Chromatin and Chromosome Functions

The video tutorial explains the different forms of DNA: chromatin, chromatids, and chromosomes. It describes how these forms exist at various stages in a cell's life, focusing on their structure and function. Chromosomes are visible during cell division, while chromatin is active in protein synthesis. The video also covers the cell cycle stages, highlighting when DNA is visible and how it changes form.

What do chromatin, chromatids, and chromosomes have in common?

• They are all lipids.

• They are all proteins.

• They are all forms of DNA.

• They are all forms of RNA.

How many total chromosomes should a human possess?

• 92

• 69

• 23

• 46

From whom do we inherit our chromosomes?

• From neither parent

• Equally from both parents

• Only from our mother

• Only from our father

What are the two identical halves of a chromosome called?

• Chromatin

• Chromatids

• Genes

• Centromeres

What is the purpose of sister chromatids being identical?

• To prevent cell division

• To ensure genetic diversity

• To facilitate protein synthesis

• To ensure each new cell receives a complete set of genetic information

What form does DNA take when it is actively being used to create proteins?

• Centromeres

• Chromosomes

• Chromatids

• Chromatin

What is the main function of chromatin in a cell?

• To protect the cell nucleus

• To serve as the active form of DNA for protein synthesis

• To provide structural support

• To store energy

During which stage of the cell cycle is DNA in its chromatin form?

• Anaphase

• Interphase

• Metaphase

• Prophase

When are chromosomes visible within a cell?

• During anaphase

• During prophase and metaphase

• During interphase

• During cytokinesis

What happens to chromatids during anaphase?

• They are pulled apart to opposite sides of the cell

• They unravel into chromatin

• They coil into chromosomes

• They remain unchanged