Which statement is true concerning chromosome compaction during cell division?
A) Radial loops are not anchored to the scaffolding proteins.
B) Overall chromosomal length is shortened.
C) Compaction results in increased transcriptional rates.
D) The 30 nm fibers are altered to 60 nm fibers.

Question

Which statement is true concerning chromosome compaction during cell division?
A) Radial loops are not anchored to the scaffolding proteins.
B) Overall chromosomal length is shortened.
C) Compaction results in increased transcriptional rates.
D) The 30 nm fibers are altered to 60  nm fibers.

Quizplus · Accepted Answer

During cell division, chromosome compaction is essential for proper separation of the chromosomes. This compaction leads to a overall shortening of the chromosomal length. Radial loops, which are anchored to the scaffolding proteins, form from the 30 nm fibers, and ultimately contribute to the highly compacted chromosome structure. However, this compaction generally results in decreased transcriptional activity, not increased, since the DNA is less accessible to transcription factors and RNA polymerase. The 30 nm fibers may be further compacted to form 60 nm fibers in some cases, but this is not a universal feature of chromosome compaction during cell division.

Which Statement Is True Concerning Chromosome Compaction During Cell Division