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