#3 DNA Packaging and Chromatin Structure Quiz

What is the significance of the DNA being tightly packed into chromosomes?

• To allow for gene expression
• To fit into the nucleus
• To facilitate DNA replication
• To prevent mutations

When do chromosomes become visible under a microscope?

• During DNA replication
• When cells are dividing
• During transcription
• In the resting phase of the cell cycle

Tags

NGSS.HS-LS1-4

What happens to DNA organization after cell division?

• It becomes more organized
• It remains the same
• It becomes less organized
• It is completely degraded

How does the cell regulate the compaction level of chromatin?

• By adding or removing histone proteins
• By modifying the DNA sequence
• By changing the temperature inside the cell
• All of the above

What is the role of histone modification in chromatin organization?

• It has no effect on chromatin structure
• It loosens chromatin to allow for gene expression
• It tightens chromatin to repress gene expression
• Both B and C

How does the 3D organization of chromatin influence gene expression?

• It has no impact on gene expression
• It brings enhancers and promoters together
• It randomly distributes genes throughout the nucleus
• Both A and C

How does the structure of chromatin change during the cell cycle?

• It remains constant
• It becomes more condensed during interphase
• It becomes less condensed during mitosis
• It becomes more condensed during mitosis

Which of the following best describes the relationship between chromatin and gene expression?

• Tightly packed chromatin enhances gene expression
• Loosely packed chromatin inhibits gene expression
• Tightly packed chromatin inhibits gene expression
• Chromatin structure has no effect on gene expression