the function of a TERRA (telomere repeat-containing RNA)?