chapter 10

Chromosomal regions which are always heterochromatic and permanently inactive with regard to transcription?

• Constitutive heterochromatin

• Facultative heterochromatin

• Euchromatin

• Transcription

How is a multiprotein complex which plays a critical role in sister chromatid alignment called?

• Condensin

• Histone proteins

• Cohesin

• Non-histone protein

What would you call a collection of fibers that line the inner nuclear membrane?

• Nuclear matrix

• Nuclear lamina

• Internal nuclear matrix

• 30-nm fiber

An enzyme which can relax negative supercoils?

• DNA gyrase

• Topoisomerase I

• Topoisomerase II

• Telomerase

Regions of DNA that bind to the nuclear matrix, or nucleoskeleton?

• Scaffold-attachment regions

• Matrix-attachment regions

• Intergenic regions

• Condensed regions

Number of times a particular base sequence appears throughout the genome?

• Transposable elements

• Moderately repetitive sequences

• Highly repetitive sequences

• Sequence complexity

Specialized regions at the end of linear chromosomes, which prevent chromosomal rearrangements such as translocation and chromosome shortening?

• Centromeres

• Kinetochore

• Telomeres

• Nucleoid

A highly compacted chromosome found inside a bacterial cell:

• Nucleoid

• Nucleotide

• Nucleosome

• Nucleus

A segment of chromosomal DNA folded into a structure that resembles a loop:

• DNA supercoiling

• Loop domains

• Nucleoid

• Introns

Or a tandem repeat, when a very short nucleotide sequence is repeated many times in a row:

• Tandem array

• Moderately repetitive sequences

• Highly repetitive sequences

• Sequence complexity