Chromatin Structure and Function

This video tutorial from Shos Biology explains the concepts of chromatin, chromosome, chromatid, and DNA. It covers the structure and function of chromatin, how it condenses into chromosomes during cell division, and the role of chromatids in DNA replication. The video also discusses chromatin remodeling and its impact on gene expression. The tutorial aims to clarify these complex topics for students, encouraging them to engage with the content and subscribe for more educational videos.

What is the primary role of chromatin in eukaryotic cells?

• To organize and package DNA

• To synthesize RNA

• To store energy

• To transport proteins

Which protein is primarily involved in the formation of chromatin?

• Keratin

• Tubulin

• Actin

• Histone

What is the structure formed when DNA wraps around histone proteins?

• Chromatid

• Ribosome

• Centromere

• Nucleosome

Which of the following is NOT a component of chromatin?

• Scaffolding proteins

• DNA

• RNA

• Histone proteins

During which phase of cell division do chromatin fibers condense into chromosomes?

• Interphase

• Prophase

• Anaphase

• Metaphase

What happens to chromatin during the process of cell division?

• It expands and becomes less visible

• It converts into RNA

• It condenses into chromosomes

• It disintegrates

What is the main difference between sister chromatids and non-sister chromatids?

• Sister chromatids are identical copies, while non-sister chromatids are not.

• Sister chromatids are found in prokaryotes, non-sister chromatids in eukaryotes.

• Sister chromatids are made of RNA, non-sister chromatids of DNA.

• Sister chromatids are visible under a microscope, non-sister chromatids are not.

How are sister chromatids formed?

• By the replication of a chromosome

• By the division of a single chromatid

• By the fusion of two different chromatids

• By the transcription of DNA

What is the purpose of chromatin remodeling?

• To convert DNA into RNA

• To destroy unnecessary DNA

• To allow access to DNA for transcription

• To permanently lock DNA in place

What is the role of histone modifications in gene expression?

• They convert DNA into proteins

• They prevent DNA replication

• They facilitate DNA repair

• They control the accessibility of DNA for transcription