Which Histone Helps Stabilize The Solenoid Structure

Question:

Answer: Bacterial genomes may consist of a single, circular chromosome or multiple chromosomes that may be linear or circular.

Question: Where are bacterial chromosomes located within the cell?

Answer: nucleoid

Question: What is meant by the “beads on a string” model of chromatin?

Answer: The beads are the nucleosomes, and the string is the linker DNA

Question: Rank the following levels of chromatin compaction in eukaryotes from the least compact to the most compact.

Answer:

Question: Which histone helps stabilize the solenoid structure?

Answer: H1

The histone protein H1 plays a key role in stabilizing the 30-nm solenoid structure. The long N-terminal and C-terminal ends of the H1 protein attach to adjacent nucleosome core particles pulling them into an orderly solenoid array.

Question:

Answer:

Question: A cell can form 10-nm chromatin fibers, but not 30-nm fibers. Which molecule has likely been removed or mutated in this cell?

H3

H1

topoisomerase

H2A

SMC proteins

Answer: H1

Question: How many pairs of chromosomes are found in a typical human somatic cell’s karyotype?

Answer: 23

Question: Which type of chromosome has no p arms?

metacentric

acrocentric

subacrocentric

submetacentric

telocentric

Answer: telocentric

Question: Which type of DNA produces a light band when treated with Giemsa stain?

euchromatin

centromere DNA

DNA that is not actively transcribed

heterochromatin

Answer: euchromatin

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